Directory of Power Plants in the United States
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| OE_AZ1 | Onward Energy | Salome, AZ | Western Area Power Administration - Desert Southwest Region (WALC) | 76.8 GWh | Nov 2019 | Aug 2026 | Solar |
| Oso Grande Wind Farm | Tucson Electric Power Co | Maljamar, NM | Tucson Electric Power (TEPC) | 592.7 GWh | Apr 2021 | Aug 2026 | Wind |
| Ocoee 3 | Tennessee Valley Authority | Benton, TN | Tennessee Valley Authority (TVA) | 141.3 GWh | Mar 1943 | Dec 2025 | Water |
| Ocoee 2 | Tennessee Valley Authority | Benton, TN | Tennessee Valley Authority (TVA) | 98.1 GWh | Sep 1913 | Dec 2025 | Water |
| Ocoee 1 | Tennessee Valley Authority | Benton, TN | Tennessee Valley Authority (TVA) | 65.6 GWh | Dec 1911 | Dec 2025 | Water |
| OETN1 | OE_TN1 | Obion, TN | Tennessee Valley Authority (TVA) | 189.5 GWh | Feb 2023 | Aug 2026 | Solar |
| Old Hickory | USCE-Nashville District | Hendersonville, TN | Tennessee Valley Authority (TVA) | 324.7 GWh | Mar 1957 | Dec 2025 | Water |
| Optimist | Origis Energy USA, Inc | West Point, MS | Tennessee Valley Authority (TVA) | 300.6 GWh | - | Aug 2026 | Solar : 99.8% |
| Opryland USA | Gaylord Entertainment Co | Nashville, TN | Tennessee Valley Authority (TVA) | 31.2 GWh | Jun 1995 | Aug 2026 | Natural Gas |
| Osprey Energy Center Power Plant | Duke Energy Florida, LLC | Auburndale, FL | Tampa Electric Company (TEC) | 3.4 TWh | Apr 2004 | Aug 2026 | Natural Gas |
| Ozark | USCE-Little Rock District | Ozark, AR | Southwestern Power Administration (SPA) | 279.6 GWh | Oct 1972 | Dec 2025 | Water |
| Oberlin (KS) | City of Oberlin - (KS) | Oberlin, KS | Southwest Power Pool (SWPP) | 9.8 MWh | Dec 1953 | Dec 2025 | Distillate Fuel Oil |
| OU Spirit Wind Farm | Oklahoma Gas & Electric Co | Woodward, OK | Southwest Power Pool (SWPP) | 127.1 GWh | Nov 2009 | Dec 2025 | Wind |
| Oak Tree Energy | RWE Clean Energy | Clark, SD | Southwest Power Pool (SWPP) | 65.8 GWh | Nov 2014 | Dec 2025 | Wind |
| Ozarks Natural Energy Community Solar | Ozarks Electric Coop Corp - (AR) | Springdale, AR | Southwest Power Pool (SWPP) | 2.1 GWh | Mar 2016 | Dec 2025 | Solar |
| Ozark Solar Park | Today's Power, Inc. | Lincoln, AR | Southwest Power Pool (SWPP) | 4.1 GWh | Jun 2021 | Dec 2025 | Solar |
| Ozark Beach | Empire District Electric Co | Forsyth, MO | Southwest Power Pool (SWPP) | 40.3 GWh | May 1931 | Dec 2025 | Water |
| Oak Leaf - CSG Portfolio (OL 44) | Distributed Solar Development, LLC | Watkins, CO | Southwest Power Pool (SWPP) | 3.0 GWh | Nov 2020 | Dec 2025 | Solar |
| Oak Leaf Solar XVIII LLC | Altus Power America Management, LLC | Denver, CO | Southwest Power Pool (SWPP) | 17.5 GWh | Nov 2021 | Dec 2025 | Solar |
| Oxford (KS) | City of Oxford - (KS) | Oxford, KS | Southwest Power Pool (SWPP) | 4.0 MWh | Jun 1999 | Dec 2025 | Distillate Fuel Oil |
| Oneta Energy Center | Oneta Power LLC | Broken Arrow, OK | Southwest Power Pool (SWPP) | 4.3 TWh | Jun 2002 | Aug 2026 | Natural Gas |
| Oak Leaf - CSG Portfolio (OL 39) | Distributed Solar Development, LLC | Watkins, CO | Southwest Power Pool (SWPP) | 2.7 GWh | May 2021 | Dec 2025 | Solar |
| Oak Leaf - CSG Portfolio (OL 38) | Distributed Solar Development, LLC | Watkins, CO | Southwest Power Pool (SWPP) | 3.0 GWh | May 2021 | Dec 2025 | Solar |
| Oak Leaf - CSG Portfolio (OL 37) | Distributed Solar Development, LLC | Watkins, CO | Southwest Power Pool (SWPP) | 2.5 GWh | Nov 2020 | Dec 2025 | Solar |
| Oak Leaf - CSG Portfolio (OL 36) | Distributed Solar Development, LLC | Watkins, CO | Southwest Power Pool (SWPP) | 3.2 GWh | May 2021 | Dec 2025 | Solar |
| Oxford (NE) | Village of Oxford - (NE) | Oxford, NE | Southwest Power Pool (SWPP) | 82.0 MWh | Jul 1953 | Dec 2025 | Natural Gas : 67.3% Distillate Fuel Oil : 32.7% |
| Oak Grove Power Producers | Cube District Energy, LLC | Arcadia, KS | Southwest Power Pool (SWPP) | 10.9 GWh | Feb 2010 | Dec 2025 | Landfill Gas |
| Oahe | USACE-Omaha | Pierre, SD | Southwest Power Pool (SWPP) | 2.0 TWh | Mar 1962 | Dec 2025 | Water |
| Origin Wind | Origin Wind Energy LLC | Hennepin, OK | Southwest Power Pool (SWPP) | 295.7 GWh | Oct 2014 | Dec 2025 | Wind |
| Osawatomie Power Plant South Sub | City of Osawatomie - (KS) | Osawatomie, KS | Southwest Power Pool (SWPP) | 3.0 MWh | Feb 2017 | Dec 2025 | Distillate Fuel Oil |
| Osmond 1 | Northeast Power | Osmond, NE | Southwest Power Pool (SWPP) | 2.0 MWh | Nov 2023 | Dec 2025 | Distillate Fuel Oil |
| Osawatomie Solar | Evergy Kansas Central, Inc | Osawatomie, KS | Southwest Power Pool (SWPP) | 10.8 GWh | Nov 2024 | Dec 2025 | Solar |
| Osawatomie Power Plant North Sub | City of Osawatomie - (KS) | Osawatomie, KS | Southwest Power Pool (SWPP) | 3.0 MWh | Apr 2018 | Dec 2025 | Distillate Fuel Oil |
| Osawatomie | Evergy Metro | Miami, KS | Southwest Power Pool (SWPP) | 53.6 GWh | May 2003 | Dec 2025 | Natural Gas |
| Osage City Solar | Evergy Kansas Central, Inc | Osage City, KS | Southwest Power Pool (SWPP) | 3.1 GWh | Nov 2024 | Dec 2025 | Solar |
| OREG 2 Inc | Ormat Nevada Inc | Culbertson, MT | Southwest Power Pool (SWPP) | 115.2 GWh | Nov 2008 | Aug 2026 | Waste Heat |
| OREG 1 Inc | Ormat Nevada Inc | Culbertson, MT | Southwest Power Pool (SWPP) | 127.7 GWh | Jun 2006 | Aug 2026 | Waste Heat |
| Ord | City of Ord - (NE) | Ord, NE | Southwest Power Pool (SWPP) | 119.0 MWh | Dec 1962 | Dec 2025 | Distillate Fuel Oil : 99.4% Natural Gas : 0.6% |
| Oklahoma Wind Energy Center | FPL Energy Oklahoma Wind LLC | Woodward, OK | Southwest Power Pool (SWPP) | 140.6 GWh | Sep 2003 | Dec 2025 | Wind |
| Oliver Wind IV | Oliver Wind IV, LLC | Hannover, ND | Southwest Power Pool (SWPP) | 819.2 GWh | Nov 2024 | Aug 2026 | Wind |
| Osborn Wind Energy | Osborn Wind Energy LLC | Stewartsville, MO | Southwest Power Pool (SWPP) | 694.6 GWh | Nov 2016 | Aug 2026 | Wind |
| Osborne | City of Osborne - (KS) | Osborne, KS | Southwest Power Pool (SWPP) | 30.4 MWh | May 1957 | Dec 2025 | Distillate Fuel Oil : 61.7% Natural Gas : 38.3% |
| Osceola Windpower LLC | Osceola Windpower LLC | Harris, IA | Southwest Power Pool (SWPP) | 386.2 GWh | Jun 2008 | Aug 2026 | Wind |
| Oskaloosa | Today's Power, Inc. | Oskaloosa, KS | Southwest Power Pool (SWPP) | 2.1 GWh | Apr 2021 | Dec 2025 | Solar |
| Old Midville Solar | Citizens Enterprises Corporation | Millen, GA | Southern Company Services, Inc. - Trans (SOCO) | 41.6 GWh | Oct 2016 | Dec 2025 | Solar |
| Oil Dri 2 Solar | Westbound Solar LLC | Ochlocknee, GA | Southern Company Services, Inc. - Trans (SOCO) | 2.6 GWh | Apr 2019 | Dec 2025 | Solar |
| OE_GA3 | Onward Energy | Camilla, GA | Southern Company Services, Inc. - Trans (SOCO) | 121.6 GWh | Nov 2019 | Aug 2026 | Solar |
| Old Hayneville Solar, LLC | Old Hayneville Solar, LLC | Montgomery, AL | Southern Company Services, Inc. - Trans (SOCO) | 7.6 GWh | - | Aug 2026 | Solar |
| Oliver Dam | Georgia Power Co | Columbus, GA | Southern Company Services, Inc. - Trans (SOCO) | 120.3 GWh | Jun 1959 | Dec 2025 | Water |
| Omtanke Solar | DG South Carolina Solar, LLC | Ridgeville, SC | South Carolina Public Service Authority (SC) | 9.8 GWh | Feb 2020 | Dec 2025 | Solar |
| Otero Solar | PNM Resources | La Luz, NM | Public Service Company of New Mexico (PNM) | 17.6 GWh | Nov 2013 | Dec 2025 | Solar |
| Overland | Greenbacker Renewable Energy Corporation | Hudson, CO | Public Service Company of Colorado (PSCO) | 22.1 GWh | Nov 2024 | Dec 2025 | Solar |
| Oak Leaf Solar XXVIII LLC (CSG) | Greenbacker Renewable Energy Corporation | Platteville, CO | Public Service Company of Colorado (PSCO) | 3.3 GWh | May 2019 | Dec 2025 | Solar |
| Oak Leaf Solar XXX LLC (CSG) | Greenbacker Renewable Energy Corporation | Alamosa, CO | Public Service Company of Colorado (PSCO) | 3.9 GWh | Nov 2018 | Dec 2025 | Solar |
| Oak Leaf Solar XXXI LLC (CSG) | Greenbacker Renewable Energy Corporation | Debeque, CO | Public Service Company of Colorado (PSCO) | 3.4 GWh | Nov 2018 | Dec 2025 | Solar |
| Oak Leaf Solar XXXII (CSG) | Greenbacker Renewable Energy Corporation | Rifle, CO | Public Service Company of Colorado (PSCO) | 3.4 GWh | Feb 2019 | Dec 2025 | Solar |
| Oak Leaf Solar XXXIII LLC (Lantz) | Greenbacker Renewable Energy Corporation | Salida, CO | Public Service Company of Colorado (PSCO) | 2.7 GWh | Dec 2019 | Dec 2025 | Solar |
| Oak Leaf Solar XXVII LLC | Greenbacker Renewable Energy Corporation | Greely, CO | Public Service Company of Colorado (PSCO) | 3.0 GWh | Oct 2018 | Dec 2025 | Solar |
| Oak Leaf Solar XXI (CSG) | Greenbacker Renewable Energy Corporation | Watkins, CO | Public Service Company of Colorado (PSCO) | 118.0 MWh | Nov 2018 | Dec 2025 | Solar |
| Oak Leaf Solar XXII LLC (CSG) | Greenbacker Renewable Energy Corporation | Denver, CO | Public Service Company of Colorado (PSCO) | 3.1 GWh | Dec 2018 | Dec 2025 | Solar |
| Oak Leaf Solar XXIII LLC (CSG) | Greenbacker Renewable Energy Corporation | Watkins, CO | Public Service Company of Colorado (PSCO) | 2.7 GWh | Dec 2018 | Dec 2025 | Solar |
| Oak Leaf Solar XXIV LLC (CSG) | Greenbacker Renewable Energy Corporation | Watkins, CO | Public Service Company of Colorado (PSCO) | 1.5 GWh | Dec 2018 | Dec 2025 | Solar |
| Oak Leaf Solar XXVI LLC | Greenbacker Renewable Energy Corporation | Denver, CO | Public Service Company of Colorado (PSCO) | 3.4 GWh | Dec 2018 | Dec 2025 | Solar |
| Oak Leaf Solar XXV LLC (CSG) | Greenbacker Renewable Energy Corporation | Watkins, CO | Public Service Company of Colorado (PSCO) | 3.4 GWh | Nov 2018 | Dec 2025 | Solar |
| OR - Solops - SPI 18 - Clayfield | Clayfield Solar, LLC | Estacada, OR | Portland General Electric Company (PGE) | 3.2 GWh | Sep 2024 | Dec 2025 | Solar |
| OR -Solops - SPI 18 - Cork | Cork Solar, LLC | Molalla, OR | Portland General Electric Company (PGE) | 2.4 GWh | Nov 2024 | Dec 2025 | Solar |
| OR - Solops - SPI 18 - Belvedere | Belvedere Solar, LLC | Mount Angel, OR | Portland General Electric Company (PGE) | 5.2 GWh | Nov 2024 | Dec 2025 | Solar |
| O'Neill Creek Solar | O'Neill Creek Solar LLC | Gaston, OR | Portland General Electric Company (PGE) | 3.4 GWh | Oct 2019 | Dec 2025 | Solar |
| OR - Solops - SPI 18 - Dover | Dover Solar, LLC | Canby, OR | Portland General Electric Company (PGE) | 4.0 GWh | Nov 2024 | Dec 2025 | Solar |
| Oak Grove | Portland General Electric Co | Estacada, OR | Portland General Electric Company (PGE) | 142.1 GWh | Jul 1924 | Dec 2025 | Water |
| OR - Green Key - Marquam | Marquam Creek Solar, LLC | Molalla, OR | Portland General Electric Company (PGE) | 3.3 GWh | Nov 2024 | Oct 2025 | Solar |
| OR - Green Key - Buckner CSG | Buckner Creek Solar, LLC | Oregon, OR | Portland General Electric Company (PGE) | 847.0 MWh | Apr 2025 | Dec 2025 | Solar |
| OR - Green Key - Gun Club | Gun Club Solar, LLC | Dundee, OR | Portland General Electric Company (PGE) | 4.6 GWh | Nov 2024 | Dec 2025 | Solar |
| Owens Corning Headquarters | Luminace Solar Holding, LLC | Toledo, OH | PJM Interconnection, LLC (PJM) | 1.5 GWh | Aug 2015 | Dec 2025 | Solar |
| OER Patuxent CSG | Standard Solar | Lothian, MD | PJM Interconnection, LLC (PJM) | 4.2 GWh | Oct 2022 | Dec 2025 | Solar |
| OER Monarch CSG | Standard Solar | Upper Marlboro, MD | PJM Interconnection, LLC (PJM) | 3.4 GWh | Nov 2021 | Dec 2025 | Solar |
| Oxon Run CREF | Oxon Run Community Renewable Energy Facility | Washington, DC | PJM Interconnection, LLC (PJM) | 1.0 GWh | Nov 2021 | Dec 2025 | Solar |
| Oak Trail Solar, LLC | Leeward Asset Management, LLC | Moyock, NC | PJM Interconnection, LLC (PJM) | 230.0 GWh | Jun 2023 | Aug 2026 | Solar |
| Oaks Landfill CS 2 | Greenbacker Renewable Energy Corporation | Gaithersburg, MD | PJM Interconnection, LLC (PJM) | 3.6 GWh | Mar 2024 | Dec 2025 | Solar |
| Ocean County Landfill | NextEra Renewable Fuels, LLC | Manchester, NJ | PJM Interconnection, LLC (PJM) | 64.3 GWh | Jan 1997 | Dec 2024 | Landfill Gas |
| Otter Creek Wind Farm LLC | Avangrid Power LLC | Ransom, IL | PJM Interconnection, LLC (PJM) | 457.7 GWh | Feb 2020 | Aug 2026 | Wind |
| Overlook Medical Center | Atlantic Health System | Summit, NJ | PJM Interconnection, LLC (PJM) | 11.4 GWh | Dec 2011 | Dec 2025 | Natural Gas |
| Oxbow Creek | Oxbow Creek Energy LLC | Factoryville, PA | PJM Interconnection, LLC (PJM) | 40.6 GWh | Nov 2019 | Dec 2025 | Natural Gas |
| Oregon Clean Energy Center | Oregon Clean Energy Center | Oregon, OH | PJM Interconnection, LLC (PJM) | 5.7 TWh | Jun 2017 | Aug 2026 | Natural Gas |
| Otter Creek Solar | Dominion Energy Inc. | Chase City, VA | PJM Interconnection, LLC (PJM) | 119.2 GWh | Sep 2023 | Aug 2026 | Solar |
| Orefield | Madison Energy Investments LLC | Orefield, PA | PJM Interconnection, LLC (PJM) | 2.4 GWh | Nov 2024 | Dec 2025 | Solar |
| Orchard Park | Borough of Chambersburg - (PA) | Chambersburg, PA | PJM Interconnection, LLC (PJM) | 48.4 GWh | Nov 2003 | Aug 2026 | Natural Gas : 95.8% Distillate Fuel Oil : 4.2% |
| Ohio Northern University Solar Site | Onsite Partners, LLC | Ada, OH | PJM Interconnection, LLC (PJM) | 3.7 GWh | Nov 2016 | Aug 2026 | Solar |
| Orange Street G1 | Town of Bedford - (VA) | Bedford, VA | PJM Interconnection, LLC (PJM) | 269.0 MWh | Jun 2005 | Dec 2025 | Distillate Fuel Oil |
| Old Bridge Global Landfill CSG | NJR Clean Energy Ventures Corporation | Old Bridge, NJ | PJM Interconnection, LLC (PJM) | 3.6 GWh | Sep 2023 | Dec 2025 | Solar |
| Old Bridge Solar Farm | NJR Clean Energy Ventures Corporation | Old Bridge, NJ | PJM Interconnection, LLC (PJM) | 13.4 GWh | Jul 2018 | Dec 2025 | Solar |
| Old Court Rd Solar | SRC Partnership 1, LLC | Woodstock, MD | PJM Interconnection, LLC (PJM) | 3.2 GWh | Sep 2019 | Dec 2025 | Solar |
| Old Trail Wind Farm | Old Trail Wind Farm LLC | Ellsworth, IL | PJM Interconnection, LLC (PJM) | 569.1 GWh | Nov 2007 | Aug 2026 | Wind |
| O H Hutchings | Kimura Power LLC | Miamisburg, OH | PJM Interconnection, LLC (PJM) | 922.0 MWh | Jun 1948 | Dec 2025 | Natural Gas : 99.0% Distillate Fuel Oil : 1.0% |
| OlivePV | Indiana Michigan Power Co | New Carlisle, IN | PJM Interconnection, LLC (PJM) | 8.3 GWh | Jul 2016 | Aug 2026 | Solar |
| Olmstead II CSG | Olmstead Solar II, LLC | Lena, IL | PJM Interconnection, LLC (PJM) | 4.5 GWh | Aug 2021 | Dec 2025 | Solar |
| Onyx - Allen Harim | Onyx Asset Services Group | Harbeson, DE | PJM Interconnection, LLC (PJM) | 1.7 GWh | Mar 2017 | Dec 2025 | Solar |
| Ontelaunee Energy Center | Ontelaunee Energy Center | Reading, PA | PJM Interconnection, LLC (PJM) | 3.7 TWh | Apr 2002 | Aug 2026 | Natural Gas |
| Onancock Diesel Generation Facility | Old Dominion Electric Coop | Onancock, VA | PJM Interconnection, LLC (PJM) | 578.0 MWh | Oct 2002 | Dec 2025 | Distillate Fuel Oil |
| OER Checkerspot | Standard Solar | Tracy's Landing, MD | PJM Interconnection, LLC (PJM) | 3.0 GWh | Nov 2021 | Dec 2025 | Solar |
Summary of Power Plants By State
Figures are based on August 2026 generation numbers.| State | Rank | Active Plants | Aug 2026 Generation |
|---|---|---|---|
| Alabama | # 9 | 80 | 13,897.78 GWh |
| Alaska | # 48 | 146 | 672.99 GWh |
| Arizona | # 10 | 203 | 13,589.64 GWh |
| Arkansas | # 23 | 122 | 7,027.75 GWh |
| California | # 3 | 1,840 | 24,164.86 GWh |
| Colorado | # 30 | 321 | 5,322.30 GWh |
| Connecticut | # 34 | 180 | 4,400.98 GWh |
| Delaware | # 49 | 35 | 555.40 GWh |
| District of Columbia | # 51 | 19 | 21.71 GWh |
| Florida | # 2 | 345 | 28,185.93 GWh |
| Georgia | # 6 | 261 | 15,282.60 GWh |
| Hawaii | # 47 | 73 | 863.62 GWh |
| Idaho | # 43 | 152 | 1,754.56 GWh |
| Illinois | # 5 | 556 | 18,683.36 GWh |
| Indiana | # 17 | 226 | 9,970.06 GWh |
| Iowa | # 27 | 301 | 5,759.64 GWh |
| Kansas | # 26 | 191 | 6,368.18 GWh |
| Kentucky | # 21 | 63 | 7,221.26 GWh |
| Louisiana | # 14 | 93 | 10,670.45 GWh |
| Maine | # 45 | 250 | 1,285.31 GWh |
| Maryland | # 37 | 236 | 3,745.22 GWh |
| Massachusetts | # 41 | 679 | 1,958.59 GWh |
| Michigan | # 12 | 288 | 12,064.19 GWh |
| Minnesota | # 32 | 794 | 5,047.38 GWh |
| Mississippi | # 19 | 62 | 8,358.70 GWh |
| Missouri | # 22 | 134 | 7,125.71 GWh |
| State | Rank | Active Plants | Aug 2026 Generation |
|---|---|---|---|
| Montana | # 40 | 72 | 2,266.60 GWh |
| Nebraska | # 39 | 132 | 3,448.00 GWh |
| Nevada | # 29 | 117 | 5,523.31 GWh |
| New Hampshire | # 42 | 60 | 1,901.10 GWh |
| New Jersey | # 25 | 409 | 6,440.88 GWh |
| New Mexico | # 33 | 166 | 4,571.47 GWh |
| New York | # 11 | 1,087 | 13,130.21 GWh |
| North Carolina | # 8 | 921 | 14,263.55 GWh |
| North Dakota | # 38 | 62 | 3,579.89 GWh |
| Ohio | # 7 | 216 | 14,448.49 GWh |
| Oklahoma | # 13 | 153 | 10,965.38 GWh |
| Oregon | # 31 | 292 | 5,257.14 GWh |
| Pennsylvania | # 4 | 270 | 23,772.83 GWh |
| Rhode Island | # 46 | 108 | 924.31 GWh |
| South Carolina | # 16 | 214 | 9,989.71 GWh |
| South Dakota | # 44 | 53 | 1,486.65 GWh |
| Tennessee | # 18 | 101 | 8,430.26 GWh |
| Texas | # 1 | 1,069 | 65,726.98 GWh |
| Utah | # 36 | 131 | 4,074.82 GWh |
| Vermont | # 50 | 118 | 175.56 GWh |
| Virginia | # 15 | 255 | 10,241.54 GWh |
| Washington | # 20 | 137 | 8,189.60 GWh |
| West Virginia | # 28 | 41 | 5,593.74 GWh |
| Wisconsin | # 24 | 272 | 6,683.19 GWh |
| Wyoming | # 35 | 71 | 4,322.19 GWh |