Oglethorpe Power 10-K 2005 FY Annual report

QuickLinks -- Click here to rapidly navigate through this document

EXHIBIT 32.2

Certification Pursuant to 18 U.S.C. 1350
As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

        In connection with the Annual Report on Form 10-K for the fiscal year ended December 31, 2005 (the "Report") of Oglethorpe Power Corporation (the "Registrant"), as filed with the Securities and Exchange Commission on the date hereof, I, Elizabeth B. Higgins, the Chief Financial Officer of the Registrant certify, to the best of my knowledge, that:

(1)

The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and



(2)

The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

/s/  ELIZABETH B. HIGGINS      Elizabeth B. Higgins
Chief Financial Officer

March 30, 2006Date

QuickLinks

Certification Pursuant to 18 U.S.C. 1350 As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002