<PAGE>   1
         As Filed with the Securities and Exchange Commission on August 27, 1999

                                                       Registration No. 333-
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      Under
                           The Securities Act of 1933

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

                               WEST COAST BANCORP
               (Exact name of issuer as specified on its charter)

             OREGON                                93-0810577
(State or other jurisdiction of                  (I.R.S. employer
incorporation or organization)                  identification no.)


                          5335 MEADOWS ROAD, SUITE 201
                            LAKE OSWEGO, OREGON 97035
                    (Address of principal executive offices)

                             1999 STOCK OPTION PLAN
                            (Full title of each plan)

                                    Please send copies of all communications to:

DONALD A. KALKOFEN                                    STEPHEN M. KLEIN, ESQ.
Executive President and Chief Financial Officer       Graham & Dunn, P.C.
West Coast Bancorp                                    1420 Fifth Avenue
5335 Meadows Road, Suite 201                          33rd Floor
Lake Oswego, Oregon  97035                            Seattle, Washington  98101
(503) 684-0884                                        (206) 340-9648

               (Name, address including zip code, telephone number
                   including area code, of agent for service)


                                       1
<PAGE>   2

                         CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>
                  ------------------------------------------------------------------------------
                                                                         Proposed
                                                 Proposed maximum        maximum
Title of                  Amount                 offering                aggregate              Amount of
securities to be          to be                  price                   offering               registration
registered                registered             per share (1)           price (1)              fee
----------                -----------            -------------           ---------              ---

<S>                       <C>                    <C>                     <C>                    <C>
Common shares,            1,500,000(2)           $31.34                  $47,010,000            $13,093.00
no par value
                  ------------------------------------------------------------------------------
</TABLE>

Notes:

1.   Estimated solely for the purpose of calculating the amount of the
     registration fee. Pursuant to Rule 457(c) under the Securities Act of 1933,
     as amended ("Securities Act"), the price per share is estimated to be
     $31.34 based upon the average of the high ($31.44) and the low ($31.25)
     trading prices of the common stock, no par value per share ("Common Stock")
     of West Coast Bancorp (the "Registrant") as reported on the Nasdaq Stock
     Market on August 25, 1999.

2.   Shares of Registrant's Common Stock issuable upon exercise of option
     outstanding under the 1999 Stock Option Plan (the "Plan"), together with an
     indeterminate number of additional shares which may be necessary to adjust
     the number of shares reserved for issuance under the Plan as a result of
     any future stock split, stock dividend or similar adjustment of the
     outstanding Common Stock, as provided in Rule 416(a) under the Securities
     Act.


                                       2
<PAGE>   3

             PART II. INFORMATION REQUIRED IN REGISTRATION STATEMENT

ITEM 3.  INCORPORATION OF DOCUMENTS BY REFERENCE.

         The documents listed below are incorporated by reference in the
Registration Statement. In addition, all documents subsequently filed by
Registrant pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Securities
Exchange Act of 1934, as amended ("Exchange Act") prior to Registrant's filing
of a post-effective amendment 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 into this Registration Statement and to
be a part hereof from the date of filing of such documents.

         (a) The Registrant's Annual Report on Form 10-K for the fiscal year
ended December 31, 1998, filed pursuant to Section 13(a) or 15(d) of the
Exchange Act, which contains audited financial statements for the most recent
fiscal year for which such statements have been filed.

         (b) All other reports filed pursuant to Section 13(a) or 15(d) of the
Exchange Act since the end of the fiscal year covered by the Annual Report on
Form 10-K referred to in (a) above.

         (c) The description of the Common Shares contained in the Registrant's
Prospectus/Joint Proxy Statement dated January 12, 1998 and included in the
Registrant's Registration Statement on Form S-4 (Registration No. 333-43083),
including any amendments or reports filed for the purpose of updating such
description.

ITEM 4.  DESCRIPTION OF SECURITIES.

         Not applicable.

ITEM 5.  INTERESTS OF NAMED EXPERTS AND COUNSEL.

         The validity of the shares offered pursuant to the Plan will be passed
upon by Graham & Dunn, PC, 1420 Fifth Avenue, 33rd Floor, Seattle, Washington
98101.

ITEM 6.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

         The Registrant's Articles of Incorporation provide for indemnification,
to the fullest extent permissible under the Oregon Business Corporation Act (the
"OBCA"), of its directors against all expense, liability, and loss (including
attorneys' fees) incurred by him or her by reason of or arising from the fact
that he or she is or was a director of the Registrant or is or was serving at
Registrant's request as a director, officer, partner, trustee, employee, or
agent of another foreign or domestic corporation, partnership, joint venture,
trust, employee benefit plan, or other enterprise, and these indemnification
rights continue as to a person who has ceased to be a director, officer,
partner, trustee, employee, or agent and inure to the benefit of his or her
heirs, executors, and administrators. Registrant's Articles of Incorporation
authorize Registrant, through its Bylaws, and the Registrant's Board to provide
indemnification to Registrant's officers, employees, and agents, to the extent


                                       3
<PAGE>   4

permitted by law. Registrant's Bylaws provide that Registrant will indemnify its
directors and officers to the full extent permitted by the OBCA. However,
Registrant will not provide indemnification when (1) a director or officer
commits intentional misconduct or knowingly violates the law; (2) a director or
officer is adjudged liable to Registrant in a proceeding by or in the right of
Registrant; or (3) a director or officer is adjudged liable in any proceeding
charging improper personal benefit on the basis that the director or officer
improperly received a personal benefit. Indemnification rights and procedures,
including entitlements to advanced expenses, are set forth in more detail in
Registrant's Bylaws.

         The Articles permit the Registrant to provide further indemnification
rights to its directors, officers, employees, and agents as permitted by law.
The Registrant has provided such additional indemnification rights to its
directors, officers, employees, and agents in the Bylaws, and in indemnification
agreements entered into with certain of its directors and officers.

         The effect of these provisions is potentially to indemnify the
Registrant's directors from all costs and expenses of liability incurred by them
in connection with any action, suit or proceeding in which they are involved by
reason of their affiliation with the Registrant.

ITEM 7.  EXEMPTION FROM REGISTRATION CLAIMED.

         Not applicable.


                                       4
<PAGE>   5

ITEM 8.  EXHIBITS.

<TABLE>
<CAPTION>
 Exhibit
 Number                         Description
 -------                        -----------
<S>       <C>
  5.1     Opinion of Graham & Dunn, P.C.,  Registrant's  legal counsel,
          regarding legality of the Common Stock being registered.
  23.1    Consent of Graham & Dunn (included in Exhibit 5.1).
  23.2    Consent of Arthur Andersen LLP.
  23.3    Consent of Dwyer Pemberton LLP
  24.1    Powers of Attorney (see the Signature Page )
  99.1    1999 Stock Option Plan.
  99.2    Form of Stock Option Agreement
</TABLE>


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;

             (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. Notwithstanding the foregoing, any increase or decrease in volume of
securities offered (if the total dollar value of securities offered would not
exceed that which was registered) and any deviation from the low or high end of
the estimated maximum offering range may be reflected in the form of prospectus
filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the
changes in volume and price represent no more than a 20% change in the maximum
aggregate offering price set forth in the "Calculation of Registration Fee"
table in the effective Registration Statement;

             (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)
of this section do not apply if the Registration Statement is on Form S-3, Form
S-8 or Form F-3, and the information required to be included in a post-effective
amendment by those paragraphs is contained in periodic reports filed with or
furnished to the Commission by the Registrant pursuant to Section 13 or


                                       5
<PAGE>   6

Section 15(d) of the Securities Exchange Act that are incorporated by reference
in the Registration Statement.

             (2) That, for the purpose of determining any liability under the
Securities Act, 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, each filing of the
Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Exchange Act (and, where applicable, each filing of an employee benefit plan's
annual report pursuant to Section 15(d) of the Exchange Act) that is
incorporated by reference in the Registration Statement 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.

         C. Insofar as indemnification for liabilities arising under the
Securities Act 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 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 of 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.


                                       6
<PAGE>   7

                                   SIGNATURES

         Pursuant to the requirements of the Securities Act, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on 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 Lake Oswego, State of Oregon, on the 25th day of
August, 1999.

                            WEST COAST BANCORP


                            By: /s/ Donald A. Kalkofen
                               -----------------------------------------------
                               Donald A. Kalkofen
                               Executive Vice President and Chief Financial
                               Officer

                                POWER OF ATTORNEY

         Each person whose individual signature appears below hereby authorizes
and appoints Ronald T. DeLude and Shauna L. Vernal, and each of them, with full
power of substitution and full power to act without the other, as his or her
true and lawful attorney-in-fact and agent to act in his or her name, place and
stead, and to execute in the name and on behalf of each person, individually and
in each capacity stated below, and to file any and all amendments to this
Registration Statement, including any and all post-effective amendments.

         Pursuant to the requirements of the Securities Act, this Registration
Statement has been signed by the following persons in the capacities indicated,
on the 25th day of August, 1999.


<TABLE>
<CAPTION>
     Signature                                Title
     ---------                                -----

<S>                               <C>
  /s/ Ronald A. DeLude           Acting President and Chief Executive Officer
------------------------------   (Principal Executive Officer)
Ronald A. DeLude


  /s/ Donald A. Kalkofen         Executive Vice President and Chief Financial
------------------------------   Officer
Donald A. Kalkofen               (Principal Financial Officer)


 /s/ Kevin M. McClung            Vice President and Controller
------------------------------   (Principal Accounting Officer)
Kevin M. McClung
</TABLE>


                                       7
<PAGE>   8

<TABLE>
<CAPTION>
<S>                               <C>

   /s/ Lloyd D. Ankeny            Director
------------------------------
Lloyd D. Ankeny

  /s/ Phillip G. Bateman          Director
------------------------------
Phillip G. Bateman

  /s/ Michael J. Bragg            Director
------------------------------
Michael J. Bragg

  /s/ William B. Loch             Director
------------------------------
William B. Loch

  /s/ Jack E. Long                Director
------------------------------
Jack E. Long

  /s/ C. Douglas McGregor         Director
------------------------------
C. Douglas McGregor

  /s/ J. F. Ouderkirk             Director
------------------------------
J. F. Ouderkirk

  /s/ James J. Pomajevich         Director
------------------------------
James J. Pomajevich
</TABLE>


                                       8
<PAGE>   9

                                INDEX OF EXHIBITS


<TABLE>
<CAPTION>
Exhibit
Number                            Description
-------                           -----------
<S>         <C>
  5.1       Opinion of Graham & Dunn, P.C., Registrant's legal counsel,
            regarding legality of the Common Stock being registered.
  23.1      Consent of Graham & Dunn (included in Exhibit 5.1).
  23.2      Consent of Arthur Andersen LLP.
  23.3      Consent of Dwyer, Pemberton
  24.1      Powers of Attorney (see the Signature Page)
  99.1      1999 Stock Option Plan.
  99.2      Form of Stock Option Agreement
</TABLE>





                                        9
[{"type": "S-8", "sequence": "1", "description": "FORM S-8 REGISTRATION STATEMENT", "secsgml_size_bytes": 17197}]
{"company-data": {"conformed-name": "WEST COAST BANCORP /NEW/OR/", "cik": "0000717059", "assigned-sic": "6022", "irs-number": "930810577", "state-of-incorporation": "OR", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-86113", "film-number": "99702108"}, "business-address": {"street1": "5335 SW MEADOWS RD", "street2": "SUITE 201", "city": "LAKE OSWEGO", "state": "OR", "zip": "97035", "phone": "5036840884"}, "mail-address": {"street1": "5335 SW MEADOWS RD", "street2": "SUITE 201", "city": "LAKE OSWEGO", "state": "OR", "zip": "97035"}, "former-company": {"former-conformed-name": "COMMERCIAL BANCORP", "date-changed": "19920703"}}
1
         As Filed with the Securities and Exchange Commission on August 27, 1999

                                                       Registration No. 333-
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      Under
                           The Securities Act of 1933

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

                               WEST COAST BANCORP
               (Exact name of issuer as specified on its charter)

             OREGON                                93-0810577
(State or other jurisdiction of                  (I.R.S. employer
incorporation or organization)                  identification no.)

                          5335 MEADOWS ROAD, SUITE 201
                            LAKE OSWEGO, OREGON 97035
                    (Address of principal executive offices)

                             1999 STOCK OPTION PLAN
                            (Full title of each plan)

                                    Please send copies of all communications to:

DONALD A. KALKOFEN                                    STEPHEN M. KLEIN, ESQ.
Executive President and Chief Financial Officer       Graham & Dunn, P.C.
West Coast Bancorp                                    1420 Fifth Avenue
5335 Meadows Road, Suite 201                          33rd Floor
Lake Oswego, Oregon  97035                            Seattle, Washington  98101
(503) 684-0884                                        (206) 340-9648

               (Name, address including zip code, telephone number
                   including area code, of agent for service)

                                       1
2

                         CALCULATION OF REGISTRATION FEE
------------------------------------------------------------------------------
                                                                         Proposed
                                                 Proposed maximum        maximum
Title of                  Amount                 offering                aggregate              Amount of
securities to be          to be                  price                   offering               registration
registered                registered             per share (1)           price (1)              fee
----------                -----------            -------------           ---------              ---
Common shares,            1,500,000(2)           $31.34                  $47,010,000            $13,093.00
no par value
                  ------------------------------------------------------------------------------
Notes:

1.   Estimated solely for the purpose of calculating the amount of the
     registration fee. Pursuant to Rule 457(c) under the Securities Act of 1933,
     as amended ("Securities Act"), the price per share is estimated to be
     $31.34 based upon the average of the high ($31.44) and the low ($31.25)
     trading prices of the common stock, no par value per share ("Common Stock")
     of West Coast Bancorp (the "Registrant") as reported on the Nasdaq Stock
     Market on August 25, 1999.

2.   Shares of Registrant's Common Stock issuable upon exercise of option
     outstanding under the 1999 Stock Option Plan (the "Plan"), together with an
     indeterminate number of additional shares which may be necessary to adjust
     the number of shares reserved for issuance under the Plan as a result of
     any future stock split, stock dividend or similar adjustment of the
     outstanding Common Stock, as provided in Rule 416(a) under the Securities
     Act.

                                       2
3

             PART II. INFORMATION REQUIRED IN REGISTRATION STATEMENT

ITEM 3.  INCORPORATION OF DOCUMENTS BY REFERENCE.

         The documents listed below are incorporated by reference in the
Registration Statement. In addition, all documents subsequently filed by
Registrant pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Securities
Exchange Act of 1934, as amended ("Exchange Act") prior to Registrant's filing
of a post-effective amendment 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 into this Registration Statement and to
be a part hereof from the date of filing of such documents.

         (a) The Registrant's Annual Report on Form 10-K for the fiscal year
ended December 31, 1998, filed pursuant to Section 13(a) or 15(d) of the
Exchange Act, which contains audited financial statements for the most recent
fiscal year for which such statements have been filed.

         (b) All other reports filed pursuant to Section 13(a) or 15(d) of the
Exchange Act since the end of the fiscal year covered by the Annual Report on
Form 10-K referred to in (a) above.

         (c) The description of the Common Shares contained in the Registrant's
Prospectus/Joint Proxy Statement dated January 12, 1998 and included in the
Registrant's Registration Statement on Form S-4 (Registration No. 333-43083),
including any amendments or reports filed for the purpose of updating such
description.

ITEM 4.  DESCRIPTION OF SECURITIES.

         Not applicable.

ITEM 5.  INTERESTS OF NAMED EXPERTS AND COUNSEL.

         The validity of the shares offered pursuant to the Plan will be passed
upon by Graham & Dunn, PC, 1420 Fifth Avenue, 33rd Floor, Seattle, Washington
98101.

ITEM 6.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

         The Registrant's Articles of Incorporation provide for indemnification,
to the fullest extent permissible under the Oregon Business Corporation Act (the
"OBCA"), of its directors against all expense, liability, and loss (including
attorneys' fees) incurred by him or her by reason of or arising from the fact
that he or she is or was a director of the Registrant or is or was serving at
Registrant's request as a director, officer, partner, trustee, employee, or
agent of another foreign or domestic corporation, partnership, joint venture,
trust, employee benefit plan, or other enterprise, and these indemnification
rights continue as to a person who has ceased to be a director, officer,
partner, trustee, employee, or agent and inure to the benefit of his or her
heirs, executors, and administrators. Registrant's Articles of Incorporation
authorize Registrant, through its Bylaws, and the Registrant's Board to provide
indemnification to Registrant's officers, employees, and agents, to the extent

                                       3
4

permitted by law. Registrant's Bylaws provide that Registrant will indemnify its
directors and officers to the full extent permitted by the OBCA. However,
Registrant will not provide indemnification when (1) a director or officer
commits intentional misconduct or knowingly violates the law; (2) a director or
officer is adjudged liable to Registrant in a proceeding by or in the right of
Registrant; or (3) a director or officer is adjudged liable in any proceeding
charging improper personal benefit on the basis that the director or officer
improperly received a personal benefit. Indemnification rights and procedures,
including entitlements to advanced expenses, are set forth in more detail in
Registrant's Bylaws.

         The Articles permit the Registrant to provide further indemnification
rights to its directors, officers, employees, and agents as permitted by law.
The Registrant has provided such additional indemnification rights to its
directors, officers, employees, and agents in the Bylaws, and in indemnification
agreements entered into with certain of its directors and officers.

         The effect of these provisions is potentially to indemnify the
Registrant's directors from all costs and expenses of liability incurred by them
in connection with any action, suit or proceeding in which they are involved by
reason of their affiliation with the Registrant.

ITEM 7.  EXEMPTION FROM REGISTRATION CLAIMED.

         Not applicable.

                                       4
5

ITEM 8.  EXHIBITS.
Exhibit
 Number                         Description
 -------                        -----------
5.1     Opinion of Graham & Dunn, P.C.,  Registrant's  legal counsel,
          regarding legality of the Common Stock being registered.
  23.1    Consent of Graham & Dunn (included in Exhibit 5.1).
  23.2    Consent of Arthur Andersen LLP.
  23.3    Consent of Dwyer Pemberton LLP
  24.1    Powers of Attorney (see the Signature Page )
  99.1    1999 Stock Option Plan.
  99.2    Form of Stock Option Agreement
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;

             (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. Notwithstanding the foregoing, any increase or decrease in volume of
securities offered (if the total dollar value of securities offered would not
exceed that which was registered) and any deviation from the low or high end of
the estimated maximum offering range may be reflected in the form of prospectus
filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the
changes in volume and price represent no more than a 20% change in the maximum
aggregate offering price set forth in the "Calculation of Registration Fee"
table in the effective Registration Statement;

             (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)
of this section do not apply if the Registration Statement is on Form S-3, Form
S-8 or Form F-3, and the information required to be included in a post-effective
amendment by those paragraphs is contained in periodic reports filed with or
furnished to the Commission by the Registrant pursuant to Section 13 or

                                       5
6

Section 15(d) of the Securities Exchange Act that are incorporated by reference
in the Registration Statement.

             (2) That, for the purpose of determining any liability under the
Securities Act, 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, each filing of the
Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Exchange Act (and, where applicable, each filing of an employee benefit plan's
annual report pursuant to Section 15(d) of the Exchange Act) that is
incorporated by reference in the Registration Statement 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.

         C. Insofar as indemnification for liabilities arising under the
Securities Act 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 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 of 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.

                                       6
7

                                   SIGNATURES

         Pursuant to the requirements of the Securities Act, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on 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 Lake Oswego, State of Oregon, on the 25th day of
August, 1999.

                            WEST COAST BANCORP

                            By: /s/ Donald A. Kalkofen
                               -----------------------------------------------
                               Donald A. Kalkofen
                               Executive Vice President and Chief Financial
                               Officer

                                POWER OF ATTORNEY

         Each person whose individual signature appears below hereby authorizes
and appoints Ronald T. DeLude and Shauna L. Vernal, and each of them, with full
power of substitution and full power to act without the other, as his or her
true and lawful attorney-in-fact and agent to act in his or her name, place and
stead, and to execute in the name and on behalf of each person, individually and
in each capacity stated below, and to file any and all amendments to this
Registration Statement, including any and all post-effective amendments.

         Pursuant to the requirements of the Securities Act, this Registration
Statement has been signed by the following persons in the capacities indicated,
on the 25th day of August, 1999.
Signature                                Title
     ---------                                -----
/s/ Ronald A. DeLude           Acting President and Chief Executive Officer
------------------------------   (Principal Executive Officer)
Ronald A. DeLude

  /s/ Donald A. Kalkofen         Executive Vice President and Chief Financial
------------------------------   Officer
Donald A. Kalkofen               (Principal Financial Officer)

 /s/ Kevin M. McClung            Vice President and Controller
------------------------------   (Principal Accounting Officer)
Kevin M. McClung
7
8
/s/ Lloyd D. Ankeny            Director
------------------------------
Lloyd D. Ankeny

  /s/ Phillip G. Bateman          Director
------------------------------
Phillip G. Bateman

  /s/ Michael J. Bragg            Director
------------------------------
Michael J. Bragg

  /s/ William B. Loch             Director
------------------------------
William B. Loch

  /s/ Jack E. Long                Director
------------------------------
Jack E. Long

  /s/ C. Douglas McGregor         Director
------------------------------
C. Douglas McGregor

  /s/ J. F. Ouderkirk             Director
------------------------------
J. F. Ouderkirk

  /s/ James J. Pomajevich         Director
------------------------------
James J. Pomajevich
8
9

                                INDEX OF EXHIBITS
Exhibit
Number                            Description
-------                           -----------
5.1       Opinion of Graham & Dunn, P.C., Registrant's legal counsel,
            regarding legality of the Common Stock being registered.
  23.1      Consent of Graham & Dunn (included in Exhibit 5.1).
  23.2      Consent of Arthur Andersen LLP.
  23.3      Consent of Dwyer, Pemberton
  24.1      Powers of Attorney (see the Signature Page)
  99.1      1999 Stock Option Plan.
  99.2      Form of Stock Option Agreement
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