Geothermal Power Plants in the US

69 plants · 4.4 GW total capacity · across 7 states

There are 69 geothermal power plants across 7 US states with 4.4 GW total capacity. California leads with 32 plants.

Largest is Geysers Unit 5-20 (1236 MW Geothermal); oldest active is Geysers Unit 5-20 (1971); newest is Raft River Geothermal Power Plant (2025); top state is California (32 plants); top owner is Ormat Technology (18 plants).

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By State

Utah

5 plants · 238 MW

Oregon

2 plants · 37 MW

Hawaii

1 plants · 51 MW

New Mexico

1 plants · 19 MW

Idaho

1 plants · 16 MW

Largest Geothermal Plants (top 200 by capacity)

Geysers Unit 5-20, CA — 1236 MW
Calistoga Power Plant, CA — 176 MW
Cape Generating Station, UT — 159 MW
McGinness Hills 3, NV — 113 MW
Geothermal 1, CA — 110 MW
Geothermal 2, CA — 110 MW
McGinness Hills, NV — 104 MW
Coso Finance Partners, CA — 92 MW
Heber Geothermal, CA — 92 MW
Coso Energy Developers, CA — 90 MW
Coso Power Developers, CA — 90 MW
North Brawley Geothermal Plant, CA — 80 MW
Sonoma California Geothermal, CA — 78 MW
Tungsten Mountain, NV — 75 MW
Second Imperial Geothermal, CA — 75 MW
Dixie Valley, NV — 71 MW
Stillwater Facility, NV — 69 MW
NGP Blue Mountain I LLC, NV — 64 MW
Patua Acquisition Project, LLC, NV — 59 MW
Salton Sea Power LLC - Unit 5, CA — 58 MW
Bottle Rock Power, CA — 55 MW
John L. Featherstone Plant, CA — 55 MW
Salton Sea Power Gen Co - Unit 3, CA — 54 MW
Puna Geothermal Venture I, HI — 51 MW
Salton Sea Power Gen Co - Unit 4, CA — 48 MW
Ormesa III, CA — 46 MW
Elmore Company, CA — 46 MW
CE Leathers, CA — 46 MW
Del Ranch Company, CA — 46 MW
CD4, CA — 44 MW
Vulcan-BN Geothermal Power Company, CA — 40 MW
Blundell, UT — 38 MW
Steamboat Hills LP, NV — 37 MW
North Valley, NV — 37 MW
Beowawe, NV — 35 MW
Neal Hot Springs Geothermal Project, OR — 33 MW
Tuscarora Geothermal Power Plant, NV — 32 MW
Galena 3 Geothermal Power Plant, NV — 32 MW
Brady, NV — 30 MW
Fish Lake Geothermal, NV — 27 MW
Steamboat III, NV — 26 MW
Steamboat II, NV — 26 MW
Desert Peak Power Plant, NV — 26 MW
Richard Burdette Geothermal, NV — 26 MW
Soda Lake 3, NV — 26 MW
Cove Fort, UT — 25 MW
Aidlin Geothermal Power Plant, CA — 25 MW
Ormesa II, CA — 24 MW
Salt Wells, NV — 24 MW
Jersey Valley Geothermal Power Plant, NV — 24 MW
Star Peak Geothermal Plant, NV — 22 MW
Geo East Mesa II, CA — 22 MW
Don A Campbell 1 Geothermal, NV — 20 MW
Don A Campbell 2 Geothermal, NV — 20 MW
Salton Sea Power Gen Co - Unit 2, CA — 20 MW
Lightning Dock Geothermal, NM — 19 MW
Ormesa I, CA — 19 MW
Galena 2 Geothermal Power Plant, NV — 17 MW
Raft River Geothermal Power Plant, ID — 16 MW
Mammoth G3, CA — 15 MW
Mammoth G2, CA — 15 MW
Thermo No 1, UT — 14 MW
San Emidio, NV — 12 MW
CE Turbo LLC, CA — 12 MW
Salton Sea Power Gen Co - Unit 1, CA — 10 MW
Mammoth G1, CA — 10 MW
Whitegrass No. 1, NV — 6 MW
Paisley Geothermal Generating Plant, OR — 4 MW
Rodatherm Milford 1, UT — 2 MW