EX-99.906CERT

Section 906 Certifications


                CERTIFICATION PURSUANT TO 18 U.S.C SECTION 1350,

                             AS ADOPTED PURSUANT TO

                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2003



         JOHN V. MURPHY, Chief Executive Officer, and BRIAN W. WIXTED Chief
Financial Officer of Oppenheimer MidCap Fund (the "Registrant"), each certify to
the best of his or her knowledge that:

         1.
                  The Registrant's periodic report on Form N-CSR for the period
ended April 30, 2003 (the "Form N-CSR") fully complies with the requirements of
Sections 15(d) of the Securities Exchange Act of 1934, as amended; and

         2.
                  The information contained in the Form N-CSR fairly presents,
in all material respects, the financial condition and results of operations of
the Registrant.

Chief Executive Officer                              Chief Financial Officer

Oppenheimer MidCap Fund                              Oppenheimer MidCap Fund

/S/JOHN V. MURPHY                                    /S/BRIAN W. WIXTED
- -----------------                                    ------------------

John V. Murphy                                       Brian W. Wixted

Date: 06/19/03                                       Date: 06/19/03



A signed original of this written statement required by Section 906 of the
Sarbanes-Oxley Act of 2002 has been provided to Oppenheimer MidCap Fund and will
be retained by Oppenheimer MidCap Fund and furnished to the Securities and
Exchange Commission (the "Commission") or its staff upon request.

This certification is being furnished to the Commission solely pursuant to 18
U.S.C. ss. 1350 and is not being filed as part of the Form N-CSR filed with the
Commission.