<PAGE>

                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                   FORM 10-Q/A

[X]   QUARTERLY REPORT UNDER SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT
      OF 1934

For the quarterly period ended March 31, 2005

[ ]   TRANSITION REPORT UNDER SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE
      ACT OF 1934

For the transition period from ______________ to _____________

Commission file number 0-19028

                               CCFNB BANCORP, INC.
                 (Name of small business Issuer in its charter)

PENNSYLVANIA                                          23-2254643
(State or other jurisdiction of                       (I.R.S. Employer
incorporation or organization)                        Identification Number)

232 East Street, Bloomsburg, PA                       17815
(Address of principal executive offices)              (Zip Code)

Issuer's telephone number, including area code:       (570) 784-4400

         Check whether the issuer (1) filed all reports required to be filed by
Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding
12 months (or for such shorter period that the issuer was required to file such
reports), and (2) has been subject to such filing requirings for the past 90
days. Yes [X] No [ ]

      Indicate the number of shares outstanding of each of the issuer's classes
of common stock, as of the latest practicable date. 1,264,067 shares of $1.25
(par) common stock were outstanding as of April 26, 2005.

                                       1

<PAGE>

                               CCFNB BANCORP, INC.
                         AMENDMENT TO FORM 10-Q FOR THE
                      QUARTERLY PERIOD ENDED MARCH 31, 2005

This amendment is the result of a staff review of our Form 10-K for the year
ended December 31, 2004 and this report on 10-Q by the Division of Corporation
finance which requested clarification of the date of the evaluation of the
effectiveness of disclosure controls and procedures. The staff review requested
that we revise our discussion of controls and procedures for our quarterly
report for the period ended 31 March 2005. Accordingly, this amendment contains
a revision to our disclosure, relating to controls and procedures.

                                       2

<PAGE>

CCFNB BANCORP, INC. AND SUBSIDIARY
INDEX 10-Q
MARCH 31, 2005
_______________________________________________________________________________

<TABLE>
<CAPTION>
                                                                            Page
                                                                            ----
<S>                                                                         <C>
Part I FINANCIAL INFORMATION:

Controls and Procedures                                                       4

SIGNATURES                                                                    5
</TABLE>

<PAGE>

PART I - FINANCIAL INFORMATION

CONTROLS AND PROCEDURES

The CEO and Treasurer note that, since December 31, 2004 to March 31, 2005,
there have been no significant changes in our Internal Controls and Procedures.

Our CEO and Treasurer have concluded that our Internal Controls and Procedures
are effective to ensure that material information relating to CCFNB Bancorp,
Inc. and its consolidated subsidiaries is made known to management, including
the CEO and Treasurer, particularly during the period when our Exchange Act
periodic reports are being prepared, and that our Internal Controls and
Procedures are effective to provide reasonable assurance that our financial
statements are fairly presented in conformity with generally accepted accounting
principles as of March 31, 2005.

                                       4

<PAGE>

                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this amendment to the report on Form 10-Q for the
period ended March 31, 2005, to be signed on its behalf by the undersigned
thereunto duly authorized.

                                        CCFNB BANCORP, INC.
                                               (Registrant)

                                        By /s/ Lance O. Diehl
                                           ------------------------------------
                                           Lance O. Diehl
                                           President and CEO

                                        Date: August 8, 2005

                                        By /s/ Virginia D. Kocher
                                           ------------------------------------
                                           Virginia D. Kocher
                                            Treasurer

                                        Date: August 8, 2005

                                       5