Exhibit 99.1

FINANCIAL AND STATISTICAL INFORMATION FOR
38 MEMBERS OF OGLETHORPE POWER CORPORATION

        Our members operate their systems on a not-for-profit basis. Accumulated margins derived after payment of operating expenses and provision for depreciation constitute patronage capital of the consumers of our members. Refunds of accumulated patronage capital to the individual consumers may be made from time to time subject to limitations contained in mortgages between our members and the Rural Utilities Service or loan documents with other lenders. The Rural Utilities Service mortgage generally prohibits such distributions unless, after any such distribution, the member's total equity will equal at least 30% of its total assets, except that distributions may be made of up to 25% of the margins and patronage capital received by the member in the preceding year provided that equity is at least 20%.

        We are a membership corporation, and our members are not our subsidiaries. Except with respect to the obligations of our members under each member's wholesale power contract with us and our rights under such contracts to receive payment for power and energy supplied, we have no legal interest in, or obligations in respect of, any of the assets, liabilities, equity, revenues or margins of our members.

        The following selected information on the individual members is intended to show, in the aggregate, the assets, liabilities, equity, revenues and margins of our members. Member assets, liabilities, equity, revenues and margins should not, however, be attributed to us. In addition, the revenues of our members are not pledged to us, but such revenues are received by the respective members and are the source from which moneys are derived by our members to pay for power and energy received from us. Revenues of our members are, however, pledged under their respective Rural Utilities Service mortgages or loan documents with other lenders.

        The information contained in these tables was taken from Rural Utilities Service Financial and Statistical Reports (RUS Form 7) or similar reports prepared for other lenders or provided directly by a member. This information has not been independently verified by the Rural Utilities Service, any lender or us. The "Total" columns were not supplied or compiled by the Rural Utilities Service, any lender or our members. The "Total" column in each table is for informational purposes only, inasmuch as each member operates independently and is not responsible for the obligations of other members, except as provided in the wholesale power contracts (see "BUSINESS—OGLETHORPE POWER CORPORATION—Wholesale Power Contracts" in our Annual Report on Form 10-K for the fiscal year ended December 31, 2014). In addition, the Times Interest Earned, Equity to Assets and Equity to Total Capitalization ratios were calculated by us from information obtained from each member's RUS Form 7 or other financial information provided to us, but the calculations were not independently verified by our members. No adjustments were made by us in calculating these ratios for items such as debt refinancings that are not reflected separately on the financial information provided to us.

        For the calendar years 2012, 2013 and 2014, the information on the individual members is presented in the succeeding tables as follows:

Table 1—Selected Statistics,
Table 2—Average Number of Consumers Served,
Table 3—Annual Megawatt-hour Sales by Consumer Class,
Table 4—Annual Revenues by Consumer Class,
Table 5—Summary of Operating Results, and
Table 6—Condensed Balance Sheet Information.

FINANCIAL AND STATISTICAL INFORMATION FOR THE
38 MEMBERS OF OGLETHORPE POWER CORPORATION

Table 1
SELECTED STATISTICS OF EACH MEMBER
(as of December 31)

Table 1 (continued)

FINANCIAL AND STATISTICAL INFORMATION FOR THE
38 MEMBERS OF OGLETHORPE POWER CORPORATION

Table 2
AVERAGE NUMBER OF CONSUMERS SERVED BY EACH MEMBER