Directory of Power Plants in the United States
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Osage (IA) | City of Osage - (IA) | Osage, IA | Midcontinent Independent System Operator, Inc. (MISO) | 3.8 GWh | Aug 1963 | Dec 2023 | Wind : 73.8% Solar : 26.2% |
| Oso Grande Wind Farm | Tucson Electric Power Co | Maljamar, NM | Tucson Electric Power (TEPC) | 674.2 GWh | Apr 2021 | Feb 2025 | Wind |
| Odin Wind Farm LLC | NRG Energy Gas & Wind Holdings Inc | Mountainlake, MN | Midcontinent Independent System Operator, Inc. (MISO) | 34.2 GWh | Apr 2008 | Dec 2023 | Wind |
| Odell Wind Farm | Algonquin Power Co | Mountain Lake, MN | Midcontinent Independent System Operator, Inc. (MISO) | 739.0 GWh | Jun 2016 | Dec 2023 | Wind |
| Ocotillo Windpower | Duke Energy Renewables Services | Forsan, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 18.4 GWh | Aug 2008 | Dec 2023 | Wind |
| Ocotillo Express LLC | Pattern Operators LP | Ocotillo, CA | California Independent System Operator (CISO) | 520.0 GWh | Nov 2012 | Feb 2025 | Wind |
| Osage Wind, LLC | Enel Green Power NA, Inc. | Burbank, OK | Associated Electric Cooperative, Inc. (AECI) | 511.9 GWh | May 2015 | Dec 2023 | Wind |
| Osborn Wind Energy | Osborn Wind Energy LLC | Stewartsville, MO | Southwest Power Pool (SWPP) | 722.5 GWh | Nov 2016 | Feb 2025 | Wind |
| Osceola Windpower II | Osceola Windpower II | Harris, IA | Midcontinent Independent System Operator, Inc. (MISO) | 211.3 GWh | Aug 2008 | Feb 2025 | Wind |
| Osceola Windpower LLC | Osceola Windpower LLC | Harris, IA | Southwest Power Pool (SWPP) | 416.8 GWh | Jun 2008 | Feb 2025 | Wind |
| Oliver Wind IV | Oliver Wind IV, LLC | Hannover, ND | Southwest Power Pool (SWPP) | 190.4 GWh | - | Feb 2025 | Wind |
| Oasis Wind | Terra-Gen Operating Co-Wind | Mojave, CA | California Independent System Operator (CISO) | 205.4 GWh | Nov 2004 | Dec 2023 | Wind |
| Oasis Alta | Terra-Gen Operating Co-Wind | Mojave, CA | California Independent System Operator (CISO) | 45.4 GWh | Mar 2021 | Dec 2023 | Wind |
| Oakfield Wind Project | Onward Energy | City of Oakfield, ME | ISO New England (ISNE) | 352.4 GWh | Sep 2015 | Feb 2025 | Wind |
| Otter Creek Wind Farm LLC | Avangrid Renewables LLC | Ransom, IL | PJM Interconnection, LLC (PJM) | 474.1 GWh | Feb 2020 | Feb 2025 | Wind |
| Oak Tree Energy | Consolidated Edison Development Inc. | Clark, SD | Southwest Power Pool (SWPP) | 66.7 GWh | Nov 2014 | Dec 2023 | Wind |
| OU Spirit Wind Farm | Oklahoma Gas & Electric Co | Woodward, OK | Southwest Power Pool (SWPP) | 141.4 GWh | Nov 2009 | Dec 2023 | Wind |
| Oak Glen Wind Farm | Minnesota Municipal Power Agny | Blooming Prairie, MN | Midcontinent Independent System Operator, Inc. (MISO) | 95.7 GWh | Oct 2011 | Dec 2023 | Wind |
| Oak Creek Energy Systems I | Terra-Gen Operating Co-Wind | Mojave, CA | California Independent System Operator (CISO) | 37.8 GWh | May 1982 | Dec 2023 | Wind |
| O'Brien Wind | MidAmerican Energy Co | Primghar, IA | Midcontinent Independent System Operator, Inc. (MISO) | 834.6 GWh | Aug 2016 | Dec 2023 | Wind |
| Orient Wind Farm | MidAmerican Energy Co | Orient, IA | Midcontinent Independent System Operator, Inc. (MISO) | 1.9 TWh | Nov 2018 | Feb 2025 | Wind |
| Oliver Wind III, LLC | Oliver Wind III, LLC | Mandan, ND | Midcontinent Independent System Operator, Inc. (MISO) | 436.3 GWh | Dec 2016 | Feb 2025 | Wind |
| Optimum Wind 3 LLC | Optimum Wind 3 LLC | Nevada, IA | Midcontinent Independent System Operator, Inc. (MISO) | 7.1 GWh | Feb 2017 | Dec 2023 | Wind |
| Origin Wind | Enel Green Power NA, Inc. | Hennepin, OK | Southwest Power Pool (SWPP) | 519.8 GWh | Oct 2014 | Dec 2023 | Wind |
| Optimum Wind 4 LLC | Optimum Wind 4 LLC | Nevada, IA | Midcontinent Independent System Operator, Inc. (MISO) | 8.3 GWh | Feb 2017 | Dec 2023 | Wind |
| Optimum Wind 5 LLC | Optimum Wind 5 LLC | Nevada, IA | Midcontinent Independent System Operator, Inc. (MISO) | 8.2 GWh | Feb 2017 | Dec 2023 | Wind |
| Old Trail Wind Farm | Old Trail Wind Farm LLC | Ellsworth, IL | PJM Interconnection, LLC (PJM) | 577.1 GWh | Nov 2007 | Feb 2025 | Wind |
| Old Settler Wind | Old Settler Wind, LLC | Floydada, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 532.6 GWh | Mar 2017 | Feb 2025 | Wind |
| Optimum Wind 6 LLC | Optimum Wind 6 LLC | Nevada, IA | Midcontinent Independent System Operator, Inc. (MISO) | 9.2 GWh | Feb 2017 | Dec 2023 | Wind |
| Optimum Wind 7 LLC | Optimum Wind 7 LLC | Nevada, IA | Midcontinent Independent System Operator, Inc. (MISO) | 10.1 GWh | Feb 2017 | Dec 2023 | Wind |
| Old Gold Energy Center, LLC | Old Gold Energy Center, LLC | Joice, IA | Midcontinent Independent System Operator, Inc. (MISO) | 106.8 GWh | Sep 2001 | Dec 2023 | Wind |
| Oklahoma Wind Energy Center | FPL Energy Oklahoma Wind LLC | Woodward, OK | Southwest Power Pool (SWPP) | 153.0 GWh | Sep 2003 | Dec 2023 | Wind |
| Orchard Windfarm 1, LLC | Orchard Windfarm, LLC | Lexington, OR | PacifiCorp West (PACW) | 25.5 GWh | Nov 2020 | Dec 2023 | Wind |
| Orchard Windfarm 2, LLC | Orchard Windfarm, LLC | Lexington, OR | Bonneville Power Administration (BPAT) | 25.6 GWh | Nov 2020 | Dec 2023 | Wind |
| Orchard Windfarm 3, LLC | Orchard Windfarm, LLC | Lexington, OR | Bonneville Power Administration (BPAT) | 25.4 GWh | Nov 2020 | Dec 2023 | Wind |
| Orchard Windfarm 4, LLC | Orchard Windfarm, LLC | Lexington, OR | PacifiCorp West (PACW) | 25.6 GWh | Nov 2020 | Dec 2023 | Wind |
| Oregon Trail Wind Park | Idaho Wind Partners 1 LLC | Hagerman, ID | Idaho Power Company (IPCO) | 34.6 GWh | Dec 2010 | Dec 2023 | Wind |
| Oregon Trail Windfarm LLC | Echo 1 | Echo, OR | PacifiCorp West (PACW) | 21.2 GWh | May 2009 | Dec 2023 | Wind |
| Ocoee 1 | Tennessee Valley Authority | Benton, TN | Tennessee Valley Authority (TVA) | 69.8 GWh | Dec 1911 | Dec 2023 | Water |
| Osage Dam | Union Electric Co - (MO) | Eldon, MO | Midcontinent Independent System Operator, Inc. (MISO) | 176.1 GWh | Sep 1931 | Dec 2023 | Water |
| Oxbow (CA) | Placer County Water Agency | Foresthill, CA | California Independent System Operator (CISO) | 13.8 GWh | Sep 1966 | Dec 2023 | Water |
| Owyhee Dam Power Project | Owyhee Irrigation District | Nyssa, OR | Idaho Power Company (IPCO) | 15.2 GWh | Jul 1985 | Oct 2023 | Water |
| Oliver Dam | Georgia Power Co | Columbus, GA | Southern Company Services, Inc. - Trans (SOCO) | 134.4 GWh | Jun 1959 | Dec 2023 | Water |
| Ottauquechee Hydro | Green Mountain Power Corp | N. Hartland, VT | ISO New England (ISNE) | 3.5 GWh | Mar 1983 | Dec 2023 | Water |
| Ocoee 2 | Tennessee Valley Authority | Benton, TN | Tennessee Valley Authority (TVA) | 80.7 GWh | Sep 1913 | Dec 2023 | Water |
| Ottumwa City of | Ottumwa City of | Ottumwa, IA | Midcontinent Independent System Operator, Inc. (MISO) | 5.3 GWh | Jul 1931 | Dec 2023 | Water |
| Oakdale | Northern Indiana Pub Serv Co | Monticello, IN | Midcontinent Independent System Operator, Inc. (MISO) | 20.0 GWh | Oct 1925 | Dec 2023 | Water |
| Oakdale Power Station | Massachusetts Water Res Auth | West Boylston, MA | ISO New England (ISNE) | 12.0 GWh | Apr 1951 | Dec 2023 | Water |
| Oneida | PacifiCorp | Riverdale, ID | PacifiCorp East (PACE) | 42.4 GWh | Jun 1915 | Dec 2023 | Water |
| Otis Hydro | Eagle Creek Renewable Energy, LLC | Livermore Falls, ME | ISO New England (ISNE) | 31.4 GWh | Dec 1984 | Feb 2025 | Water |
| Oswego Falls West | Erie Boulevard Hydropower LP | Fulton, NY | New York Independent System Operator (NYIS) | 8.4 GWh | Dec 1913 | Dec 2023 | Water |
| Oswego Falls East | Erie Boulevard Hydropower LP | Fulton, NY | New York Independent System Operator (NYIS) | 24.2 GWh | Dec 1913 | Dec 2023 | Water |
| Oswegatchie | Erie Boulevard Hydropower LP | Edwards, NY | New York Independent System Operator (NYIS) | 8.8 GWh | Jul 2002 | Dec 2023 | Water |
| Olsen | Olsen Power Partners | Whitmore, CA | California Independent System Operator (CISO) | 18.4 GWh | Dec 1989 | Dec 2023 | Water |
| Orono Hydro Station | Brookfield Black Bear Hydro, LLC | Orono, ME | ISO New England (ISNE) | 11.6 GWh | Dec 2008 | Dec 2023 | Water |
| Oconto Falls Lower | Eagle Creek Renewable Energy, LLC | Oconto Falls, WI | Midcontinent Independent System Operator, Inc. (MISO) | 4.4 GWh | Dec 1970 | Dec 2023 | Water |
| Orchard Avenue 1 | Yakima-Tieton Irrigation Dist | Yakima, WA | PacifiCorp West (PACW) | 2.6 GWh | Feb 1987 | Oct 2023 | Water |
| Ocoee 3 | Tennessee Valley Authority | Benton, TN | Tennessee Valley Authority (TVA) | 141.4 GWh | Mar 1943 | Dec 2023 | Water |
| Oak Grove | Portland General Electric Co | Estacada, OR | Portland General Electric Company (PGE) | 152.1 GWh | Jul 1924 | Dec 2023 | Water |
| Ohio Falls | Louisville Gas & Electric Co | Shippingport Island, KY | Louisville Gas and Electric Company and Kentucky Utilities Company (LGEE) | 272.0 GWh | Dec 1927 | Dec 2023 | Water |
| Ogdensburg | Ampersand Ogdensburg Hydro, LLC | Ogdensburg, NY | New York Independent System Operator (NYIS) | 4.0 GWh | Nov 1987 | Dec 2023 | Water |
| Old Hickory | USCE-Nashville District | Hendersonville, TN | Tennessee Valley Authority (TVA) | 368.7 GWh | Mar 1957 | Dec 2023 | Water |
| Oxford Dam | Duke Energy Carolinas, LLC | Conover, NC | Duke Energy Carolinas (DUK) | 87.3 GWh | Mar 1928 | Dec 2023 | Water |
| Ozark | USCE-Little Rock District | Ozark, AR | Southwestern Power Administration (SPA) | 253.1 GWh | Oct 1972 | Dec 2023 | Water |
| Ozark Beach | Empire District Electric Co | Forsyth, MO | Southwest Power Pool (SWPP) | 55.7 GWh | May 1931 | Dec 2023 | Water |
| Oxbow (OR) | Idaho Power Co | Oxbow, OR | Idaho Power Company (IPCO) | 900.1 GWh | Jun 1961 | Dec 2023 | Water |
| Opal Springs Hydro | Deschutes Valley Water District | Culver, OR | PacifiCorp West (PACW) | 24.2 GWh | Dec 1984 | Dec 2023 | Water |
| Orono B | Brookfield Black Bear Hydro, LLC | Orono, ME | ISO New England (ISNE) | 25.5 GWh | Oct 2013 | Dec 2023 | Water |
| Oahe | USACE-Omaha | Pierre, SD | Southwest Power Pool (SWPP) | 2.1 TWh | Mar 1962 | Dec 2023 | Water |
| Oconto Falls Upper | Eagle Creek Renewable Energy, LLC | Oconto Falls, WI | Midcontinent Independent System Operator, Inc. (MISO) | 3.2 GWh | Dec 1917 | Dec 2023 | Water |
| OREG 2 Inc | Ormat Nevada Inc | Culbertson, MT | Southwest Power Pool (SWPP) | 110.3 GWh | Nov 2008 | Feb 2025 | Waste Heat |
| OREG 1 Inc | Ormat Nevada Inc | Culbertson, MT | Southwest Power Pool (SWPP) | 146.0 GWh | Jun 2006 | Feb 2025 | Waste Heat |
| OREG 3 Inc | Ormat Nevada Inc | Trimont, MN | Midcontinent Independent System Operator, Inc. (MISO) | 36.2 GWh | Jul 2010 | Feb 2025 | Waste Heat |
| OREG 4 Peetz | Ormat Nevada Inc | Peetz, CO | Western Area Power Administration - Rocky Mountain Region (WACM) | 3.2 GWh | Feb 2009 | May 2024 | Waste Heat |
| Ottumwa | Interstate Power and Light Co | Ottumwa, IA | Midcontinent Independent System Operator, Inc. (MISO) | 2.0 TWh | Apr 1981 | Feb 2025 | Subbituminous Coal : 99.7% |
| Orange Coast College PH2 Solar Project | Solar Star Coastal Pirate, LLC | Costa Mesa, CA | California Independent System Operator (CISO) | 4.6 GWh | Apr 2022 | Dec 2023 | Solar : 88.9% Electricity used for energy storage : 11.1% |
| Oneida - West | Oneida DG Solar, LLC | Whitestown, NY | New York Independent System Operator (NYIS) | 2.3 GWh | Nov 2015 | Dec 2023 | Solar |
| Ontario Sun | Azimuth 180 Solar Electric, LLC | Sandy Creek, NY | New York Independent System Operator (NYIS) | 2.1 GWh | Jan 2023 | Dec 2023 | Solar |
| Onondaga County - Metro Water Board | Tesla Inc. | Clay, NY | New York Independent System Operator (NYIS) | 1.0 GWh | Jan 2016 | Dec 2023 | Solar |
| OR Solar 5, LLC | Heelstone Energy Holdings, LLC | Merrill, OR | PacifiCorp West (PACW) | 18.0 GWh | Dec 2017 | Dec 2023 | Solar |
| Ontario Solar Center | Adapture Renewables, Inc. | Ontario, OR | Idaho Power Company (IPCO) | 5.7 GWh | Apr 2020 | Dec 2023 | Solar |
| Onset West Community Solar Facility | Kearsarge Onset LLC | Wareham, MA | ISO New England (ISNE) | 1.9 GWh | Mar 2016 | Dec 2022 | Solar |
| Onset East Community Solar Facility | Kearsarge Onset LLC | Wareham, MA | ISO New England (ISNE) | 1.8 GWh | Mar 2016 | Dec 2022 | Solar |
| Onyx - Brockton Thatcher Landfill Solar CSG | Onyx Asset Services Group | Brockton, MA | ISO New England (ISNE) | 4.3 GWh | Oct 2017 | Dec 2023 | Solar |
| Onondaga County - Oak Orchard WWTP | Tesla Inc. | Clay, NY | New York Independent System Operator (NYIS) | 2.2 GWh | Oct 2017 | Dec 2023 | Solar |
| Open Range Solar Center, LLC | Cypress Creek Renewables | Nyssa, OR | Idaho Power Company (IPCO) | 21.5 GWh | Aug 2016 | Feb 2025 | Solar |
| O'Brien Solar Fields | Madison Gas & Electric Co | Fitchburg, WI | Midcontinent Independent System Operator, Inc. (MISO) | 37.4 GWh | Apr 2021 | Dec 2023 | Solar |
| Open View Solar Farm | Cross Pollination Inc | New Haven, VT | ISO New England (ISNE) | 2.5 GWh | Aug 2013 | Dec 2023 | Solar |
| Ozarks Natural Energy Community Solar | Ozarks Electric Coop Corp - (AR) | Springdale, AR | Southwest Power Pool (SWPP) | 1.3 GWh | Mar 2016 | Dec 2023 | Solar |
| Onyx - Saratoga Springs Landfill Solar CSG | Onyx Asset Services Group | Saratoga Springs, NY | New York Independent System Operator (NYIS) | 2.7 GWh | Oct 2017 | Dec 2023 | Solar |
| OR Solar 6, LLC | Heelstone Energy Holdings, LLC | Lakeview, OR | PacifiCorp West (PACW) | 23.3 GWh | Nov 2017 | Dec 2023 | Solar |
| OR Solar 8, LLC | Heelstone Energy Holdings, LLC | Dairy, OR | PacifiCorp West (PACW) | 23.7 GWh | Feb 2018 | Dec 2023 | Solar |
| Onion River | Wisconsin Power & Light Co | Sheboygan Cedar Grove, WI | Midcontinent Independent System Operator, Inc. (MISO) | 204.3 GWh | Nov 2023 | Feb 2025 | Solar |
| Ouchchy PV1 | Ecoplexus, Inc | Mebane, NC | Duke Energy Carolinas (DUK) | 5.0 GWh | Nov 2015 | Dec 2023 | Solar |
| Orange Blossom Solar Center | Florida Power & Light Co | Vero Beach, FL | Florida Power & Light Co. (FPL) | 146.9 GWh | Apr 2021 | Feb 2025 | Solar |
| Orange County Solar Farm (NY) | Tesla Inc. | Goshen, NY | ISO New England (ISNE) | 2.3 GWh | Apr 2017 | Dec 2023 | Solar |
| Orange PV | Terraform Arcadia | Orange, MA | ISO New England (ISNE) | 2.3 GWh | Jun 2013 | Dec 2023 | Solar |
| Orchard | Florida Power & Light Co | Ft. Pierce, FL | Florida Power & Light Co. (FPL) | 177.2 GWh | - | Feb 2025 | Solar |
| Onyx - Pembroke Landfill Solar | Onyx Asset Services Group | Pembroke, MA | ISO New England (ISNE) | 3.7 GWh | Nov 2017 | Dec 2023 | Solar |
| OR Solar 2, LLC | OR Solar 2, LLC | Eagle Point, OR | PacifiCorp West (PACW) | 21.3 GWh | Sep 2020 | Dec 2023 | Solar |
Summary of Power Plants By State
Figures are based on February 2025 generation numbers.| State | Rank | Active Plants | Feb 2025 Generation |
|---|---|---|---|
| Alabama | # 7 | 75 | 10,454.23 GWh |
| Alaska | # 48 | 136 | 486.57 GWh |
| Arizona | # 15 | 165 | 7,949.76 GWh |
| Arkansas | # 28 | 80 | 4,750.62 GWh |
| California | # 5 | 1,593 | 15,002.38 GWh |
| Colorado | # 30 | 265 | 4,484.87 GWh |
| Connecticut | # 34 | 152 | 3,568.74 GWh |
| Delaware | # 49 | 31 | 376.39 GWh |
| District of Columbia | # 51 | 12 | 16.79 GWh |
| Florida | # 3 | 304 | 17,498.62 GWh |
| Georgia | # 8 | 241 | 10,439.72 GWh |
| Hawaii | # 46 | 66 | 666.80 GWh |
| Idaho | # 44 | 143 | 1,423.14 GWh |
| Illinois | # 4 | 338 | 15,696.94 GWh |
| Indiana | # 12 | 203 | 9,055.86 GWh |
| Iowa | # 20 | 281 | 6,506.74 GWh |
| Kansas | # 24 | 157 | 5,156.03 GWh |
| Kentucky | # 21 | 56 | 6,138.53 GWh |
| Louisiana | # 17 | 80 | 7,192.83 GWh |
| Maine | # 45 | 159 | 1,123.08 GWh |
| Maryland | # 39 | 181 | 2,579.41 GWh |
| Massachusetts | # 42 | 599 | 1,604.74 GWh |
| Michigan | # 10 | 267 | 10,280.63 GWh |
| Minnesota | # 27 | 740 | 5,066.98 GWh |
| Mississippi | # 22 | 55 | 5,414.37 GWh |
| Missouri | # 19 | 118 | 6,559.07 GWh |
| State | Rank | Active Plants | Feb 2025 Generation |
|---|---|---|---|
| Montana | # 40 | 69 | 2,324.85 GWh |
| Nebraska | # 36 | 119 | 3,333.41 GWh |
| Nevada | # 37 | 109 | 3,002.03 GWh |
| New Hampshire | # 43 | 56 | 1,435.29 GWh |
| New Jersey | # 31 | 375 | 4,428.89 GWh |
| New Mexico | # 38 | 140 | 2,585.31 GWh |
| New York | # 11 | 830 | 10,266.35 GWh |
| North Carolina | # 9 | 880 | 10,422.85 GWh |
| North Dakota | # 33 | 57 | 3,825.72 GWh |
| Ohio | # 6 | 190 | 12,150.65 GWh |
| Oklahoma | # 18 | 131 | 6,818.46 GWh |
| Oregon | # 25 | 259 | 5,152.36 GWh |
| Pennsylvania | # 2 | 240 | 21,039.59 GWh |
| Rhode Island | # 47 | 95 | 598.64 GWh |
| South Carolina | # 14 | 198 | 8,120.13 GWh |
| South Dakota | # 41 | 52 | 1,740.50 GWh |
| Tennessee | # 26 | 84 | 5,101.16 GWh |
| Texas | # 1 | 813 | 43,152.96 GWh |
| Utah | # 35 | 119 | 3,334.96 GWh |
| Vermont | # 50 | 112 | 195.02 GWh |
| Virginia | # 13 | 215 | 8,814.15 GWh |
| Washington | # 16 | 137 | 7,908.11 GWh |
| West Virginia | # 29 | 36 | 4,645.25 GWh |
| Wisconsin | # 23 | 221 | 5,315.49 GWh |
| Wyoming | # 32 | 73 | 3,941.95 GWh |