Directory of Power Plants in Idaho
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Soda | PacifiCorp | Soda Springs, ID | PacifiCorp East (PACE) | 16.3 GWh | Jun 1924 | Dec 2025 | Water |
| Salmon Diesel | Idaho Power Co | Salmon, ID | Idaho Power Company (IPCO) | 56.0 MWh | Nov 1967 | May 2026 | Distillate Fuel Oil |
| Shoshone Falls | Idaho Power Co | Twin Falls, ID | Idaho Power Company (IPCO) | 51.9 GWh | Jul 1907 | Dec 2025 | Water |
| Swan Falls | Idaho Power Co | Kuna, ID | Idaho Power Company (IPCO) | 110.0 GWh | Feb 1994 | Dec 2025 | Water |
| South Forks Hydro | South Forks Joint Venture | Hansen, ID | Idaho Power Company (IPCO) | 26.3 GWh | Nov 1984 | Oct 2025 | Water |
| Simplot Leasing Don Plant | Simplot Leasing Corp | Pocatello, ID | Idaho Power Company (IPCO) | 73.2 GWh | Jan 1986 | May 2026 | Waste Heat |
| S E Hazelton A | North Side Energy Company | Hazelton, ID | Idaho Power Company (IPCO) | 24.9 GWh | May 1990 | Oct 2025 | Water |
| Salmon Falls Wind Park | Idaho Wind Partners 1 LLC | Hagerman, ID | Idaho Power Company (IPCO) | 58.3 GWh | Mar 2011 | Dec 2025 | Wind |
| Sawtooth Wind Project | Idaho Winds LLC | Glenns Ferry, ID | Idaho Power Company (IPCO) | 49.9 GWh | Sep 2011 | Dec 2025 | Wind |
| Simcoe Solar | Simcoe Solar | Mountain Home, ID | Idaho Power Company (IPCO) | 48.0 GWh | Feb 2017 | May 2026 | Solar |
| Smith Falls Hydro Project | Smith Creek Hydro, LLC | Bonners Ferry, ID | Bonneville Power Administration (BPAT) | 87.2 GWh | Nov 1989 | Dec 2025 | Water |
Browse Power Plants By Idaho Counties
Figures are based on May 2026 generation numbers.| County | State Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Lemhi County, ID | # 35 | 1 | 56.0 MWh |
| Butte County, ID | # 34 | 1 | 7.8 GWh |
| Jefferson County, ID | # 33 | 1 | 9.2 GWh |
| Clark County, ID | # 32 | 2 | 10.4 GWh |
| Adams County, ID | # 31 | 1 | 13.7 GWh |
| Lincoln County, ID | # 30 | 3 | 15.3 GWh |
| Blaine County, ID | # 29 | 2 | 16.8 GWh |
| Teton County, ID | # 28 | 2 | 24.2 GWh |
| Madison County, ID | # 27 | 1 | 37.7 GWh |
| Canyon County, ID | # 26 | 4 | 39.5 GWh |
| Valley County, ID | # 25 | 1 | 40.3 GWh |
| Boise County, ID | # 24 | 1 | 46.8 GWh |
| Franklin County, ID | # 23 | 2 | 48.1 GWh |
| Gem County, ID | # 22 | 2 | 62.9 GWh |
| Fremont County, ID | # 21 | 4 | 87.8 GWh |
| Bannock County, ID | # 20 | 4 | 89.2 GWh |
| Minidoka County, ID | # 19 | 2 | 98.8 GWh |
| Caribou County, ID | # 18 | 4 | 102.4 GWh |
| County | State Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Boundary County, ID | # 17 | 2 | 108.6 GWh |
| Jerome County, ID | # 16 | 13 | 168.0 GWh |
| Cassia County, ID | # 15 | 10 | 282.9 GWh |
| Owyhee County, ID | # 14 | 3 | 401.1 GWh |
| Nez Perce County, ID | # 13 | 1 | 473.0 GWh |
| Bingham County, ID | # 12 | 2 | 504.9 GWh |
| Power County, ID | # 11 | 6 | 635.3 GWh |
| Gooding County, ID | # 10 | 14 | 773.4 GWh |
| Bonner County, ID | # 9 | 2 | 1.1 TWh |
| Ada County, ID | # 8 | 14 | 1.2 TWh |
| Twin Falls County, ID | # 7 | 40 | 1.3 TWh |
| Clearwater County, ID | # 6 | 2 | 1.5 TWh |
| Payette County, ID | # 5 | 1 | 1.7 TWh |
| Bonneville County, ID | # 4 | 13 | 1.8 TWh |
| Washington County, ID | # 3 | 2 | 2.3 TWh |
| Kootenai County, ID | # 2 | 4 | 2.6 TWh |
| Elmore County, ID | # 1 | 26 | 2.9 TWh |