Power Plants in Ohio

Ohio's generating fleet holds 35.9 gigawatts of nameplate capacity across 215 plants in service, ranking 11th among the 50 states and DC by total capacity. The equipment listed here could produce that much running flat out — this is capacity, not generation, and a megawatt of solar and a megawatt of nuclear appear the same here despite generating very different amounts over a year.

Natural gas dominates the fleet at 55.1% of capacity, spread across 52 plants. Coal supplies 19.3%, with seven plants including the largest in the state: Gavin Power, LLC, at 2,600 megawatts and first online in 1974. Solar accounts for 13.6% of capacity from 76 plants, while nuclear, wind, and smaller sources make up the remainder. The five largest plants by capacity are Gavin Power, LLC (coal, 2,600 megawatts), Guernsey Power Station (natural gas, 2,055 megawatts), Cardinal (coal, 1,880 megawatts), Hanging Rock Energy Facility (natural gas, 1,430 megawatts), and Perry (nuclear, 1,312 megawatts).

Ohio's generating equipment spans nearly a century, from Clevelandcliffs Warren, first online in October 1934, to Grover Hill Wind, LLC, which came online in May 2026. The state maintains a mix of aging and newer generation across its coal, natural gas, nuclear, and renewable installations.