Directory of Power Plants in the United States
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Orchard Avenue 1 | Yakima-Tieton Irrigation Dist | Yakima, WA | PacifiCorp West (PACW) | 2.9 GWh | Feb 1987 | Oct 2025 | Water |
| Omega Hills Gas Recovery | WM Renewable Energy LLC | Germantown, WI | Midcontinent Independent System Operator, Inc. (MISO) | 77.8 GWh | Nov 1985 | May 2026 | Landfill Gas |
| Oneida Herkimer | WM Renewable Energy LLC | Boonville, NY | New York Independent System Operator (NYIS) | 25.3 GWh | Mar 2012 | Dec 2024 | Landfill Gas |
| Onion River | Wisconsin Power & Light Co | Sheboygan Cedar Grove, WI | Midcontinent Independent System Operator, Inc. (MISO) | 259.6 GWh | Nov 2023 | May 2026 | Solar |
| Oil Dri 2 Solar | Westbound Solar LLC | Ochlocknee, GA | Southern Company Services, Inc. - Trans (SOCO) | 2.6 GWh | Apr 2019 | Dec 2025 | Solar |
| Overlook | Westbound Solar 3, LLC | Westminster, MA | ISO New England (ISNE) | 6.8 GWh | Feb 2023 | Dec 2025 | Solar |
| Oak Ridge LFGTE | Wabash Valley Power Assn, Inc | Logansport, IN | Midcontinent Independent System Operator, Inc. (MISO) | 23.0 GWh | Nov 2003 | Dec 2025 | Landfill Gas |
| Oak Hill - Dry Creek | Vistra Zero LLC | Henderson, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 103.1 GWh | - | May 2026 | Solar |
| Oceana Solar | Virginia Electric & Power Co | Virginia Beach, VA | PJM Interconnection, LLC (PJM) | 29.8 GWh | Nov 2017 | Dec 2025 | Solar |
| Oak Bluffs Diesel Generating Facility | Vineyard Reliability LLC | Oak Bluffs, MA | ISO New England (ISNE) | 2.9 GWh | Dec 1968 | Sep 2025 | Distillate Fuel Oil |
| 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% |
| Old Hickory | USCE-Nashville District | Hendersonville, TN | Tennessee Valley Authority (TVA) | 324.7 GWh | Mar 1957 | Dec 2025 | Water |
| Ozark | USCE-Little Rock District | Ozark, AR | Southwestern Power Administration (SPA) | 314.7 GWh | Oct 1972 | Dec 2024 | Water |
| Oahe | USACE-Omaha | Pierre, SD | Southwest Power Pool (SWPP) | 2.0 TWh | Mar 1962 | Dec 2025 | Water |
| O'Fallon Renewable Energy Center | Union Electric Co - (MO) | O'Fallon, MO | Midcontinent Independent System Operator, Inc. (MISO) | 1.1 GWh | Nov 2014 | Aug 2025 | Solar |
| Osage Dam | Union Electric Co - (MO) | Eldon, MO | Midcontinent Independent System Operator, Inc. (MISO) | 498.9 GWh | Sep 1931 | Dec 2025 | Water |
| Oso Grande Wind Farm | Tucson Electric Power Co | Maljamar, NM | Tucson Electric Power (TEPC) | 560.7 GWh | Apr 2021 | May 2026 | Wind |
| Orange Street G1 | Town of Bedford - (VA) | Bedford, VA | PJM Interconnection, LLC (PJM) | 269.0 MWh | Jun 2005 | Dec 2025 | Distillate Fuel Oil |
| Oskaloosa | Today's Power, Inc. | Oskaloosa, KS | Southwest Power Pool (SWPP) | 2.1 GWh | Apr 2021 | Dec 2025 | Solar |
| Ozark Solar Park | Today's Power, Inc. | Lincoln, AR | Southwest Power Pool (SWPP) | 4.1 GWh | Jun 2021 | Dec 2025 | Solar |
| Otarre Solar Park | TIG Sun Energy IV, LLC | Cayce, SC | Dominion Energy South Carolina, Inc. (SCEG) | 2.8 GWh | Nov 2017 | Dec 2025 | Solar |
| OTHERTraditionClearfork | Texas Microgrid, LLC | Fort Worth, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 233.0 MWh | Mar 2023 | Dec 2025 | Natural Gas |
| OTHERTraditionBuffalo | Texas Microgrid, LLC | Houston, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 79.0 MWh | May 2024 | Dec 2025 | Natural Gas |
| OTHERTexasA&M | Texas Microgrid, LLC | Bryan, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 1.6 GWh | Apr 2018 | Dec 2025 | Natural Gas |
| OTHERNFBWA | Texas Microgrid, LLC | Houston, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 255.0 MWh | Jan 2021 | Dec 2025 | Natural Gas |
| OTHERCitizensHospital | Texas Microgrid, LLC | Victoria, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 588.0 MWh | Mar 2020 | Dec 2025 | Natural Gas |
| Onondaga County - Metro Water Board | Tesla Inc. | Clay, NY | New York Independent System Operator (NYIS) | 1.1 GWh | Jan 2016 | Dec 2025 | Solar |
| Oswego County - Fulton Solar | Tesla Inc. | Fulton, NY | New York Independent System Operator (NYIS) | 1.5 GWh | May 2018 | Dec 2025 | Solar |
| Onondaga County- Jamesville | Tesla Inc. | Jamesville, NY | New York Independent System Operator (NYIS) | 2.3 GWh | Feb 2018 | Dec 2025 | Solar |
| Onondaga County - Oak Orchard WWTP | Tesla Inc. | Clay, NY | New York Independent System Operator (NYIS) | 2.5 GWh | Oct 2017 | Dec 2024 | Solar |
| Onondaga County- Clearwater | Tesla Inc. | Oswego, NY | ISO New England (ISNE) | 2.5 GWh | Jun 2017 | Dec 2025 | Solar |
| Orange County Solar Farm (NY) | Tesla Inc. | Goshen, NY | ISO New England (ISNE) | 2.3 GWh | Apr 2017 | Dec 2025 | Solar |
| Oneida County- DPW | Tesla Inc. | Oriskany, NY | ISO New England (ISNE) | 1.4 GWh | Sep 2017 | Dec 2025 | Solar |
| Oregon Convention Center | Tesla Inc. | Portland, OR | PacifiCorp West (PACW) | 1.5 GWh | Jun 2016 | Dec 2025 | Solar |
| Oregon University System OIT Klamath Fal | Tesla Inc. | Klamath Falls, OR | PacifiCorp West (PACW) | 2.9 GWh | Dec 2013 | Dec 2025 | Solar |
| Oregon University System Rabbit Field | Tesla Inc. | Corvallis, OR | PacifiCorp West (PACW) | 1.3 GWh | Feb 2014 | Dec 2025 | Solar |
| Orange PV | Terraform Arcadia | Orange, MA | ISO New England (ISNE) | 2.6 GWh | Jun 2013 | Dec 2025 | Solar |
| Oasis Alta | Terra-Gen Operating Co-Wind | Mojave, CA | California Independent System Operator (CISO) | 49.3 GWh | Mar 2021 | Dec 2025 | Wind |
| Oasis Wind | Terra-Gen Operating Co-Wind | Mojave, CA | California Independent System Operator (CISO) | 221.1 GWh | Nov 2004 | Dec 2025 | Wind |
| Oak Creek Energy Systems I | Terra-Gen Operating Co-Wind | Mojave, CA | California Independent System Operator (CISO) | 57.3 GWh | May 1982 | Dec 2025 | Wind |
| Ocoee 3 | Tennessee Valley Authority | Benton, TN | Tennessee Valley Authority (TVA) | 141.3 GWh | Mar 1943 | Dec 2025 | Water |
| Ocoee 1 | Tennessee Valley Authority | Benton, TN | Tennessee Valley Authority (TVA) | 65.6 GWh | Dec 1911 | Dec 2025 | Water |
| Ocoee 2 | Tennessee Valley Authority | Benton, TN | Tennessee Valley Authority (TVA) | 98.1 GWh | Sep 1913 | Dec 2025 | Water |
| OYA Pulaski | SunStrong Management, LLC | Pulaski, NY | New York Independent System Operator (NYIS) | 6.9 GWh | Oct 2022 | Dec 2025 | Solar |
| OYA Robinson Road | SunStrong Management, LLC | Orleans, NY | New York Independent System Operator (NYIS) | 10.2 GWh | May 2022 | Dec 2025 | Solar |
| OYA Wayside Drive | SunStrong Management, LLC | Watertown, NY | New York Independent System Operator (NYIS) | 10.4 GWh | Sep 2022 | Dec 2025 | Solar |
| OYA State Route 122 | SunStrong Management, LLC | Constable, NY | New York Independent System Operator (NYIS) | 10.1 GWh | Nov 2021 | Dec 2025 | Solar |
| Odyssey Solar | SunStrong Management | Pelion, SC | Dominion Energy South Carolina, Inc. (SCEG) | 13.3 GWh | Jul 2017 | Dec 2025 | Solar |
| OSLH, LLC | SunStrong Management | Bend, OR | PacifiCorp West (PACW) | 20.7 GWh | Nov 2016 | Dec 2025 | Solar |
| Oakwood Solar | SunStrong Management | Mebane, NC | Duke Energy Carolinas (DUK) | 9.8 GWh | May 2021 | Dec 2025 | Solar |
| Overman Solar | SunStrong Management | Goldsboro, NC | Duke Energy Progress East (CPLE) | 10.8 GWh | Nov 2021 | Dec 2025 | Solar |
| Old Wire Farm | Strata Manager, LLC | Laurel Hill, NC | Duke Energy Progress East (CPLE) | 9.8 GWh | Nov 2016 | Dec 2025 | Solar |
| Overhill Solar | Strata Manager, LLC | Clinton, NC | Duke Energy Carolinas (DUK) | 10.1 GWh | Feb 2022 | Dec 2025 | Solar |
| Ouchchy PV1 | Strata Manager, LLC | Mebane, NC | Duke Energy Carolinas (DUK) | 5.2 GWh | Nov 2015 | Dec 2025 | Solar |
| Old Catawba PV 1 | Strata Manager, LLC | Claremont, NC | Duke Energy Carolinas (DUK) | 5.5 GWh | Nov 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 |
| OER Checkerspot | Standard Solar | Tracy's Landing, MD | PJM Interconnection, LLC (PJM) | 3.0 GWh | Nov 2021 | Dec 2025 | Solar |
| Owatonna Energy Station | Southern Minnesota Mun P Agny | Owatonna, MN | Midcontinent Independent System Operator, Inc. (MISO) | 2.3 GWh | Feb 2018 | Dec 2025 | Natural Gas |
| Oak Hill Solar Array | Southern Indiana Gas & Elec Co | Evansville, IN | Midcontinent Independent System Operator, Inc. (MISO) | 3.2 GWh | Oct 2018 | Dec 2025 | Solar |
| Old Plank Road Solar Farm, LLC | Southeastern Solar Farm Fund, LLC | Jacksonville, FL | JEA (JEA) | 5.3 GWh | Sep 2017 | Dec 2025 | Solar |
| Orange Coast College PH2 Solar Project | Solar Star Coastal Pirate, LLC | Costa Mesa, CA | California Independent System Operator (CISO) | 4.0 GWh | Apr 2022 | Dec 2025 | Solar |
| Ontario LFGTE | Seneca Energy II | Stanley, NY | New York Independent System Operator (NYIS) | 77.7 GWh | Oct 2003 | Dec 2025 | Landfill Gas |
| OCI Alamo 7 LLC | RWE Clean Energy | Haskell, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 231.6 GWh | Jul 2016 | Dec 2025 | Solar |
| OCI Alamo 5 LLC | RWE Clean Energy | Uvalde, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 159.1 GWh | Nov 2015 | Dec 2025 | Solar |
| OCI Alamo 4, LLC | RWE Clean Energy | Brackettville, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 70.5 GWh | Jul 2014 | Dec 2025 | Solar |
| OCI Alamo 3 LLC | RWE Clean Energy | San Antonio, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 9.6 GWh | Nov 2014 | Dec 2025 | Solar |
| Oak Tree Energy | RWE Clean Energy | Clark, SD | Southwest Power Pool (SWPP) | 65.8 GWh | Nov 2014 | Dec 2025 | Wind |
| Oro Loma | RWE Clean Energy | Oro Loma, CA | California Independent System Operator (CISO) | 49.2 GWh | Dec 2016 | Dec 2025 | Solar |
| Open Sky Dairy | Renewable Solar, Inc | Riverdale, CA | California Independent System Operator (CISO) | 418.8 MWh | Jun 2024 | Dec 2025 | Solar |
| Oxnard | Procter&Gamble Paper Products Co-Oxnard | Oxnard, CA | California Independent System Operator (CISO) | 425.0 GWh | Jun 1982 | May 2026 | Natural Gas |
| Oak Grove | Portland General Electric Co | Estacada, OR | Portland General Electric Company (PGE) | 142.1 GWh | Jul 1924 | Dec 2025 | Water |
| Otero Solar | PNM Resources | La Luz, NM | Public Service Company of New Mexico (PNM) | 17.6 GWh | Nov 2013 | Dec 2025 | Solar |
| Oxbow (CA) | Placer County Water Agency - (CA) | Foresthill, CA | California Independent System Operator (CISO) | 23.2 GWh | Sep 1966 | Dec 2025 | Water |
| Ocotillo Express LLC | Pattern Operators LP | Ocotillo, CA | California Independent System Operator (CISO) | 372.2 GWh | Nov 2012 | May 2026 | Wind |
| One Market Plaza | Paramount Group Inc | San Francisco, CA | California Independent System Operator (CISO) | 1.2 GWh | Nov 2003 | Dec 2025 | Natural Gas |
| Oneida | PacifiCorp | Riverdale, ID | PacifiCorp East (PACE) | 39.4 GWh | Jun 1915 | Dec 2025 | Water |
| Ozarks Natural Energy Community Solar | Ozarks Electric Coop Corp - (AR) | Springdale, AR | Southwest Power Pool (SWPP) | 2.1 GWh | Mar 2016 | Dec 2025 | Solar |
| OYA Main Street | OYA Main Street LLC | York, NY | New York Independent System Operator (NYIS) | 6.7 GWh | Nov 2022 | Dec 2025 | Solar |
| OYA Church Road | OYA Church Road A LLC | Baldwinsville, NY | New York Independent System Operator (NYIS) | 8.6 GWh | Nov 2022 | Dec 2025 | Solar |
| Oxy Renewable Energy - Goldsmith | Oxy Renewable Energy LLC | Goldsmith, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 38.8 GWh | Apr 2020 | 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 |
| Oxbow Creek | Oxbow Creek Energy LLC | Factoryville, PA | PJM Interconnection, LLC (PJM) | 40.6 GWh | Nov 2019 | Dec 2025 | Natural Gas |
| Owlville Creek Solar, LLC | Owlville Creek Solar, LLC | Canastota, NY | New York Independent System Operator (NYIS) | 8.4 GWh | Nov 2020 | Dec 2025 | Solar |
| Owlville Creek Solar 2, LLC | Owlville Creek Solar 2, LLC | Canastota, NY | New York Independent System Operator (NYIS) | 7.8 GWh | Nov 2020 | Dec 2024 | Solar |
| Owen Solar | Owen Solar LLC | Lincolnton, NC | Duke Energy Carolinas (DUK) | 6.9 GWh | Mar 2016 | Dec 2025 | Solar |
| Outback Solar At Christmas Valley | Outback Solar, LLC | Christmas Valley, OR | Bonneville Power Administration (BPAT) | 8.8 GWh | Sep 2012 | Dec 2025 | Solar |
| Otter Creek Ethanol Poet - Ashton | Otter Creek Ethanol LLC - Poet Ashton | Ashton, IA | Midcontinent Independent System Operator, Inc. (MISO) | 44.6 GWh | Feb 2004 | May 2026 | Natural Gas |
| Otsego Mill Power Plant | Otsego Paper Inc | Otsego, MI | Midcontinent Independent System Operator, Inc. (MISO) | 162.5 GWh | Oct 1995 | Dec 2025 | Natural Gas |
| Otis Elevator Company Solar | Otis Elevator Company | Florence, SC | Duke Energy Carolinas (DUK) | 1.7 GWh | Apr 2018 | Dec 2025 | Solar |
| Otay Mesa Generating Project | Otay Mesa Energy Center LLC | San Diego, CA | California Independent System Operator (CISO) | 1.3 TWh | Sep 2009 | May 2026 | Natural Gas |
| Oswego Harbor Power | Oswego Harbor Power | Oswego, NY | New York Independent System Operator (NYIS) | 130.8 GWh | May 1975 | Feb 2026 | Residual Fuel Oil : 98.0% Natural Gas : 2.0% |
| Oswego County Energy Recovery | Oswego County - (NY) | Fulton, NY | New York Independent System Operator (NYIS) | 5.6 GWh | Jan 1986 | Dec 2025 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Osceola Windpower LLC | Osceola Windpower LLC | Harris, IA | Southwest Power Pool (SWPP) | 383.8 GWh | Jun 2008 | May 2026 | Wind |
| Osceola Windpower II | Osceola Windpower II | Harris, IA | Midcontinent Independent System Operator, Inc. (MISO) | 191.2 GWh | Aug 2008 | May 2026 | Wind |
| Osborn Wind Energy | Osborn Wind Energy LLC | Stewartsville, MO | Southwest Power Pool (SWPP) | 690.2 GWh | Nov 2016 | May 2026 | Wind |
| Orrtanna | Orrtanna Power, LLC | Orrtanna, PA | PJM Interconnection, LLC (PJM) | 417.0 MWh | Apr 1971 | Dec 2025 | Distillate Fuel Oil |
| Ormond Beach | Ormond Beach Power, LLC | Oxnard, CA | California Independent System Operator (CISO) | 4.9 GWh | Jul 1971 | May 2026 | Natural Gas |
| OREG 1 Inc | Ormat Nevada Inc | Culbertson, MT | Southwest Power Pool (SWPP) | 124.0 GWh | Jun 2006 | May 2026 | Waste Heat |
| OREG 3 Inc | Ormat Nevada Inc | Trimont, MN | Midcontinent Independent System Operator, Inc. (MISO) | 42.9 GWh | Jul 2010 | May 2026 | Waste Heat |
Summary of Power Plants By State
Figures are based on May 2026 generation numbers.| State | Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Alabama | # 8 | 77 | 11,823.92 GWh |
| Alaska | # 48 | 140 | 513.29 GWh |
| Arizona | # 14 | 196 | 9,091.99 GWh |
| Arkansas | # 25 | 117 | 4,873.33 GWh |
| California | # 4 | 1,740 | 15,360.54 GWh |
| Colorado | # 31 | 308 | 4,156.36 GWh |
| Connecticut | # 35 | 173 | 3,391.33 GWh |
| Delaware | # 49 | 35 | 236.45 GWh |
| District of Columbia | # 51 | 17 | 14.46 GWh |
| Florida | # 2 | 342 | 25,093.89 GWh |
| Georgia | # 6 | 250 | 12,138.02 GWh |
| Hawaii | # 46 | 70 | 762.50 GWh |
| Idaho | # 41 | 151 | 1,963.84 GWh |
| Illinois | # 5 | 494 | 14,816.74 GWh |
| Indiana | # 15 | 222 | 7,662.28 GWh |
| Iowa | # 21 | 297 | 5,720.38 GWh |
| Kansas | # 24 | 188 | 5,118.39 GWh |
| Kentucky | # 23 | 61 | 5,471.28 GWh |
| Louisiana | # 13 | 90 | 9,131.60 GWh |
| Maine | # 44 | 242 | 1,130.78 GWh |
| Maryland | # 37 | 228 | 3,103.37 GWh |
| Massachusetts | # 45 | 666 | 1,073.93 GWh |
| Michigan | # 11 | 276 | 9,774.25 GWh |
| Minnesota | # 28 | 790 | 4,567.82 GWh |
| Mississippi | # 20 | 60 | 6,404.61 GWh |
| Missouri | # 22 | 129 | 5,701.36 GWh |
| State | Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Montana | # 40 | 71 | 2,053.07 GWh |
| Nebraska | # 36 | 126 | 3,193.89 GWh |
| Nevada | # 33 | 117 | 3,848.29 GWh |
| New Hampshire | # 43 | 57 | 1,198.65 GWh |
| New Jersey | # 30 | 398 | 4,274.91 GWh |
| New Mexico | # 29 | 158 | 4,513.39 GWh |
| New York | # 10 | 1,064 | 10,643.78 GWh |
| North Carolina | # 9 | 913 | 11,481.42 GWh |
| North Dakota | # 34 | 59 | 3,601.34 GWh |
| Ohio | # 7 | 211 | 11,886.21 GWh |
| Oklahoma | # 17 | 144 | 7,547.66 GWh |
| Oregon | # 27 | 281 | 4,575.23 GWh |
| Pennsylvania | # 3 | 258 | 18,234.28 GWh |
| Rhode Island | # 47 | 107 | 580.94 GWh |
| South Carolina | # 16 | 209 | 7,632.32 GWh |
| South Dakota | # 42 | 53 | 1,802.78 GWh |
| Tennessee | # 19 | 99 | 6,454.94 GWh |
| Texas | # 1 | 1,019 | 50,690.02 GWh |
| Utah | # 39 | 128 | 2,809.26 GWh |
| Vermont | # 50 | 118 | 186.37 GWh |
| Virginia | # 18 | 250 | 7,445.56 GWh |
| Washington | # 12 | 134 | 9,231.20 GWh |
| West Virginia | # 32 | 41 | 4,142.41 GWh |
| Wisconsin | # 26 | 266 | 4,582.07 GWh |
| Wyoming | # 38 | 69 | 2,983.81 GWh |