Power Plants in Indiana

Indiana's power sector in numbers

Bywatts maps 77 operating power plants with 25.7 GW of nameplate capacity in Indiana. Coal leads with 68% of that capacity across 19 plants, followed by Natural Gas (23%) and Wind (6%). The inventory also includes 22 plants (3.6 GW) that EIA-860 lists as retired, 3 partly retired with no operable units of their recorded fuel and 2 never built; the largest retired plant is TANNERS CREEK (1,100 MW, retired 2015).

The largest operating plants are GIBSON (3,340 MW, Coal, DUKE ENERGY INDIANA INC), ROCKPORT (2,600 MW, Coal, INDIANA MICHIGAN POWER CO) and R M SCHAHFER (2,201 MW, Coal, NORTHERN INDIANA PUB SERV CO).

Of the 73 operating plants with a recorded commissioning year, 32 came online in 2000 or later and 15 in 2010 or later; the busiest decade for new capacity was the 1970s (7.3 GW).

The largest operators by operating capacity are DUKE ENERGY INDIANA INC (7 plants, 5.6 GW), INDIANAPOLIS POWER & LIGHT CO (4 plants, 4.1 GW) and NORTHERN INDIANA PUB SERV CO (5 plants, 3.3 GW).

Retail electricity sales in Indiana reached 103.5 TWh in 2025, down 1.0% over ten years and up 4.3% year on year; residential customers took 33.3% of it. The average retail price across all sectors was 12.57 cents per kWh, up 39.8% since 2015.

The database also maps 300 named substations (6 of the 13 with a recorded voltage are rated 345 kV or above), 6 data centers (operators include Citynet, Global Access Point and Indiana University), 89 solar installers and 36 solar companies in Indiana.

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.