<PAGE>
                SECURITIES AND EXCHANGE COMMISSION
                      Washington, D.C. 20549


                             FORM 8-K


                          CURRENT REPORT



              Pursuant to Section 13 or 15(d) of the
                 Securities Exchange Act of 1934


                          PENNFIRST BANCORP, INC.                 
             ----------------------------------------------    

       (Exact name of registrant specified in its charter)




     Pennsylvania                       0-19345              25-1659846
--------------------                --------------        -----------------
(State or other jurisdiction    (Commission File Number)  (I.R.S. Employer
incorporation or organization)                           Identification Number)




600 Lawrence Avenue
Ellwood City, Pennsylvania                                       16117      
----------------------------------------                   ------------------
(Address of principal executive offices)                       (Zip Code)











                                                                  
                                        (724) 758-5584
-------------------------------------------------------------------------------
            (Registrant's telephone number, including area code)
<PAGE>
PennFirst Bancorp, Inc.
Form 8-K
Page 2

ITEM 5.   OTHER EVENTS

     The information to be reported herein is incorporated by reference from
the press release, dated April 21, 1998, filed as Exhibit 99 to this Form 8-K.

ITEM 7.   FINANCIAL STATEMENTS AND EXHIBITS

               (a)  Not applicable.

               (b)  Not applicable.

               (c)  Exhibits.

                    99   Press release dated April 21, 1998.

<PAGE>
PennFirst Bancorp, Inc.
Form 8-K
Page 3

                            SIGNATURES
                           ------------
     Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.


                                        PENNFIRST BANCORP, INC.
                                             (Registrant)



Date: April 22, 1998                  By: /s/ Charlotte A. Zuschlag
      --------------                      -------------------------------
                                          Charlotte A. Zuschlag
                                          President and Chief Executive Officer
                                          (Principal Executive Officer)


<PAGE>
[{"type": "8-K", "sequence": "1", "description": "8-K", "secsgml_size_bytes": 2573}]
{"company-data": {"conformed-name": "PENNFIRST BANCORP INC", "cik": "0000872835", "assigned-sic": "6035", "irs-number": "251659846", "state-of-incorporation": "PA", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-19345", "film-number": "98600447"}, "business-address": {"street1": "600 LAWRENCE AVE", "city": "ELLWOOD CITY", "state": "PA", "zip": "16117", "phone": "4127585584"}}
SECURITIES AND EXCHANGE COMMISSION
                      Washington, D.C. 20549

                             FORM 8-K

                          CURRENT REPORT

              Pursuant to Section 13 or 15(d) of the
                 Securities Exchange Act of 1934

                          PENNFIRST BANCORP, INC.                 
             ----------------------------------------------    

       (Exact name of registrant specified in its charter)

     Pennsylvania                       0-19345              25-1659846
--------------------                --------------        -----------------
(State or other jurisdiction    (Commission File Number)  (I.R.S. Employer
incorporation or organization)                           Identification Number)

600 Lawrence Avenue
Ellwood City, Pennsylvania                                       16117      
----------------------------------------                   ------------------
(Address of principal executive offices)                       (Zip Code)

                                                                  
                                        (724) 758-5584
-------------------------------------------------------------------------------
            (Registrant's telephone number, including area code)
PennFirst Bancorp, Inc.
Form 8-K
Page 2

ITEM 5.   OTHER EVENTS

     The information to be reported herein is incorporated by reference from
the press release, dated April 21, 1998, filed as Exhibit 99 to this Form 8-K.

ITEM 7.   FINANCIAL STATEMENTS AND EXHIBITS

               (a)  Not applicable.

               (b)  Not applicable.

               (c)  Exhibits.

                    99   Press release dated April 21, 1998.
PennFirst Bancorp, Inc.
Form 8-K
Page 3

                            SIGNATURES
                           ------------
     Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                        PENNFIRST BANCORP, INC.
                                             (Registrant)

Date: April 22, 1998                  By: /s/ Charlotte A. Zuschlag
      --------------                      -------------------------------
                                          Charlotte A. Zuschlag
                                          President and Chief Executive Officer
                                          (Principal Executive Officer)