<PAGE>   1
                   As filed with the Securities and Exchange
                        Commission on February 15, 2001

                                Registration No.
                        -------------------------------

                            SECURITIES AND EXCHANGE
                                   COMMISSION
                             WASHINGTON, D.C. 20549

                        --------------------------------

                                    FORM S-8
            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                        ---------------------------------

                              UNITED BANCORP, INC.
             (Exact name of registrant as specified in its charter)

MICHIGAN                                                              38-2606280
(State or other jurisdiction of                                 (I.R.S. Employer
incorporation or organization)                                  Identification
                                                                Number)

                              UNITED BANCORP, INC.
                            205 E. CHICAGO BOULEVARD
                            TECUMSEH, MICHIGAN 49286
                                 (517) 423-8373
  (Address, including zip code, and telephone number, including area code, of
                   registrant's principal executive offices)

                        ---------------------------------

                   UNITED BANCORP, INC. 1999 STOCK OPTION PLAN
                            (Full title of the plan)

             DAVID S. HICKMAN, CHAIRMAN AND CHIEF EXECUTIVE OFFICER
                              UNITED BANCORP, INC.
                            205 E. CHICAGO BOULEVARD
                            TECUMSEH, MICHIGAN 49286
                                 (517) 423-8373
 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)

                                 WITH A COPY TO:

                               FRED B. GREEN, ESQ.
                            BODMAN, LONGLEY & DAHLING
                       34TH FLOOR, 100 RENAISSANCE CENTER
                             DETROIT, MICHIGAN 48243

                        ---------------------------------


                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
-----------------------------------------------------------------------------------------------------------------------
                                                Proposed Maximum           Proposed Maximum
Titles of Securities       Amount to be        Offering Price Per         Aggregate Offering            Amount of
to be Registered           Registered(1)             Share                     Price                Registration Fee
-----------------------------------------------------------------------------------------------------------------------
<S>                        <C>                 <C>                        <C>                       <C>
Common Stock               114,450 shares            49.50(2)                 $5,665,355(2)               $  1,416
(no par value)
</TABLE>

--------

         (1) Indicates (i) the number of shares of common stock, no par value,
authorized and reserved for issuance and which may be sold upon the exercise of
options or grant of common stock which may be granted to certain persons under
the United Bancorp, Inc. 1999 Stock Option Plan. Pursuant to Rule 416(a), this
Registration Statement shall also be deemed to cover any additional securities
to be offered or issued in connection with terms of the above-referenced plans
which provide for changes in the amount of securities to be offered or issued to
prevent dilution resulting from stock splits, stock dividends or similar
transactions.

         (2) Estimated solely for the purpose of computing the registration fees
only, pursuant to Rule 457(h), as follows: (i) as to 33,652 shares now under
option on the basis of the aggregate price at which such shares may be purchased
by optionees (approximately $45.91 per share); and (ii) as to 80,792 shares for
which options have not yet been granted on the basis of the average of the bid
and asked price for the common stock as quoted by Raymond James Financial (a
broker-dealer) on February 13, 2000 of $51.00 per share.

<PAGE>   2




PART I - INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS


ITEM 1.  PLAN INFORMATION

Not required to be filed with the Registration Statement


ITEM 2.  REGISTRANT INFORMATION AND EMPLOYEE PLAN ANNUAL INFORMATION.

Not required to be filed with the Registration Statement.



PART II  - INFORMATION REQUIRED IN REGISTRATION STATEMENT


ITEM 3.  INCORPORATION OF DOCUMENTS BY REFERENCE.

The following documents heretofore filed by United Bancorp, Inc. (the "Company")
with the Securities and Exchange Commission (the "Commission"), are incorporated
as of their respective dates in this Registration Statement by reference:

     1.   The Company's annual report on Form 10-K for the fiscal year ended
          December 31, 1999.

     2.   The Company's 2000 Definitive Proxy Statement.

     3.   The description of the Company's common stock, no par value, contained
          in the Company's Form 10 Registration Statement effective on March 31,
          1988.

All documents filed with the Commission by the Company pursuant to Sections
13(a), 13(c), 14, and 15(d) of the Exchange Act subsequent to the date of this
Registration Statement and prior to the filing of a post-effective amendment
hereto which indicates that all securities offered have been sold or which
deregisters all securities then remaining unsold shall be deemed to be
incorporated by reference in this Registration Statement and to be a part
thereof from the date of filing of such documents. Any statement contained in a
document all or a portion of which is incorporated or deemed to be incorporated
by reference herein shall be deemed to be modified or superseded for purposes of
this Registration Statement to the extent that a statement contained herein or
in any other subsequently filed document which also is or is deemed to be
incorporated by reference herein modifies or supersedes such statement. Any
statement so modified or superseded shall not be deemed, except as so modified
or superseded, to constitute a part of this Registration Statement.


ITEM 4.  DESCRIPTION OF SECURITIES.

Not applicable.


ITEM 5.  INTERESTS OF NAMED EXPERTS AND COUNSEL.

Not applicable.


ITEM 6.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

A.       The Michigan Business Corporation Act

         1.       Indemnification from Actions Brought by Third Parties

         The Company is incorporated under the laws of the State of Michigan and
is subject to the Michigan Business Corporation Act, as amended ("MBCA"). The
MBCA provides that a Michigan corporation may indemnify a person who was or is a
party or is threatened to be made a party to a threatened, pending, or completed
action, suit, or proceeding, whether civil, criminal, administrative, or
investigative and whether formal or informal, other than an action by or in the
right of the corporation ("Third Party Action"), by reason of the fact that he
or she is or was a director, officer, employee, or agent of the corporation, or
is or was serving at the request of the corporation as a director, officer,
partner, trustee, employee, or agent of another foreign or domestic corporation,
partnership, joint venture, trust, or



                                       2
<PAGE>   3

other enterprise, whether for profit or not, against expenses, including
attorneys' fees, judgments, penalties, fines, and amounts paid in settlement
actually and reasonably incurred by him or her in connection with the action,
suit, or proceeding, if the person acted in good faith and in a manner he or she
reasonably believed to be in or not opposed to the best interests of the
corporation or its shareholders, and with respect to a criminal action or
proceeding, if the person had no reasonable cause to believe his or her conduct
was unlawful ("Standard of Conduct"). The termination of an action, suit, or
proceeding by judgment, order, settlement, conviction, or upon a plea of nolo
contendere or its equivalent, does not, of itself, create a presumption that the
person did not act in good faith and in a manner which he or she reasonably
believed to be in or not opposed to the best interests of the corporation or its
shareholders, and, with respect to a criminal action or proceeding, had
reasonable cause to believe that his or her conduct was unlawful.

         2.       Indemnification from Actions By or In the Right of the
                  Corporation

         The MBCA further provides that a corporation has the power to indemnify
a person who was or is a party or is threatened to be made a party to a
threatened, pending, or completed action or suit by or in the right of the
corporation to procure a judgment in its favor ("Corporation Action") by reason
of the fact that he or she is or was a director, officer, employee, or agent of
the corporation, or is or was serving at the request of the corporation as a
director, officer, partner, trustee, employee, or agent of another foreign or
domestic corporation, partnership, joint venture, trust, or other enterprise,
whether for profit or not, against expenses, including attorneys' fees, and
amounts paid in settlement actually and reasonably incurred by the person in
connection with the action or suit, if the person acted in good faith and in a
manner the person reasonably believed to be in or not opposed to the best
interests of the corporation or its shareholders ("Standard of Conduct"), except
that no indemnification may be made for a claim, issue, or matter in which the
person has been found liable to the corporation except to the extent for any
indemnification against expenses that may be ordered by the Court.

         3.       Indemnification Against Expenses

         To the extent that a director, officer, employee, or agent of a
corporation has been successful on the merits or otherwise in defense of either
a Third Party Action or a Corporation Action, or in defense of a claim, issue,
or matter in the action, suit, or proceeding, he or she shall be indemnified
against actual and reasonable expenses, including attorneys' fees, incurred by
him or her in connection with the action, suit, or proceeding and an action,
suit, or proceeding brought to enforce the mandatory indemnification provided in
this paragraph.

         4.       Permissible Indemnification Provisions in the Articles of
                  Incorporation

         The articles of incorporation may contain a provision eliminating or
limiting a director's liability to the corporation or its shareholders for money
damages for any action taken or any failure to take any action as a director,
except liability for any of the following: (i ) the amount of a financial
benefit received by a director to which he or she is not entitled, or (ii )
intentional infliction of harm on the corporation or the shareholders, or (iii )
approval of certain wrongful corporate acts, or (iv ) an intentional criminal
act.

         5.       Determination of the Propriety of Indemnification and
                  Evaluation and Payment of Expenses

         To the extent that the articles of incorporation include a provision
eliminating or limiting the liability of a director, a corporation may indemnify
a director for the expenses and liabilities described in this paragraph without
a determination that the director has met the statutory Standards of Conduct
required for Third Party Actions and Corporation Actions, but no indemnification
may be made except to the extent authorized by a court, if the director received
a financial benefit to which he or she was not entitled, intentionally inflicted
harm on the corporation or its shareholders, approved certain wrongful corporate
acts, or intentionally committed a criminal act. In connection with a
Corporation Action, indemnification under this paragraph may be for expenses,
including attorneys' fees, actually and reasonably incurred. In connection with
a Third Party Action, indemnification under this paragraph may


                                       3
<PAGE>   4

be for expenses, including attorneys' fees, actually and reasonably incurred,
and for judgments, penalties, fines, and amounts paid in settlement actually and
reasonably incurred.

         In the absence of a provision in the articles of incorporation
eliminating or limiting the liability of a director, indemnification from Third
Party Actions or Corporation Actions, unless ordered by the court, shall be made
by the corporation only as authorized in the specific case upon a determination
that indemnification of the director, officer, employee, or agent is proper in
the circumstances because he or she has met the applicable Standard of Conduct
required for Third Party Actions and Corporate Actions and upon an evaluation of
the reasonableness of expenses and amounts paid in settlement.

         If a person is entitled to indemnification under the provisions
relating to either a Third Party Action or a Corporate Action for a portion of
expenses, including reasonable attorneys' fees, judgments, penalties, fines, and
amounts paid in settlement, but not for the total amount, the corporation may
indemnify the person for the portion of the expenses, judgments, penalties,
fines, or amounts paid in settlement for which the person is entitled to be
indemnified.

         The determination of the propriety of indemnification and evaluations
of the reasonableness of expenses and settlement shall be made in any of the
following ways: (a) by a majority vote of a quorum of the board consisting of
directors who are not parties or threatened to be made parties to the action,
suit, or proceeding, or (b) if a quorum cannot be obtained under subdivision
(a), by majority vote of a committee duly designated by the board and consisting
solely of two or more directors not at the time parties or threatened to be made
parties to the action, suit, or proceeding, or (c) by independent legal counsel
in a written opinion, which counsel shall be selected pursuant to the terms and
conditions of the MBCA, or (d) by all independent directors who are not parties
or threatened to be made parties to the action, suit, or proceeding, or (e) by
the shareholders, but shares held by directors, officers, employees, or agents
who are parties or threatened to be made parties to the action, suit, or
proceeding may not be voted.

         An authorization of payment of indemnification shall be made in any of
the following ways:

         (a) by the board in one of the following ways:

             (i) if there are two or more directors who are not parties or
             threatened to be made parties to the action, suit, or proceeding,
             by a majority vote of all directors who are not parties or
             threatened to be made parties, a majority of whom shall constitute
             a quorum for this purpose, (ii) by a majority of the members of a
             committee of two or more directors who are not parties or
             threatened to be made parties to the action, suit, or proceeding,
             (iii) if the corporation has 1 or more independent directors who
             are not parties or threatened to be made parties to the action,
             suit, or proceeding, by a majority vote of all independent
             directors who are not parties or are threatened to be made parties,
             a majority of whom shall constitute a quorum for this purpose, (iv)
             if there are no independent directors and less than two directors
             who are not parties or threatened to be made parties to the action,
             suit, or proceeding, by the vote necessary for action by the board
             in accordance with the MBCA, in which authorization all directors
             may participate.

         (b) by the shareholders, but shares held by directors, officers,
employees, or agents who are parties or threatened to be made parties to the
action, suit, or proceeding may not be voted on the authorization.

         6.  Payment or Reimbursement of Reasonable Expenses Prior to Final
             Disposition of Proceedings.

         A corporation may pay or reimburse the reasonable expenses incurred by
a director, officer, employee, or agent who is a party or threatened to be made
a party to an action, suit, or proceeding in advance of final disposition of the
proceeding if both of the following apply: (a) the person furnishes the
corporation a written affirmation of his or her good faith belief that he or she
has met the applicable Standard of Conduct required for Third Party Actions and
Corporation Actions, and (b) the person furnishes the corporation a written
undertaking, executed personally or on his or her behalf, to repay the advance
if it is ultimately determined that he or she did not meet the applicable
Standard of Conduct



                                       4
<PAGE>   5
required for Third Party Actions and Corporation Actions. The undertaking must
be an unlimited general obligation of the person but need not be secured and may
be accepted without reference to the financial ability of the person to make
repayment.

         Determinations and evaluations shall be made in the same manner as
described in paragraph 5 above.

         A provision in the articles of incorporation or bylaws, a resolution of
the board or shareholders, or an agreement making indemnification mandatory
shall also make the advancement of expenses mandatory unless the provision,
resolution, or agreement specifically provides otherwise.

         7.       Statutory Indemnification or Advancement of Expenses is Not
                  Exclusive.

         The indemnification or advancement of expenses provided under the MBCA
is not exclusive of other rights to which a person seeking indemnification or
advancement of expenses may be entitled under the articles of incorporation,
bylaws, or a contractual agreement. The total amount of expenses advanced or
indemnified from all sources combined shall not exceed the amount of actual
expenses incurred by the person seeking indemnification or advancement of
expenses. The indemnification provided for in the MBCA continues as to a person
who ceases to be a director, officer, employee, or agent and shall inure to the
benefit of the heirs, personal representatives, and administrators of the
person.

         8.       Liability Insurance.

         A corporation may purchase and maintain insurance on behalf of any
person who is or was a director, officer, employee, or agent of the corporation,
or who is or was serving at the request of the corporation as a director,
officer, partner, trustee, employee, or agent of another corporation,
partnership, joint venture, trust, or other enterprise against any liability
asserted against him or her and incurred by him or her in any such capacity or
arising out of his or her status as such, whether or not the corporation would
have power to indemnify him or her against liability under other provisions of
the MBCA.

         B.       Company's Articles of Incorporation

         The Company's Articles of Incorporation provide that a director of the
Company shall not be personally liable to the Company or its shareholders for
monetary damages for a breach of the director's fiduciary duty, except in the
event of any of the following: (i) a breach of the director's duty of loyalty to
the Company or its shareholders, (ii) acts or omissions not in good faith or
that involve intentional misconduct or a knowing violation of the law, (iii)
approval of certain wrongful acts, (iv) a transaction from which the director
derived an improper benefit, (v) acts or omissions occurring before May 8, 1996.

         C.       Company's Bylaws

         Article VI of the Company's Bylaws provides for indemnification of
directors and officers and permits indemnification of other parties, as follows:

         SECTION 1. THIRD PARTY ACTIONS. The Company shall indemnify any person
who was or is a party or is threatened to be made a party to a threatened,
pending or completed action, suit or proceeding, whether civil, criminal,
administrative or investigative and whether formal or informal (other than an
action by or in the right of the corporation) by reason of the fact that he is
or was a director, officer, employee or agent of the Company, or is or was
serving at the request of the Company as a director, officer, partner, trustee,
employee or agent of another foreign or domestic corporation, partnership, joint
venture, trust or other enterprise, whether for profit or not, against expenses
(including attorneys' fees), judgments, penalties, fines and amounts paid in
settlement actually and reasonably incurred by him in connection with the
action, suit or proceeding if he acted in good faith and in a manner he
reasonably believed to be in or not opposed to the best interests of the
corporation or its shareholders, and with respect to a criminal action or
proceeding, if such person had no reasonable cause to believe his conduct was
unlawful. The termination of any action, suit or proceeding by judgment, order,
settlement, conviction, or upon a plea of nolo contendere or its equivalent,
shall not, of itself, create a presumption that the person did not act in good
faith and in a manner which he reasonably believed to be in or not



                                       5
<PAGE>   6

opposed to the best interests of the corporation or its shareholders, and, with
respect to any criminal action or proceeding, had reasonable cause to believe
that his conduct was unlawful.

         SECTION 2. ACTIONS IN THE RIGHT OF THE CORPORATION. The Company shall
indemnify a person who was or is a party to or is threatened to be made a party
to a threatened, pending or completed action or suit by or in the right of the
Company to procure a judgment in its favor by reason of the fact that he is or
was a director, officer, employee or agent of the corporation, or is or was
serving at the request of the Company as a director, officer, partner, trustee,
employee or agent of another foreign or domestic corporation, partnership, joint
venture, trust or other enterprise, whether for profit or not, against expense
(including actual and reasonable attorneys' fees) and amounts paid in settlement
incurred by him in connection with the action or suit if he acted in good faith
and in a manner he reasonably believed to be in or not opposed to the best
interests of the corporation or its shareholders.

         However, indemnification shall not be made for a claim, issue or matter
as to which such person has been found liable to the Company unless and only to
the extent that the court in which the action or suit was brought has determined
upon application that, despite the adjudication of liability but in view of all
circumstances of the case, such person is fairly and reasonably entitled to
indemnification for the expenses which the court considers proper.

         SECTION 3. MANDATORY AND PERMISSIVE PAYMENTS. To the extent that a
director, officer, employee, or agent of a corporation has been successful on
the merits or otherwise in defense of an action, suit, or proceeding referred to
in Sections 1 or 2 of Article VI, or in defense of any claim, issue, or matter
in the action, suit, or proceeding, he shall be indemnified against expenses
(including actual and reasonable attorneys' fees), incurred by him in connection
with the action, suit, or proceeding and an action, suit, or proceeding brought
to enforce the mandatory indemnification provided hereby.

         Any indemnification under Sections 1 or 2 of Article VI, unless ordered
by a court, shall be made by the Company only as authorized in the specific case
upon a determination that indemnification of the director, officer, employee or
agent is proper in the circumstances because he has met the applicable standard
of conduct set forth in Sections 1 and 2 of Article VI. Such determination shall
be made in any of the following ways: (a) by a majority vote of a quorum of the
board consisting of directors who were not parties to the action, suit, or
proceeding, or (b) if such quorum is not obtainable, then by a majority vote of
a committee of directors who are not parties to the action, suit or proceeding.
The committee shall consist of not less than 2 disinterested directors, or, (c)
by independent legal counsel in a written opinion, or (d) by the shareholders.

         If a person is entitled to indemnification under Sections 1 or 2 of
Article VI for a portion of expenses, including reasonable attorneys' fees,
judgments, penalties, fines, and amounts paid in settlement, but not for the
total amount, the corporation may indemnify the person for the portion of the
expenses, judgments, penalties, fines, or amounts paid in settlement for which
the person is entitled to be indemnified.

         SECTION 4. EXPENSE ADVANCES. Expenses incurred in defending a civil or
criminal action, suit or proceeding described in Sections 1 and 2 of Article VI
may be paid by the Company in advance of the final disposition of the action,
suit or proceeding upon receipt of an undertaking by or on behalf of the
director officer, employee or agent to repay the expenses if it is ultimately
determined that he is not entitled to be indemnified by the Company. The
undertaking shall be by an unlimited general obligation of the person on whose
behalf advances are made but need not be secured.

         SECTION 5. VALIDITY OF PROVISIONS. A provision made to indemnify
directors or officers of any action, suit or proceeding referred to in Sections
1 and 2 of Article VI whether contained in the articles of incorporation, the
bylaws, a resolution of shareholders or directors, an agreement or otherwise,
shall be invalid only insofar as it is in conflict with Sections 1 to 5 of
Article VI. The indemnification provided in Sections 1 to 5 of Article VI
continues as to a person who has ceased to be a director, officer, employee or
agent and shall inure to the benefit of the heirs, executors and administrators
of such person.

         SECTION 6. INSURANCE. The Company may purchase and maintain insurance
on behalf of any person who is or was a director, officer, employee or agent of
the Company, or is or was serving at



                                       6
<PAGE>   7

the request of the Company as a director, officer, employee or agent of another
corporation, partnership, joint venture, trust or other enterprise against any
liability asserted against him and incurred by him in any such capacity or
arising out of his status as such, whether or not the Company would have the
power to indemnify him against such liability under sections 1 to 5 of Article
VI.

         SECTION 8. NONEXCLUSIVITY. The indemnification or advancement of
expenses provided in Article VI is not exclusive of other rights to which a
person seeking indemnification or advancement of expenses may be entitled under
the Company's articles of incorporation or a contractual agreement. However, the
total amount of expenses advanced or indemnified from all sources combined shall
not exceed the amount of actual expenses incurred by the person seeking
indemnification or advancement of expenses.


ITEM 7.  EXEMPTION FROM REGISTRATION.

Not applicable.


ITEM 8.  EXHIBITS.

The following documents are attached hereto or incorporated herein by reference
as exhibits to this Registration Statement:

Exhibit Number             Description of Document

4(a)                       Restated Articles of Incorporation of United Bancorp,
                           Inc., filed as Exhibit (4)(a) to registrant's
                           registration statement on Form S-8 (File Number
                           333-03305) dated May 8, 1996, and incorporated herein
                           by reference.

4(b)                       Bylaws of United Bancorp, Inc., filed as Exhibit
                           (4)(b) to the Company's registration statement on
                           Form S-8 (File Number 333-3305) dated May 8, 1996,
                           and incorporated herein by reference.

4(c)                       United Bancorp, Inc. 1999 Stock Option Plan, filed as
                           Appendix B to the Company's Definitive 14A Proxy
                           Statement dated March 24, 2000 and incorporated
                           herein by reference.

5                          Opinion and Consent of Bodman, Longley, LLP as to the
                           legality of the securities being registered.

23(a)                      Consent of Crowe, Chizek and Company LLP, independent
                           auditors.

23(b)                      Consent of Bodman, Longley, & Dahling, LLP, legal
                           counsel (contained in Exhibit 5).

24                         Powers of Attorney (contained in the signature pages
                           of this Registration Statement).


ITEM 9.  UNDERTAKINGS.

A.       The undersigned Registrant hereby undertakes:

         (1)      To file, during any period in which offers or sales are being
                  made, a post-effective amendment to this Registration
                  Statement:

                  (i)      To include any prospectus required by Section
                           10(a)(3) of the Securities Act of 1933;

                  (ii)     To reflect in the prospectus any facts or events
                           arising after the effective date of the Registration
                           Statement (or the most recent post-effective
                           amendment thereof) which, individually or in the
                           aggregate, represent a fundamental change in the
                           information set forth in the Registration Statement;

                                       7
<PAGE>   8

                  (iii)    To include any material information with respect to
                           the plan of distribution not previously disclosed in
                           the Registration Statement or any material change to
                           such information in the Registration Statement;

                  Provided, however that paragraphs A(1)(i) and A(1)(ii) shall
                  not apply if the information required to be included in a
                  post-effective amendment by those paragraphs is contained in
                  periodic reports filed by the Registrant pursuant to Section
                  13 or Section 15(d) of the Securities Exchange Act of 1934
                  that are incorporated by reference in the Registration
                  Statement.

         (2)      That, for the purpose of determining any liability under the
                  Securities Act of 1933, each such post-effective amendment
                  shall be deemed to be a new Registration Statement relating to
                  the securities offered therein, and the offering of such
                  securities at that time shall be deemed to be the initial bona
                  fide offering thereof.

         (3)      To remove from registration by means of a post-effective
                  amendment any of the securities being registered which remain
                  unsold at the termination of the offering.

(B)      The undersigned Registrant hereby undertakes that, for purposes of
         determining any liability under the Securities Act of 1933, each filing
         of the Registrant's annual report pursuant to Section 13(a) or Section
         15(d) of the Securities Exchange Act of 1934 (and, where applicable,
         each filing of an employee benefit plan's annual report pursuant to
         Section 15(d) of the Securities Exchange Act of 1934) that is
         incorporated by reference in this Registration Statement shall be
         deemed to be a new registration statement relating to the securities
         offered herein, and the offering of such securities at that time shall
         be deemed to be the initial bona fide offering thereof.

(C)      Insofar as indemnification for liabilities arising under the Securities
         Act of 1933 may be permitted to directors, officers and controlling
         persons of the Registrant pursuant to the foregoing provisions, or
         otherwise, the Registrant has been advised that in the opinion of the
         Securities and Exchange Commission such indemnification is against
         public policy as expressed in the Act and is, therefore, unenforceable.
         In the event that a claim for indemnification against such liabilities
         (other than the payment by the Registrant of expenses incurred or paid
         by a director, officer or controlling person of the Registrant in the
         successful defense of any action, suit or proceeding) is asserted by
         such director, officer or controlling person in connection with the
         securities being registered, the Registrant will, unless in the opinion
         of its counsel the matter has been settled by controlling precedent,
         submit to a court of appropriate jurisdiction the question whether such
         indemnification by it is against public policy as expressed in the Act
         and will be governed by the final adjudication of such issue.


                                   SIGNATURES

The Registrant. Pursuant to the requirements of the Securities Act of 1933, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing of Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Tecumseh, State of Michigan on February 14, 2001.

                                        UNITED BANCORP, INC.


                                        By: /s/ David S. Hickman
                                           -------------------------------
                                            David S. Hickman,
                                            Chairman and Chief Executive Officer



                                       8
<PAGE>   9


Pursuant to the requirements of the Securities Act of 1933, this Registration
Statement has been signed below on February 14, 2001, by the following persons
in the capacities indicated below. By so signing, each of the undersigned, in
his capacity as a director or officer, or both, as the case may be, of the
Registrant, does hereby appoint David S. Hickman and Dale L. Chadderdon, and
each of them severally, his or her true and lawful attorney to execute in his or
her name, place and stead, in his or her capacity as a director or officer, or
both, as the case may be, of the Registrant, any and all amendments to this
Registration Statement and post-effective amendments thereto (including
prospectus supplements) and all instruments necessary or incidental in
connection therewith, and to file the same with the Securities and Exchange
Commission. Each of said attorneys shall have full power and authority to do and
perform in the name and on behalf of each of the undersigned, in any and all
capacities, every act whatsoever requisite or necessary to be done in the
premises as fully, and for all intents and purposes, as each of the undersigned
might or could do in person, the undersigned hereby ratifying and approving the
acts of said attorneys and each of them.


<TABLE>
<S>                                                               <C>
        /s/ David S. Hickman                                             /s/ Dale L. Chadderdon
---------------------------------------------------------         ----------------------------------------------------
David S. Hickman, Chairman, Chief Executive Officer and           Dale L. Chadderdon, Senior Vice President,
Director (principal executive officer)                            Secretary and Treasurer (principal financial and
                                                                  accounting officer)

        /s/ John J. Wanke                                               /s/   Ann Hilsdale Knisel
---------------------------------------------------------         ----------------------------------------------------
John J. Wanke, President, Chief Operating Officer and             Ann Hinsdale Knisel, Director
Director

       /s/ David N. Berlin                                              /s/   Jeffrey A. Kuhman
---------------------------------------------------------         ----------------------------------------------------
David N. Berlin, Director                                         Jeffrey A. Kuhman, Director

      /s/ L. Donald Bush                                                /s/   James C. Lawson
---------------------------------------------------------         ----------------------------------------------------
L. Donald Bush, Director                                          James C. Lawson, Director

      /s/ Joseph D. Butcko                                              Donald J. Martin
---------------------------------------------------------         ----------------------------------------------------
Joseph D. Butcko, Director                                        Donald J. Martin, Director

      /s/ Patrick D. Farver
---------------------------------------------------------         ----------------------------------------------------
Patrick D. Farver, Director                                       David E Maxwell, Director

      /s/ John H. Foss                                                  /s/   Kathryn M. Mohr
---------------------------------------------------------         ----------------------------------------------------
John H. Foss, Director                                            Kathryn M. Mohr, Director

      /s/ Richard A. Gurdjian
---------------------------------------------------------         ----------------------------------------------------
Richard A. Gurdjian, Director                                     Richard R. Niethammer, Director

      /s/ Scott F. Hill                                                 /s/   John R. Robertstad
---------------------------------------------------------         ----------------------------------------------------
Scott F. Hill, Director                                           John R. Robertstad, Director
</TABLE>



                                       9
<PAGE>   10


                                  EXHIBIT INDEX


Exhibit Number                              Description of Document

4(a)                       Restated Articles of Incorporation of United Bancorp,
                           Inc., filed as Exhibit (4)(a) to registrant's
                           registration statement on Form S-8 (File Number
                           333-03305) dated May 8, 1996, and incorporated herein
                           by reference.

4(b)                       Bylaws of United Bancorp, Inc., filed as Exhibit
                           (4)(b) to the Company's registration statement on
                           Form S-8 (File Number 333-3305) dated May 8, 1996,
                           and incorporated herein by reference.

4(c)                       United Bancorp, Inc. 1999 Stock Option Plan, filed as
                           Appendix B to the Company's Definitive 14A Proxy
                           Statement dated March 24, 2000 and incorporated
                           herein by reference.

5                          Opinion and Consent of Bodman, Longley, LLP as to the
                           legality of the securities being registered.

23(a)                      Consent of Crowe, Chizek and Company LLP, independent
                           auditors.

23(b)                      Consent of Bodman, Longley, & Dahling, LLP, legal
                           counsel (contained in Exhibit 5).

24                         Powers of Attorney (contained in the signature pages
                           of this Registration Statement).



                                       10
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{"company-data": {"conformed-name": "UNITED BANCORP INC /MI/", "cik": "0000775345", "assigned-sic": "6022", "irs-number": "382606280", "state-of-incorporation": "MI", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-55680", "film-number": "1547593"}, "business-address": {"street1": "205 E CHICAGO BLVD", "city": "TECUMSEH", "state": "MI", "zip": "49286", "phone": "5174238373"}, "mail-address": {"street1": "205 E CHICAGO BLVD", "street2": "P O BOX 248", "city": "TECUMSEH", "state": "MI", "zip": "49286"}}
1
                   As filed with the Securities and Exchange
                        Commission on February 15, 2001

                                Registration No.
                        -------------------------------

                            SECURITIES AND EXCHANGE
                                   COMMISSION
                             WASHINGTON, D.C. 20549

                        --------------------------------

                                    FORM S-8
            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                        ---------------------------------

                              UNITED BANCORP, INC.
             (Exact name of registrant as specified in its charter)

MICHIGAN                                                              38-2606280
(State or other jurisdiction of                                 (I.R.S. Employer
incorporation or organization)                                  Identification
                                                                Number)

                              UNITED BANCORP, INC.
                            205 E. CHICAGO BOULEVARD
                            TECUMSEH, MICHIGAN 49286
                                 (517) 423-8373
  (Address, including zip code, and telephone number, including area code, of
                   registrant's principal executive offices)

                        ---------------------------------

                   UNITED BANCORP, INC. 1999 STOCK OPTION PLAN
                            (Full title of the plan)

             DAVID S. HICKMAN, CHAIRMAN AND CHIEF EXECUTIVE OFFICER
                              UNITED BANCORP, INC.
                            205 E. CHICAGO BOULEVARD
                            TECUMSEH, MICHIGAN 49286
                                 (517) 423-8373
 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)

                                 WITH A COPY TO:

                               FRED B. GREEN, ESQ.
                            BODMAN, LONGLEY & DAHLING
                       34TH FLOOR, 100 RENAISSANCE CENTER
                             DETROIT, MICHIGAN 48243

                        ---------------------------------

                         CALCULATION OF REGISTRATION FEE
-----------------------------------------------------------------------------------------------------------------------
                                                Proposed Maximum           Proposed Maximum
Titles of Securities       Amount to be        Offering Price Per         Aggregate Offering            Amount of
to be Registered           Registered(1)             Share                     Price                Registration Fee
-----------------------------------------------------------------------------------------------------------------------
Common Stock               114,450 shares            49.50(2)                 $5,665,355(2)               $  1,416
(no par value)
--------

         (1) Indicates (i) the number of shares of common stock, no par value,
authorized and reserved for issuance and which may be sold upon the exercise of
options or grant of common stock which may be granted to certain persons under
the United Bancorp, Inc. 1999 Stock Option Plan. Pursuant to Rule 416(a), this
Registration Statement shall also be deemed to cover any additional securities
to be offered or issued in connection with terms of the above-referenced plans
which provide for changes in the amount of securities to be offered or issued to
prevent dilution resulting from stock splits, stock dividends or similar
transactions.

         (2) Estimated solely for the purpose of computing the registration fees
only, pursuant to Rule 457(h), as follows: (i) as to 33,652 shares now under
option on the basis of the aggregate price at which such shares may be purchased
by optionees (approximately $45.91 per share); and (ii) as to 80,792 shares for
which options have not yet been granted on the basis of the average of the bid
and asked price for the common stock as quoted by Raymond James Financial (a
broker-dealer) on February 13, 2000 of $51.00 per share.
2

PART I - INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS

ITEM 1.  PLAN INFORMATION

Not required to be filed with the Registration Statement

ITEM 2.  REGISTRANT INFORMATION AND EMPLOYEE PLAN ANNUAL INFORMATION.

Not required to be filed with the Registration Statement.

PART II  - INFORMATION REQUIRED IN REGISTRATION STATEMENT

ITEM 3.  INCORPORATION OF DOCUMENTS BY REFERENCE.

The following documents heretofore filed by United Bancorp, Inc. (the "Company")
with the Securities and Exchange Commission (the "Commission"), are incorporated
as of their respective dates in this Registration Statement by reference:

     1.   The Company's annual report on Form 10-K for the fiscal year ended
          December 31, 1999.

     2.   The Company's 2000 Definitive Proxy Statement.

     3.   The description of the Company's common stock, no par value, contained
          in the Company's Form 10 Registration Statement effective on March 31,
          1988.

All documents filed with the Commission by the Company pursuant to Sections
13(a), 13(c), 14, and 15(d) of the Exchange Act subsequent to the date of this
Registration Statement and prior to the filing of a post-effective amendment
hereto which indicates that all securities offered have been sold or which
deregisters all securities then remaining unsold shall be deemed to be
incorporated by reference in this Registration Statement and to be a part
thereof from the date of filing of such documents. Any statement contained in a
document all or a portion of which is incorporated or deemed to be incorporated
by reference herein shall be deemed to be modified or superseded for purposes of
this Registration Statement to the extent that a statement contained herein or
in any other subsequently filed document which also is or is deemed to be
incorporated by reference herein modifies or supersedes such statement. Any
statement so modified or superseded shall not be deemed, except as so modified
or superseded, to constitute a part of this Registration Statement.

ITEM 4.  DESCRIPTION OF SECURITIES.

Not applicable.

ITEM 5.  INTERESTS OF NAMED EXPERTS AND COUNSEL.

Not applicable.

ITEM 6.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

A.       The Michigan Business Corporation Act

         1.       Indemnification from Actions Brought by Third Parties

         The Company is incorporated under the laws of the State of Michigan and
is subject to the Michigan Business Corporation Act, as amended ("MBCA"). The
MBCA provides that a Michigan corporation may indemnify a person who was or is a
party or is threatened to be made a party to a threatened, pending, or completed
action, suit, or proceeding, whether civil, criminal, administrative, or
investigative and whether formal or informal, other than an action by or in the
right of the corporation ("Third Party Action"), by reason of the fact that he
or she is or was a director, officer, employee, or agent of the corporation, or
is or was serving at the request of the corporation as a director, officer,
partner, trustee, employee, or agent of another foreign or domestic corporation,
partnership, joint venture, trust, or

                                       2
3

other enterprise, whether for profit or not, against expenses, including
attorneys' fees, judgments, penalties, fines, and amounts paid in settlement
actually and reasonably incurred by him or her in connection with the action,
suit, or proceeding, if the person acted in good faith and in a manner he or she
reasonably believed to be in or not opposed to the best interests of the
corporation or its shareholders, and with respect to a criminal action or
proceeding, if the person had no reasonable cause to believe his or her conduct
was unlawful ("Standard of Conduct"). The termination of an action, suit, or
proceeding by judgment, order, settlement, conviction, or upon a plea of nolo
contendere or its equivalent, does not, of itself, create a presumption that the
person did not act in good faith and in a manner which he or she reasonably
believed to be in or not opposed to the best interests of the corporation or its
shareholders, and, with respect to a criminal action or proceeding, had
reasonable cause to believe that his or her conduct was unlawful.

         2.       Indemnification from Actions By or In the Right of the
                  Corporation

         The MBCA further provides that a corporation has the power to indemnify
a person who was or is a party or is threatened to be made a party to a
threatened, pending, or completed action or suit by or in the right of the
corporation to procure a judgment in its favor ("Corporation Action") by reason
of the fact that he or she is or was a director, officer, employee, or agent of
the corporation, or is or was serving at the request of the corporation as a
director, officer, partner, trustee, employee, or agent of another foreign or
domestic corporation, partnership, joint venture, trust, or other enterprise,
whether for profit or not, against expenses, including attorneys' fees, and
amounts paid in settlement actually and reasonably incurred by the person in
connection with the action or suit, if the person acted in good faith and in a
manner the person reasonably believed to be in or not opposed to the best
interests of the corporation or its shareholders ("Standard of Conduct"), except
that no indemnification may be made for a claim, issue, or matter in which the
person has been found liable to the corporation except to the extent for any
indemnification against expenses that may be ordered by the Court.

         3.       Indemnification Against Expenses

         To the extent that a director, officer, employee, or agent of a
corporation has been successful on the merits or otherwise in defense of either
a Third Party Action or a Corporation Action, or in defense of a claim, issue,
or matter in the action, suit, or proceeding, he or she shall be indemnified
against actual and reasonable expenses, including attorneys' fees, incurred by
him or her in connection with the action, suit, or proceeding and an action,
suit, or proceeding brought to enforce the mandatory indemnification provided in
this paragraph.

         4.       Permissible Indemnification Provisions in the Articles of
                  Incorporation

         The articles of incorporation may contain a provision eliminating or
limiting a director's liability to the corporation or its shareholders for money
damages for any action taken or any failure to take any action as a director,
except liability for any of the following: (i ) the amount of a financial
benefit received by a director to which he or she is not entitled, or (ii )
intentional infliction of harm on the corporation or the shareholders, or (iii )
approval of certain wrongful corporate acts, or (iv ) an intentional criminal
act.

         5.       Determination of the Propriety of Indemnification and
                  Evaluation and Payment of Expenses

         To the extent that the articles of incorporation include a provision
eliminating or limiting the liability of a director, a corporation may indemnify
a director for the expenses and liabilities described in this paragraph without
a determination that the director has met the statutory Standards of Conduct
required for Third Party Actions and Corporation Actions, but no indemnification
may be made except to the extent authorized by a court, if the director received
a financial benefit to which he or she was not entitled, intentionally inflicted
harm on the corporation or its shareholders, approved certain wrongful corporate
acts, or intentionally committed a criminal act. In connection with a
Corporation Action, indemnification under this paragraph may be for expenses,
including attorneys' fees, actually and reasonably incurred. In connection with
a Third Party Action, indemnification under this paragraph may

                                       3
4

be for expenses, including attorneys' fees, actually and reasonably incurred,
and for judgments, penalties, fines, and amounts paid in settlement actually and
reasonably incurred.

         In the absence of a provision in the articles of incorporation
eliminating or limiting the liability of a director, indemnification from Third
Party Actions or Corporation Actions, unless ordered by the court, shall be made
by the corporation only as authorized in the specific case upon a determination
that indemnification of the director, officer, employee, or agent is proper in
the circumstances because he or she has met the applicable Standard of Conduct
required for Third Party Actions and Corporate Actions and upon an evaluation of
the reasonableness of expenses and amounts paid in settlement.

         If a person is entitled to indemnification under the provisions
relating to either a Third Party Action or a Corporate Action for a portion of
expenses, including reasonable attorneys' fees, judgments, penalties, fines, and
amounts paid in settlement, but not for the total amount, the corporation may
indemnify the person for the portion of the expenses, judgments, penalties,
fines, or amounts paid in settlement for which the person is entitled to be
indemnified.

         The determination of the propriety of indemnification and evaluations
of the reasonableness of expenses and settlement shall be made in any of the
following ways: (a) by a majority vote of a quorum of the board consisting of
directors who are not parties or threatened to be made parties to the action,
suit, or proceeding, or (b) if a quorum cannot be obtained under subdivision
(a), by majority vote of a committee duly designated by the board and consisting
solely of two or more directors not at the time parties or threatened to be made
parties to the action, suit, or proceeding, or (c) by independent legal counsel
in a written opinion, which counsel shall be selected pursuant to the terms and
conditions of the MBCA, or (d) by all independent directors who are not parties
or threatened to be made parties to the action, suit, or proceeding, or (e) by
the shareholders, but shares held by directors, officers, employees, or agents
who are parties or threatened to be made parties to the action, suit, or
proceeding may not be voted.

         An authorization of payment of indemnification shall be made in any of
the following ways:

         (a) by the board in one of the following ways:

             (i) if there are two or more directors who are not parties or
             threatened to be made parties to the action, suit, or proceeding,
             by a majority vote of all directors who are not parties or
             threatened to be made parties, a majority of whom shall constitute
             a quorum for this purpose, (ii) by a majority of the members of a
             committee of two or more directors who are not parties or
             threatened to be made parties to the action, suit, or proceeding,
             (iii) if the corporation has 1 or more independent directors who
             are not parties or threatened to be made parties to the action,
             suit, or proceeding, by a majority vote of all independent
             directors who are not parties or are threatened to be made parties,
             a majority of whom shall constitute a quorum for this purpose, (iv)
             if there are no independent directors and less than two directors
             who are not parties or threatened to be made parties to the action,
             suit, or proceeding, by the vote necessary for action by the board
             in accordance with the MBCA, in which authorization all directors
             may participate.

         (b) by the shareholders, but shares held by directors, officers,
employees, or agents who are parties or threatened to be made parties to the
action, suit, or proceeding may not be voted on the authorization.

         6.  Payment or Reimbursement of Reasonable Expenses Prior to Final
             Disposition of Proceedings.

         A corporation may pay or reimburse the reasonable expenses incurred by
a director, officer, employee, or agent who is a party or threatened to be made
a party to an action, suit, or proceeding in advance of final disposition of the
proceeding if both of the following apply: (a) the person furnishes the
corporation a written affirmation of his or her good faith belief that he or she
has met the applicable Standard of Conduct required for Third Party Actions and
Corporation Actions, and (b) the person furnishes the corporation a written
undertaking, executed personally or on his or her behalf, to repay the advance
if it is ultimately determined that he or she did not meet the applicable
Standard of Conduct

                                       4
5
required for Third Party Actions and Corporation Actions. The undertaking must
be an unlimited general obligation of the person but need not be secured and may
be accepted without reference to the financial ability of the person to make
repayment.

         Determinations and evaluations shall be made in the same manner as
described in paragraph 5 above.

         A provision in the articles of incorporation or bylaws, a resolution of
the board or shareholders, or an agreement making indemnification mandatory
shall also make the advancement of expenses mandatory unless the provision,
resolution, or agreement specifically provides otherwise.

         7.       Statutory Indemnification or Advancement of Expenses is Not
                  Exclusive.

         The indemnification or advancement of expenses provided under the MBCA
is not exclusive of other rights to which a person seeking indemnification or
advancement of expenses may be entitled under the articles of incorporation,
bylaws, or a contractual agreement. The total amount of expenses advanced or
indemnified from all sources combined shall not exceed the amount of actual
expenses incurred by the person seeking indemnification or advancement of
expenses. The indemnification provided for in the MBCA continues as to a person
who ceases to be a director, officer, employee, or agent and shall inure to the
benefit of the heirs, personal representatives, and administrators of the
person.

         8.       Liability Insurance.

         A corporation may purchase and maintain insurance on behalf of any
person who is or was a director, officer, employee, or agent of the corporation,
or who is or was serving at the request of the corporation as a director,
officer, partner, trustee, employee, or agent of another corporation,
partnership, joint venture, trust, or other enterprise against any liability
asserted against him or her and incurred by him or her in any such capacity or
arising out of his or her status as such, whether or not the corporation would
have power to indemnify him or her against liability under other provisions of
the MBCA.

         B.       Company's Articles of Incorporation

         The Company's Articles of Incorporation provide that a director of the
Company shall not be personally liable to the Company or its shareholders for
monetary damages for a breach of the director's fiduciary duty, except in the
event of any of the following: (i) a breach of the director's duty of loyalty to
the Company or its shareholders, (ii) acts or omissions not in good faith or
that involve intentional misconduct or a knowing violation of the law, (iii)
approval of certain wrongful acts, (iv) a transaction from which the director
derived an improper benefit, (v) acts or omissions occurring before May 8, 1996.

         C.       Company's Bylaws

         Article VI of the Company's Bylaws provides for indemnification of
directors and officers and permits indemnification of other parties, as follows:

         SECTION 1. THIRD PARTY ACTIONS. The Company shall indemnify any person
who was or is a party or is threatened to be made a party to a threatened,
pending or completed action, suit or proceeding, whether civil, criminal,
administrative or investigative and whether formal or informal (other than an
action by or in the right of the corporation) by reason of the fact that he is
or was a director, officer, employee or agent of the Company, or is or was
serving at the request of the Company as a director, officer, partner, trustee,
employee or agent of another foreign or domestic corporation, partnership, joint
venture, trust or other enterprise, whether for profit or not, against expenses
(including attorneys' fees), judgments, penalties, fines and amounts paid in
settlement actually and reasonably incurred by him in connection with the
action, suit or proceeding if he acted in good faith and in a manner he
reasonably believed to be in or not opposed to the best interests of the
corporation or its shareholders, and with respect to a criminal action or
proceeding, if such person had no reasonable cause to believe his conduct was
unlawful. The termination of any action, suit or proceeding by judgment, order,
settlement, conviction, or upon a plea of nolo contendere or its equivalent,
shall not, of itself, create a presumption that the person did not act in good
faith and in a manner which he reasonably believed to be in or not

                                       5
6

opposed to the best interests of the corporation or its shareholders, and, with
respect to any criminal action or proceeding, had reasonable cause to believe
that his conduct was unlawful.

         SECTION 2. ACTIONS IN THE RIGHT OF THE CORPORATION. The Company shall
indemnify a person who was or is a party to or is threatened to be made a party
to a threatened, pending or completed action or suit by or in the right of the
Company to procure a judgment in its favor by reason of the fact that he is or
was a director, officer, employee or agent of the corporation, or is or was
serving at the request of the Company as a director, officer, partner, trustee,
employee or agent of another foreign or domestic corporation, partnership, joint
venture, trust or other enterprise, whether for profit or not, against expense
(including actual and reasonable attorneys' fees) and amounts paid in settlement
incurred by him in connection with the action or suit if he acted in good faith
and in a manner he reasonably believed to be in or not opposed to the best
interests of the corporation or its shareholders.

         However, indemnification shall not be made for a claim, issue or matter
as to which such person has been found liable to the Company unless and only to
the extent that the court in which the action or suit was brought has determined
upon application that, despite the adjudication of liability but in view of all
circumstances of the case, such person is fairly and reasonably entitled to
indemnification for the expenses which the court considers proper.

         SECTION 3. MANDATORY AND PERMISSIVE PAYMENTS. To the extent that a
director, officer, employee, or agent of a corporation has been successful on
the merits or otherwise in defense of an action, suit, or proceeding referred to
in Sections 1 or 2 of Article VI, or in defense of any claim, issue, or matter
in the action, suit, or proceeding, he shall be indemnified against expenses
(including actual and reasonable attorneys' fees), incurred by him in connection
with the action, suit, or proceeding and an action, suit, or proceeding brought
to enforce the mandatory indemnification provided hereby.

         Any indemnification under Sections 1 or 2 of Article VI, unless ordered
by a court, shall be made by the Company only as authorized in the specific case
upon a determination that indemnification of the director, officer, employee or
agent is proper in the circumstances because he has met the applicable standard
of conduct set forth in Sections 1 and 2 of Article VI. Such determination shall
be made in any of the following ways: (a) by a majority vote of a quorum of the
board consisting of directors who were not parties to the action, suit, or
proceeding, or (b) if such quorum is not obtainable, then by a majority vote of
a committee of directors who are not parties to the action, suit or proceeding.
The committee shall consist of not less than 2 disinterested directors, or, (c)
by independent legal counsel in a written opinion, or (d) by the shareholders.

         If a person is entitled to indemnification under Sections 1 or 2 of
Article VI for a portion of expenses, including reasonable attorneys' fees,
judgments, penalties, fines, and amounts paid in settlement, but not for the
total amount, the corporation may indemnify the person for the portion of the
expenses, judgments, penalties, fines, or amounts paid in settlement for which
the person is entitled to be indemnified.

         SECTION 4. EXPENSE ADVANCES. Expenses incurred in defending a civil or
criminal action, suit or proceeding described in Sections 1 and 2 of Article VI
may be paid by the Company in advance of the final disposition of the action,
suit or proceeding upon receipt of an undertaking by or on behalf of the
director officer, employee or agent to repay the expenses if it is ultimately
determined that he is not entitled to be indemnified by the Company. The
undertaking shall be by an unlimited general obligation of the person on whose
behalf advances are made but need not be secured.

         SECTION 5. VALIDITY OF PROVISIONS. A provision made to indemnify
directors or officers of any action, suit or proceeding referred to in Sections
1 and 2 of Article VI whether contained in the articles of incorporation, the
bylaws, a resolution of shareholders or directors, an agreement or otherwise,
shall be invalid only insofar as it is in conflict with Sections 1 to 5 of
Article VI. The indemnification provided in Sections 1 to 5 of Article VI
continues as to a person who has ceased to be a director, officer, employee or
agent and shall inure to the benefit of the heirs, executors and administrators
of such person.

         SECTION 6. INSURANCE. The Company may purchase and maintain insurance
on behalf of any person who is or was a director, officer, employee or agent of
the Company, or is or was serving at

                                       6
7

the request of the Company as a director, officer, employee or agent of another
corporation, partnership, joint venture, trust or other enterprise against any
liability asserted against him and incurred by him in any such capacity or
arising out of his status as such, whether or not the Company would have the
power to indemnify him against such liability under sections 1 to 5 of Article
VI.

         SECTION 8. NONEXCLUSIVITY. The indemnification or advancement of
expenses provided in Article VI is not exclusive of other rights to which a
person seeking indemnification or advancement of expenses may be entitled under
the Company's articles of incorporation or a contractual agreement. However, the
total amount of expenses advanced or indemnified from all sources combined shall
not exceed the amount of actual expenses incurred by the person seeking
indemnification or advancement of expenses.

ITEM 7.  EXEMPTION FROM REGISTRATION.

Not applicable.

ITEM 8.  EXHIBITS.

The following documents are attached hereto or incorporated herein by reference
as exhibits to this Registration Statement:

Exhibit Number             Description of Document

4(a)                       Restated Articles of Incorporation of United Bancorp,
                           Inc., filed as Exhibit (4)(a) to registrant's
                           registration statement on Form S-8 (File Number
                           333-03305) dated May 8, 1996, and incorporated herein
                           by reference.

4(b)                       Bylaws of United Bancorp, Inc., filed as Exhibit
                           (4)(b) to the Company's registration statement on
                           Form S-8 (File Number 333-3305) dated May 8, 1996,
                           and incorporated herein by reference.

4(c)                       United Bancorp, Inc. 1999 Stock Option Plan, filed as
                           Appendix B to the Company's Definitive 14A Proxy
                           Statement dated March 24, 2000 and incorporated
                           herein by reference.

5                          Opinion and Consent of Bodman, Longley, LLP as to the
                           legality of the securities being registered.

23(a)                      Consent of Crowe, Chizek and Company LLP, independent
                           auditors.

23(b)                      Consent of Bodman, Longley, & Dahling, LLP, legal
                           counsel (contained in Exhibit 5).

24                         Powers of Attorney (contained in the signature pages
                           of this Registration Statement).

ITEM 9.  UNDERTAKINGS.

A.       The undersigned Registrant hereby undertakes:

         (1)      To file, during any period in which offers or sales are being
                  made, a post-effective amendment to this Registration
                  Statement:

                  (i)      To include any prospectus required by Section
                           10(a)(3) of the Securities Act of 1933;

                  (ii)     To reflect in the prospectus any facts or events
                           arising after the effective date of the Registration
                           Statement (or the most recent post-effective
                           amendment thereof) which, individually or in the
                           aggregate, represent a fundamental change in the
                           information set forth in the Registration Statement;

                                       7
8

                  (iii)    To include any material information with respect to
                           the plan of distribution not previously disclosed in
                           the Registration Statement or any material change to
                           such information in the Registration Statement;

                  Provided, however that paragraphs A(1)(i) and A(1)(ii) shall
                  not apply if the information required to be included in a
                  post-effective amendment by those paragraphs is contained in
                  periodic reports filed by the Registrant pursuant to Section
                  13 or Section 15(d) of the Securities Exchange Act of 1934
                  that are incorporated by reference in the Registration
                  Statement.

         (2)      That, for the purpose of determining any liability under the
                  Securities Act of 1933, each such post-effective amendment
                  shall be deemed to be a new Registration Statement relating to
                  the securities offered therein, and the offering of such
                  securities at that time shall be deemed to be the initial bona
                  fide offering thereof.

         (3)      To remove from registration by means of a post-effective
                  amendment any of the securities being registered which remain
                  unsold at the termination of the offering.

(B)      The undersigned Registrant hereby undertakes that, for purposes of
         determining any liability under the Securities Act of 1933, each filing
         of the Registrant's annual report pursuant to Section 13(a) or Section
         15(d) of the Securities Exchange Act of 1934 (and, where applicable,
         each filing of an employee benefit plan's annual report pursuant to
         Section 15(d) of the Securities Exchange Act of 1934) that is
         incorporated by reference in this Registration Statement shall be
         deemed to be a new registration statement relating to the securities
         offered herein, and the offering of such securities at that time shall
         be deemed to be the initial bona fide offering thereof.

(C)      Insofar as indemnification for liabilities arising under the Securities
         Act of 1933 may be permitted to directors, officers and controlling
         persons of the Registrant pursuant to the foregoing provisions, or
         otherwise, the Registrant has been advised that in the opinion of the
         Securities and Exchange Commission such indemnification is against
         public policy as expressed in the Act and is, therefore, unenforceable.
         In the event that a claim for indemnification against such liabilities
         (other than the payment by the Registrant of expenses incurred or paid
         by a director, officer or controlling person of the Registrant in the
         successful defense of any action, suit or proceeding) is asserted by
         such director, officer or controlling person in connection with the
         securities being registered, the Registrant will, unless in the opinion
         of its counsel the matter has been settled by controlling precedent,
         submit to a court of appropriate jurisdiction the question whether such
         indemnification by it is against public policy as expressed in the Act
         and will be governed by the final adjudication of such issue.

                                   SIGNATURES

The Registrant. Pursuant to the requirements of the Securities Act of 1933, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing of Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Tecumseh, State of Michigan on February 14, 2001.

                                        UNITED BANCORP, INC.

                                        By: /s/ David S. Hickman
                                           -------------------------------
                                            David S. Hickman,
                                            Chairman and Chief Executive Officer

                                       8
9

Pursuant to the requirements of the Securities Act of 1933, this Registration
Statement has been signed below on February 14, 2001, by the following persons
in the capacities indicated below. By so signing, each of the undersigned, in
his capacity as a director or officer, or both, as the case may be, of the
Registrant, does hereby appoint David S. Hickman and Dale L. Chadderdon, and
each of them severally, his or her true and lawful attorney to execute in his or
her name, place and stead, in his or her capacity as a director or officer, or
both, as the case may be, of the Registrant, any and all amendments to this
Registration Statement and post-effective amendments thereto (including
prospectus supplements) and all instruments necessary or incidental in
connection therewith, and to file the same with the Securities and Exchange
Commission. Each of said attorneys shall have full power and authority to do and
perform in the name and on behalf of each of the undersigned, in any and all
capacities, every act whatsoever requisite or necessary to be done in the
premises as fully, and for all intents and purposes, as each of the undersigned
might or could do in person, the undersigned hereby ratifying and approving the
acts of said attorneys and each of them.
/s/ David S. Hickman                                             /s/ Dale L. Chadderdon
---------------------------------------------------------         ----------------------------------------------------
David S. Hickman, Chairman, Chief Executive Officer and           Dale L. Chadderdon, Senior Vice President,
Director (principal executive officer)                            Secretary and Treasurer (principal financial and
                                                                  accounting officer)

        /s/ John J. Wanke                                               /s/   Ann Hilsdale Knisel
---------------------------------------------------------         ----------------------------------------------------
John J. Wanke, President, Chief Operating Officer and             Ann Hinsdale Knisel, Director
Director

       /s/ David N. Berlin                                              /s/   Jeffrey A. Kuhman
---------------------------------------------------------         ----------------------------------------------------
David N. Berlin, Director                                         Jeffrey A. Kuhman, Director

      /s/ L. Donald Bush                                                /s/   James C. Lawson
---------------------------------------------------------         ----------------------------------------------------
L. Donald Bush, Director                                          James C. Lawson, Director

      /s/ Joseph D. Butcko                                              Donald J. Martin
---------------------------------------------------------         ----------------------------------------------------
Joseph D. Butcko, Director                                        Donald J. Martin, Director

      /s/ Patrick D. Farver
---------------------------------------------------------         ----------------------------------------------------
Patrick D. Farver, Director                                       David E Maxwell, Director

      /s/ John H. Foss                                                  /s/   Kathryn M. Mohr
---------------------------------------------------------         ----------------------------------------------------
John H. Foss, Director                                            Kathryn M. Mohr, Director

      /s/ Richard A. Gurdjian
---------------------------------------------------------         ----------------------------------------------------
Richard A. Gurdjian, Director                                     Richard R. Niethammer, Director

      /s/ Scott F. Hill                                                 /s/   John R. Robertstad
---------------------------------------------------------         ----------------------------------------------------
Scott F. Hill, Director                                           John R. Robertstad, Director
9
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                                  EXHIBIT INDEX

Exhibit Number                              Description of Document

4(a)                       Restated Articles of Incorporation of United Bancorp,
                           Inc., filed as Exhibit (4)(a) to registrant's
                           registration statement on Form S-8 (File Number
                           333-03305) dated May 8, 1996, and incorporated herein
                           by reference.

4(b)                       Bylaws of United Bancorp, Inc., filed as Exhibit
                           (4)(b) to the Company's registration statement on
                           Form S-8 (File Number 333-3305) dated May 8, 1996,
                           and incorporated herein by reference.

4(c)                       United Bancorp, Inc. 1999 Stock Option Plan, filed as
                           Appendix B to the Company's Definitive 14A Proxy
                           Statement dated March 24, 2000 and incorporated
                           herein by reference.

5                          Opinion and Consent of Bodman, Longley, LLP as to the
                           legality of the securities being registered.

23(a)                      Consent of Crowe, Chizek and Company LLP, independent
                           auditors.

23(b)                      Consent of Bodman, Longley, & Dahling, LLP, legal
                           counsel (contained in Exhibit 5).

24                         Powers of Attorney (contained in the signature pages
                           of this Registration Statement).

                                       10