Power Plants in Oklahoma

Oklahoma's power sector in numbers

Bywatts maps 73 operating power plants with 25.0 GW of nameplate capacity in Oklahoma. Natural Gas leads with 56% of that capacity across 23 plants, followed by Coal (27%) and Wind (12%). The inventory also includes 12 plants (215 MW) that EIA-860 lists as retired and 1 never built; the largest retired plant is KODE NOVUS I (80 MW, retired 2022).

The largest operating plants are NORTHEASTERN (1,951 MW, Coal, PUBLIC SERVICE CO OF OKLAHOMA), SEMINOLE (1,724 MW, Natural Gas, OKLAHOMA GAS & ELECTRIC CO) and MUSKOGEE (1,716 MW, Coal, OKLAHOMA GAS & ELECTRIC CO).

Of the 72 operating plants with a recorded commissioning year, 36 came online in 2000 or later and 16 in 2010 or later; the busiest decade for new capacity was the 2000s (8.1 GW).

The largest operators by operating capacity are OKLAHOMA GAS & ELECTRIC CO (10 plants, 8.5 GW), PUBLIC SERVICE CO OF OKLAHOMA (6 plants, 4.5 GW) and GRAND RIVER DAM AUTHORITY (4 plants, 1.7 GW).

Retail electricity sales in Oklahoma reached 75.1 TWh in 2025, up 22.5% over ten years and up 4.2% year on year; residential customers took 32.6% of it. The average retail price across all sectors was 9.50 cents per kWh, up 20.2% since 2015.

The database also maps 546 named substations (17 of the 44 with a recorded voltage are rated 345 kV or above), 2 data centers (operators include OCOSA and TierPoint), 64 solar installers and 18 solar companies in Oklahoma.

Operating capacity by fuel

Retail electricity sales

Sources: HIFLD power-plant inventory (capacity, fuel, operator), EIA-860 (commissioning year, retirements, operable capacity), EIA retail sales and revenue series through January 2026. Counts are of plants Bywatts lists, not every generator in the state.