Directory of Power Plants in Idaho
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| American Falls Solar | American Falls Solar LLC | American Falls, ID | Idaho Power Company (IPCO) | 44.5 GWh | Feb 2017 | Sep 2025 | Solar |
| American Falls Solar II | American Falls Solar II, LLC | American Falls, ID | Idaho Power Company (IPCO) | 45.7 GWh | Feb 2017 | Sep 2025 | Solar |
| AJMS, LLC | AJMS, LLC | Shoshone, ID | Idaho Power Company (IPCO) | 3.8 GWh | Sep 2015 | Dec 2024 | Water |
| Arrowrock Hydroelectric Project | Boise-Kuna Irrigation District | Boise, ID | Idaho Power Company (IPCO) | 73.0 GWh | Mar 2010 | Dec 2024 | Water |
| American Falls | Idaho Power Co | American Falls, ID | Idaho Power Company (IPCO) | 242.4 GWh | Feb 1978 | Oct 2024 | Water |
| Albeni Falls | USACE Northwestern Division | Oldtown, ID | Bonneville Power Administration (BPAT) | 179.3 GWh | Apr 1955 | Dec 2024 | Water |
| Anderson Ranch | U S Bureau of Reclamation | Mountain Home, ID | Bonneville Power Administration (BPAT) | 130.0 GWh | Nov 1950 | Dec 2024 | Water |
| Amalgamated Sugar Twin Falls | The Amalgamated Sugar Co | Twin Falls, ID | Idaho Power Company (IPCO) | 28.5 GWh | Nov 1948 | Dec 2024 | Natural Gas |
| Amalgamated Sugar LLC Nampa | Amalgamated Sugar Co-Nampa | Nampa, ID | Idaho Power Company (IPCO) | 51.9 GWh | Sep 1948 | Dec 2024 | Natural Gas |
| Ashton | PacifiCorp | Ashton, ID | PacifiCorp East (PACE) | 32.6 GWh | Jun 1917 | Dec 2024 | Water |
Browse Power Plants By Idaho Counties
Figures are based on September 2025 generation numbers.| County | State Rank | Active Plants | Sep 2025 Generation |
|---|---|---|---|
| Lemhi County, ID | # 35 | 1 | 37.0 MWh |
| Jefferson County, ID | # 34 | 1 | 9.2 GWh |
| Butte County, ID | # 33 | 1 | 10.1 GWh |
| Clark County, ID | # 32 | 2 | 12.6 GWh |
| Adams County, ID | # 31 | 1 | 14.2 GWh |
| Lincoln County, ID | # 30 | 3 | 15.7 GWh |
| Blaine County, ID | # 29 | 2 | 24.7 GWh |
| Teton County, ID | # 28 | 2 | 27.8 GWh |
| Valley County, ID | # 27 | 1 | 37.4 GWh |
| Madison County, ID | # 26 | 1 | 39.9 GWh |
| Boise County, ID | # 25 | 1 | 42.0 GWh |
| Canyon County, ID | # 24 | 4 | 52.3 GWh |
| Franklin County, ID | # 23 | 2 | 53.0 GWh |
| Gem County, ID | # 22 | 2 | 58.8 GWh |
| Bannock County, ID | # 21 | 4 | 85.5 GWh |
| Boundary County, ID | # 20 | 2 | 103.9 GWh |
| Fremont County, ID | # 19 | 4 | 106.0 GWh |
| Caribou County, ID | # 18 | 4 | 111.6 GWh |
| County | State Rank | Active Plants | Sep 2025 Generation |
|---|---|---|---|
| Minidoka County, ID | # 17 | 2 | 111.7 GWh |
| Jerome County, ID | # 16 | 13 | 188.4 GWh |
| Cassia County, ID | # 15 | 10 | 367.0 GWh |
| Bingham County, ID | # 14 | 2 | 431.1 GWh |
| Nez Perce County, ID | # 13 | 1 | 451.0 GWh |
| Owyhee County, ID | # 12 | 3 | 457.8 GWh |
| Power County, ID | # 11 | 6 | 698.0 GWh |
| Gooding County, ID | # 10 | 14 | 845.9 GWh |
| Ada County, ID | # 9 | 13 | 968.2 GWh |
| Bonner County, ID | # 8 | 2 | 1.0 TWh |
| Clearwater County, ID | # 7 | 2 | 1.4 TWh |
| Twin Falls County, ID | # 6 | 40 | 1.4 TWh |
| Payette County, ID | # 5 | 1 | 1.8 TWh |
| Bonneville County, ID | # 4 | 13 | 2.0 TWh |
| Washington County, ID | # 3 | 2 | 2.2 TWh |
| Kootenai County, ID | # 2 | 4 | 2.3 TWh |
| Elmore County, ID | # 1 | 26 | 3.2 TWh |