Geography-bound · 2025
Geothermal Energy
Electricity reported from geothermal generating units.
- California
- Geographic lead
- 7
- States with output
- 15.7M MWh
- US generation · 2025
- 1.2%
- Median own-mix share (positive states)
Verify with EIA → · Methodology
California holds 69% of U.S. geothermal
According to the U.S. Energy Information Administration (EIA State Electricity Profiles, 2025), Geothermal generated 15.7M MWh of U.S. electricity across 7 states, led by California at 69% of the national total. Geothermal supplies 4.5% of California's own electricity mix.
Operating fleet · May 2026
Largest plants with operating geothermal units
EIA lists 63 plants with 2,570.4 MW of operating summer capacity in the matched geothermal categories. The table shows the 30 largest plants after combining their matched generator units.
Scroll horizontally for state, technology, and capacity.
| Plant | Reported operator | State | Technology | Summer capacity |
|---|---|---|---|---|
| Geysers Unit 5-20 | Geysers Power Co LLC | California | Geothermal | 644 MW |
| Calistoga Power Plant | Geysers Power Co LLC | California | Geothermal | 100 MW |
| Coso Finance Partners | Coso Operating Co LLC | California | Geothermal | 81.2 MW |
| Coso Power Developers | Coso Operating Co LLC | California | Geothermal | 80.3 MW |
| McGinness Hills 3 | Ormat Nevada Inc | Nevada | Geothermal | 74.2 MW |
| McGinness Hills | Ormat Nevada Inc | Nevada | Geothermal | 70.6 MW |
| Coso Energy Developers | Coso Operating Co LLC | California | Geothermal | 67.8 MW |
| Heber Geothermal | ORCAL Geothermal, Inc | California | Geothermal | 63.5 MW |
| Geothermal 1 | Northern California Power Agny | California | Geothermal | 60 MW |
| Dixie Valley | Ormat Nevada Inc | Nevada | Geothermal | 58.5 MW |
| Second Imperial Geothermal | ORCAL Geothermal, Inc | California | Geothermal | 52.1 MW |
| Salton Sea Power Gen Co - Unit 3 | CalEnergy Operating Corporation | California | Geothermal | 50 MW |
| Sonoma California Geothermal | Geysers Power Co LLC | California | Geothermal | 50 MW |
| John L. Featherstone Plant | Hudson Ranch Power I LLC | California | Geothermal | 49.9 MW |
| Elmore Company | CalEnergy Operating Corporation | California | Geothermal | 49 MW |
| Salton Sea Power LLC - Unit 5 | CalEnergy Operating Corporation | California | Geothermal | 46 MW |
| Salton Sea Power Gen Co - Unit 4 | CalEnergy Operating Corporation | California | Geothermal | 44 MW |
| CE Leathers | CalEnergy Operating Corporation | California | Geothermal | 42 MW |
| Del Ranch Company | CalEnergy Operating Corporation | California | Geothermal | 42 MW |
| Tungsten Mountain | Tungsten Mountain | Nevada | Geothermal | 41.4 MW |
| Stillwater Facility | Ormat Stillwater LLC | Nevada | Geothermal | 40.4 MW |
| Geothermal 2 | Northern California Power Agny | California | Geothermal | 40 MW |
| Puna Geothermal Venture I | Puna Geothermal Venture | Hawaii | Geothermal | 39.9 MW |
| Vulcan-BN Geothermal Power Company | CalEnergy Operating Corporation | California | Geothermal | 38 MW |
| Blundell | PacifiCorp | Utah | Geothermal | 31.7 MW |
| NGP Blue Mountain I LLC | NGP Blue Mountain I LLC | Nevada | Geothermal | 30 MW |
| Patua Acquisition Project, LLC | Patua Acquisition Company, LLC | Nevada | Geothermal | 30 MW |
| CD4 | CD4 | California | Geothermal | 29.6 MW |
| Cove Fort | Ormat Cove Fort LLC | Utah | Geothermal | 25 MW |
| Salton Sea Power Gen Co - Unit 2 | CalEnergy Operating Corporation | California | Geothermal | 23.1 MW |
Capacity is not generation: it describes the rated operating fleet, while the state table reports electricity actually generated during 2025.
69%
national total in the lead state
7
states with any geothermal output
1.2%
median own-mix share among positive states
California
geographic lead (4.5% of its mix)
Geothermal Generation by State
| Rank | State | Generation (MWh) | Share of State Mix |
|---|---|---|---|
| #1 | California | 10.7M | 4.5% |
| #2 | Nevada | 3.9M | 8.2% |
| #3 | Utah | 468.2K | 1.2% |
| #4 | Hawaii | 257.1K | 2.3% |
| #5 | Oregon | 182.1K | 0.3% |
| #6 | Idaho | 82.1K | 0.4% |
| #7 | New Mexico | 58.1K | 0.1% |
Geothermal generation leaders (2025)
Net generation in terawatt-hours (TWh), from EIA State Electricity Profiles.
- California
California
11 TWh
- Nevada 4
Nevada
4 TWh
- Utah 1
Utah
1 TWh
- Hawaii 0
Hawaii
0 TWh
- Oregon 0
Oregon
0 TWh
- Idaho 0
Idaho
0 TWh
- New Mexico 0
New Mexico
0 TWh
Frequently Asked Questions
How geographically concentrated is geothermal generation? ▼
What does geothermal operating capacity mean here? ▼
Where does RateWatt's geothermal data come from? ▼
Reading the geothermal numbers
Geothermal is geography-bound, a handful of states dominate national totals while many report none.
- California reports geothermal at 4.5% of its own mix. California profile
- See every fuel on one hub to place geothermal in the national mix. All energy sources
- LCOE assumptions and cited technology comparisons Read the guide
Generation mix is not the same as the electricity a state consumes; surplus is traded across the grid. See our methodology.
Where these figures come from
Generation and capacity are separate EIA series with separate vintages; neither is a retail-rate or customer-delivery measure.
All federal data sources used on this page
- EIA State Electricity Profiles, net generation by state by energy source. eia.gov/electricity/data/state
- EIA Operating Generator Capacity, operating unit, plant, operator, technology and net summer capacity. eia.gov/opendata
Generation totals on this page come from EIA State Electricity Profiles for 2025; operating-plant capacity comes from the separate EIA operating-generator inventory (May 2026). No figure is typed in by an editor. State shares are generation_mwh for this source ÷ state total generation in the same profile year. Plant rows sum only units whose EIA energy-source/technology labels match this profile's allowlist. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2025.