Directory of Power Plants in the United States

List of All United States Power Plants

Displaying Results 1 to 100 of 338
Plant NameUtilityLocationBalancing AuthorityAnnual GenerationPlant DateLast UpdateFuel Types
Okeelanta CogenerationNew Hope Power CompanySouth Bay, FLFlorida Power & Light Co. (FPL)51.4 GWhDec 1995Sep 2025 Agricultural By-Products : 97.8% Natural Gas : 2.2%
OrrvilleCity of Orrville - (OH)Orrville, OHPJM Interconnection, LLC (PJM)22.0 GWhDec 1948Aug 2024 Bituminous Coal : 51.7% Natural Gas : 48.3%
Oak Bluffs Diesel Generating FacilityVineyard Reliability LLCOak Bluffs, MAISO New England (ISNE)2.1 GWhDec 1968Dec 2024 Distillate Fuel Oil
Orange Street G1Town of Bedford - (VA)Bedford, VAPJM Interconnection, LLC (PJM)168.0 MWhJun 2005Dec 2024 Distillate Fuel Oil
OgdenCity of Ogden - (IA)Ogden, IAMidcontinent Independent System Operator, Inc. (MISO)10.0 MWhJun 1951Dec 2024 Distillate Fuel Oil
Oxford (KS)City of Oxford - (KS)Oxford, KSSouthwest Power Pool (SWPP)10.0 MWhJun 1999Dec 2024 Distillate Fuel Oil
OrcaCordova Electric Coop, IncCordova, AK4.2 GWhSep 1984Dec 2024 Distillate Fuel Oil
OrdCity of Ord - (NE)Ord, NESouthwest Power Pool (SWPP)106.0 MWhDec 1962Dec 2024 Distillate Fuel Oil
Onancock Diesel Generation FacilityOld Dominion Electric CoopOnancock, VAPJM Interconnection, LLC (PJM)264.0 MWhOct 2002Dec 2024 Distillate Fuel Oil
Orrville PeakingAmerican Mun Power-Ohio, IncOrrville, OHPJM Interconnection, LLC (PJM)209.0 MWhJun 1999Dec 2024 Distillate Fuel Oil
Oberlin (KS)City of Oberlin - (KS)Oberlin, KSSouthwest Power Pool (SWPP)11.8 MWhDec 1953Dec 2024 Distillate Fuel Oil
Osawatomie City ofCity of Osawatomie - (KS)Osawatomie, KSSouthwest Power Pool (SWPP)10.0 MWhSep 1950Dec 2023 Distillate Fuel Oil
Osawatomie Power Plant North SubCity of Osawatomie - (KS)Osawatomie, KSSouthwest Power Pool (SWPP)27.0 MWhApr 2018Dec 2024 Distillate Fuel Oil
Overall Road StationCity of Farmington - (MO)Farmington, MOMidcontinent Independent System Operator, Inc. (MISO)26.0 MWhFeb 2003Dec 2024 Distillate Fuel Oil
Osawatomie Power Plant South SubCity of Osawatomie - (KS)Osawatomie, KSSouthwest Power Pool (SWPP)30.0 MWhFeb 2017Dec 2024 Distillate Fuel Oil
Old FaithfulNorthWestern Energy (MT wind/thermal)Yellowstone, WYNorthWestern Corporation (NWMT)273.0 MWhNov 1979Dec 2024 Distillate Fuel Oil
OsborneCity of Osborne - (KS)Osborne, KSSouthwest Power Pool (SWPP)15.7 MWhMay 1957Dec 2024 Distillate Fuel Oil : 80.6% Natural Gas : 19.4%
Ormesa IOrmat Nevada IncHoltville, CAImperial Irrigation District (IID)70.2 GWhNov 1986Dec 2024 Geothermal
Ormesa IIOrmat Nevada IncHoltville, CAImperial Irrigation District (IID)131.7 GWhApr 1989Dec 2024 Geothermal
Ormesa IIIOrmat Nevada IncHoltville, CAImperial Irrigation District (IID)44.4 GWhApr 1989Dec 2024 Geothermal
Oak Ridge LFGTEWabash Valley Power Assn, IncLogansport, INMidcontinent Independent System Operator, Inc. (MISO)25.8 GWhNov 2003Dec 2024 Landfill Gas
Ocean County LandfillNextEra Renewable Fuels, LLCManchester, NJPJM Interconnection, LLC (PJM)64.3 GWhJan 1997Dec 2024 Landfill Gas
Ontario LFGTESeneca Energy IIStanley, NYNew York Independent System Operator (NYIS)68.5 GWhOct 2003Dec 2024 Landfill Gas
Onslow Power ProducersCube District Energy, LLCJacksonville, NCDuke Energy Carolinas (DUK)13.2 GWhOct 2013Dec 2024 Landfill Gas
Oak Grove Power ProducersCube District Energy, LLCArcadia, KSSouthwest Power Pool (SWPP)8.2 GWhFeb 2010Dec 2024 Landfill Gas
Oneida HerkimerWM Renewable Energy LLCBoonville, NYNew York Independent System Operator (NYIS)25.3 GWhMar 2012Dec 2024 Landfill Gas
Omega Hills Gas RecoveryWM Renewable Energy LLCGermantown, WIMidcontinent Independent System Operator, Inc. (MISO)80.1 GWhNov 1985Sep 2025 Landfill Gas
Onalaska Campus Landfill BiogasGundersen Lutheran Biogas I LLCOnalaska, WIMidcontinent Independent System Operator, Inc. (MISO)4.3 GWhFeb 2012Dec 2024 Landfill Gas
Oak Grove (TX)Luminant Generation Company LLCFranklin, TXElectric Reliability Council of Texas, Inc. (ERCO)11.0 TWhMar 2010Sep 2025 Lignite Coal : 99.0% Natural Gas : 1.0%
OTHERCitizensHospitalTexas Microgrid, LLCVictoria, TXElectric Reliability Council of Texas, Inc. (ERCO)625.0 MWhMar 2020Dec 2024 Natural Gas
Oxbow CreekOxbow Creek Energy LLCFactoryville, PAPJM Interconnection, LLC (PJM)41.0 GWhNov 2019Dec 2024 Natural Gas
OTHERBenEKDallasGenerate ER-NG, LLCDallas, TXElectric Reliability Council of Texas, Inc. (ERCO)198.0 MWhApr 2023Dec 2024 Natural Gas
Otter Creek Ethanol Poet - AshtonOtter Creek Ethanol LLC - Poet AshtonAshton, IAMidcontinent Independent System Operator, Inc. (MISO)43.5 GWhFeb 2004Sep 2025 Natural Gas
Ontelaunee Energy CenterOntelaunee Energy CenterReading, PAPJM Interconnection, LLC (PJM)4.1 TWhApr 2002Sep 2025 Natural Gas
Otsego Mill Power PlantOtsego Paper IncOtsego, MIMidcontinent Independent System Operator, Inc. (MISO)165.5 GWhOct 1995Dec 2024 Natural Gas
OTHERNFBWATexas Microgrid, LLCHouston, TXElectric Reliability Council of Texas, Inc. (ERCO)321.0 MWhJan 2021Dec 2024 Natural Gas
OTHERTraditionClearforkTexas Microgrid, LLCFort Worth, TXElectric Reliability Council of Texas, Inc. (ERCO)205.0 MWhMar 2023Dec 2024 Natural Gas
OuachitaEntergy Louisiana LLCSterlington, LAMidcontinent Independent System Operator, Inc. (MISO)4.3 TWhJul 2002Sep 2025 Natural Gas
OTHERTexasA&MTexas Microgrid, LLCBryan, TXElectric Reliability Council of Texas, Inc. (ERCO)1.3 GWhApr 2018Dec 2024 Natural Gas
OTHERTraditionBuffaloTexas Microgrid, LLCHouston, TXElectric Reliability Council of Texas, Inc. (ERCO)202.0 MWhMay 2024Dec 2024 Natural Gas
O H HutchingsKimura Power LLCMiamisburg, OHPJM Interconnection, LLC (PJM)397.0 MWhJun 1948Dec 2024 Natural Gas
OwatonnaCity of Owatonna - (MN)Owatonna, MNMidcontinent Independent System Operator, Inc. (MISO)1.4 GWhMar 1982Dec 2023 Natural Gas
Owatonna Energy StationSouthern Minnesota Mun P AgnyOwatonna, MNMidcontinent Independent System Operator, Inc. (MISO)13.4 GWhFeb 2018Dec 2024 Natural Gas
OxnardProcter&Gamble Paper Products Co-OxnardOxnard, CACalifornia Independent System Operator (CISO)479.4 GWhJun 1982Sep 2025 Natural Gas
Oak Point CogenChevron Oronite Co LLCBelle Chasse, LAMidcontinent Independent System Operator, Inc. (MISO)99.2 GWhSep 1999Dec 2024 Natural Gas
Oxnard Paper MillNew-Indy, Oxnard LLCOxnard, CACalifornia Independent System Operator (CISO)133.9 GWhFeb 1986Sep 2025 Natural Gas
O W SommersCity of San Antonio - (TX)San Antonio, TXElectric Reliability Council of Texas, Inc. (ERCO)2.5 TWhMar 1972Dec 2024 Natural Gas
Osprey Energy Center Power PlantDuke Energy Florida, LLCAuburndale, FLTampa Electric Company (TEC)3.8 TWhApr 2004Sep 2025 Natural Gas
Otay Mesa Generating ProjectOtay Mesa Energy Center LLCSan Diego, CACalifornia Independent System Operator (CISO)1.8 TWhSep 2009Sep 2025 Natural Gas
One PatriotBloom EnergyFoxborough, MAISO New England (ISNE)16.3 GWhNov 2019Dec 2024 Natural Gas
Oneta Energy CenterOneta Power LLCBroken Arrow, OKSouthwest Power Pool (SWPP)5.1 TWhJun 2002Sep 2025 Natural Gas
Opryland USAGaylord Entertainment CoNashville, TNTennessee Valley Authority (TVA)6.6 GWhJun 1995Sep 2025 Natural Gas
One Market PlazaParamount Group IncSan Francisco, CACalifornia Independent System Operator (CISO)177.0 MWhNov 2003Dec 2024 Natural Gas
Orange Cogeneration FacilityNorthern Star Generation Services Co LLCBartow, FLDuke Energy Florida, Inc. (FPC)387.5 GWhJan 1995Dec 2024 Natural Gas
Olive View Medical CenterLos Angeles County DHSSylmar, CALos Angeles Department of Water and Power (LDWP)11.4 GWhJan 1987Feb 2024 Natural Gas
Orange Grove Peaking FacilityOrange Grove Energy LPPala, CACalifornia Independent System Operator (CISO)23.6 GWhMay 2010Dec 2024 Natural Gas
Orbit Bloom Fuel CellDG Fuel Cell, LLCMedford, NYNew York Independent System Operator (NYIS)45.6 GWhJul 2020Dec 2024 Natural Gas
Oregon Clean Energy CenterOregon Clean Energy CenterOregon, OHPJM Interconnection, LLC (PJM)5.9 TWhJun 2017Sep 2025 Natural Gas
Okeechobee Clean Energy CenterFlorida Power & Light CoOkeechobee, FLFlorida Power & Light Co. (FPL)11.7 TWhFeb 2019Sep 2025 Natural Gas
Orlando Cogen LPFlorida Municipal Power AgencyOrlando, FLDuke Energy Florida, Inc. (FPC)704.8 GWhAug 1993Dec 2024 Natural Gas
Ormond BeachOrmond Beach Power, LLCOxnard, CACalifornia Independent System Operator (CISO)43.1 GWhJul 1971Aug 2025 Natural Gas
Oroville Cogeneration LPApex Power Generation Corp.Oroville, CACalifornia Independent System Operator (CISO)672.3 MWhDec 1989Dec 2024 Natural Gas
OsawatomieEvergy MetroMiami, KSSouthwest Power Pool (SWPP)58.8 GWhMay 2003Dec 2024 Natural Gas
Odyssey Energy Altura Cogen, LLCOdyssey Operating ServicesChannelview, TXElectric Reliability Council of Texas, Inc. (ERCO)3.7 TWhOct 1985Sep 2025 Natural Gas
Odessa-Ector Power PlantLaFrontera Holdings LLCOdessa, TXElectric Reliability Council of Texas, Inc. (ERCO)7.9 TWhJun 2001Sep 2025 Natural Gas
Oregon State University Energy CenterOregon State UniversityCorvallis, ORBonneville Power Administration (BPAT)38.7 GWhMay 2010Aug 2025 Natural Gas
OcotilloArizona Public Service CoTempe, AZArizona Public Service Company (AZPS)473.2 GWhFeb 1960Sep 2025 Natural Gas
OttawaCity of Ottawa - (KS)Ottawa, KSSouthwest Power Pool (SWPP)689.0 MWhNov 1958Dec 2024 Natural Gas : 74.5% Distillate Fuel Oil : 25.5%
Osceola Generating Station (FL)Orlando Utilities CommSt. Cloud, FLDuke Energy Florida, Inc. (FPC)623.0 MWhNov 2001Dec 2024 Natural Gas : 87.4% Distillate Fuel Oil : 12.6%
Oberlin (OH)City of Oberlin - (OH)Oberlin, OHPJM Interconnection, LLC (PJM)634.0 MWhDec 1947Dec 2024 Natural Gas : 87.7% Distillate Fuel Oil : 12.3%
Oxford (NE)Village of Oxford - (NE)Oxford, NESouthwest Power Pool (SWPP)27.0 MWhJul 1953Dec 2024 Natural Gas : 89.8% Distillate Fuel Oil : 10.2%
Orchard ParkBorough of ChambersburgChambersburg, PAPJM Interconnection, LLC (PJM)41.0 GWhNov 2003Sep 2025 Natural Gas : 94.9% Distillate Fuel Oil : 5.1%
Oyster Creek Unit VIIIDow Chemical Company-Oyster Creek VIIIFreeport, TXElectric Reliability Council of Texas, Inc. (ERCO)2.3 TWhSep 1994Sep 2025 Natural Gas : 99.8%
Ocean State PowerOcean State Power CoHarrisville, RIISO New England (ISNE)1.2 TWhNov 1990Dec 2024 Natural Gas : 99.9%
Oleander Power Project LPOleander Holdings LLCCocoa, FLFlorida Power & Light Co. (FPL)488.9 GWhMay 2002Dec 2024 Natural Gas : 99.9%
Ocean State Power IIOcean State Power IIHarrisville, RIISO New England (ISNE)896.8 GWhSep 1991Dec 2024 Natural Gas : 99.9%
Onondaga County Resource RecoveryCovanta Onondega LPJamesville, NYNew York Independent System Operator (NYIS)206.3 GWhOct 1994Sep 2025 Non-biogenic Municipal Solid Waste : 54.5% Biogenic Municipal Solid Waste : 44.6% Natural Gas : 0.9%
Olmsted Waste EnergyOlmsted County Public WorksRochester, MNMidcontinent Independent System Operator, Inc. (MISO)46.7 GWhMar 1987Dec 2024 Non-biogenic Municipal Solid Waste : 54.7% Biogenic Municipal Solid Waste : 44.7% Natural Gas : 0.5%
Oswego County Energy RecoveryOswego CountyFulton, NYNew York Independent System Operator (NYIS)8.1 GWhJan 1986Dec 2024 Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
OconeeDuke Energy Carolinas, LLCSeneca, SCDuke Energy Carolinas (DUK)22.6 TWhJun 1973Sep 2025 Nuclear
Orbit Energy CharlotteAnaergiaCharlotte, NCDuke Energy Carolinas (DUK)199.9 MWhOct 2016Dec 2024 Other Biomass Gas
Orbit Energy RIAnaergiaJohnston, RIISO New England (ISNE)144.0 MWhJun 2017Dec 2024 Other Biomass Gas
OES Biogas PowerOrganic Energy Solutions, Inc.San Bernardino, CACalifornia Independent System Operator (CISO)4.9 GWh-Dec 2024 Other Biomass Gas
Oxnard Wastewater Treatment PlantOxnard City ofOxnard, CACalifornia Independent System Operator (CISO)4.2 GWhJul 1981Sep 2025 Other Biomass Gas : 95.1% Natural Gas : 4.9%
Oswego Harbor PowerOswego Harbor PowerOswego, NYNew York Independent System Operator (NYIS)91.0 GWhMay 1975Aug 2025 Residual Fuel Oil : 99.5%
Open Sky DairyRenewable Solar, IncRiverdale, CACalifornia Independent System Operator (CISO)2.1 GWhJun 2024Dec 2024 Solar
Oxon Run CREFOxon Run Community Renewable Energy FacilityWashington, DCPJM Interconnection, LLC (PJM)1.5 GWhNov 2021Dec 2024 Solar
Onyx - Lamphear Road CSGOnyx Asset Services GroupRome, NYNew York Independent System Operator (NYIS)2.7 GWhSep 2016Dec 2024 Solar
OR - Solops - SPI 18 - ClayfieldClayfield Solar, LLCEstacada, ORPortland General Electric Company (PGE)202.0 MWhSep 2024Dec 2024 Solar
OR -Solops - SPI 18 - CorkCork Solar, LLCMolalla, ORPortland General Electric Company (PGE)361.0 MWhNov 2024Dec 2024 Solar
OYA State Route 122OYA State Route 122, LLCConstable, NYNew York Independent System Operator (NYIS)6.9 GWhNov 2021Dec 2024 Solar
Onyx - Brockton Thatcher Landfill SolarOnyx Asset Services GroupBrockton, MAISO New England (ISNE)5.1 GWhOct 2017Dec 2024 Solar
OR - Solops - SPI 18 - DoverDover Solar, LLCCanby, ORPortland General Electric Company (PGE)567.0 MWhNov 2024Dec 2024 Solar
Orange Blossom Solar CenterFlorida Power & Light CoVero Beach, FLFlorida Power & Light Co. (FPL)147.7 GWhApr 2021Sep 2025 Solar
Orange Coast College PH2 Solar ProjectSolar Star Coastal Pirate, LLCCosta Mesa, CACalifornia Independent System Operator (CISO)4.0 GWhApr 2022Dec 2024 Solar
OYA Church RoadOYA Church Road A LLCBaldwinsville, NYNew York Independent System Operator (NYIS)8.2 GWhNov 2022Dec 2024 Solar
Orange County Solar Farm (NY)Tesla Inc.Goshen, NYISO New England (ISNE)2.5 GWhApr 2017Dec 2024 Solar
Oxy Renewable Energy - GoldsmithOxy Renewable Energy LLCGoldsmith, TXElectric Reliability Council of Texas, Inc. (ERCO)40.5 GWhApr 2020Dec 2024 Solar
Orange GroveOrange GroveJim Wells, TXElectric Reliability Council of Texas, Inc. (ERCO)112.9 GWh-Sep 2025 Solar
Orange PVTerraform ArcadiaOrange, MAISO New England (ISNE)2.6 GWhJun 2013Dec 2024 Solar

Summary of Power Plants By State

Figures are based on September 2025 generation numbers.
StateRankActive PlantsSep 2025 Generation
Alabama# 77612,052.47 GWh
Alaska# 48147527.57 GWh
Arizona# 918311,602.92 GWh
Arkansas# 211175,844.09 GWh
California# 41,76919,371.91 GWh
Colorado# 303044,433.17 GWh
Connecticut# 321683,779.74 GWh
Delaware# 4933419.31 GWh
District of Columbia# 511616.99 GWh
Florida# 232324,446.09 GWh
Georgia# 826611,628.97 GWh
Hawaii# 4773826.54 GWh
Idaho# 441481,495.33 GWh
Illinois# 538514,642.93 GWh
Indiana# 142138,730.35 GWh
Iowa# 262955,224.35 GWh
Kansas# 251895,250.86 GWh
Kentucky# 23605,806.86 GWh
Louisiana# 13879,343.34 GWh
Maine# 452171,135.36 GWh
Maryland# 392042,935.42 GWh
Massachusetts# 416521,746.92 GWh
Michigan# 1127910,468.02 GWh
Minnesota# 297694,717.95 GWh
Mississippi# 20586,625.37 GWh
Missouri# 221285,843.17 GWh
StateRankActive PlantsSep 2025 Generation
Montana# 40721,949.24 GWh
Nebraska# 341323,501.38 GWh
Nevada# 311144,053.88 GWh
New Hampshire# 42601,549.07 GWh
New Jersey# 273994,969.45 GWh
New Mexico# 361453,317.84 GWh
New York# 1296610,145.62 GWh
North Carolina# 1091711,211.15 GWh
North Dakota# 37603,089.17 GWh
Ohio# 620112,818.31 GWh
Oklahoma# 171437,364.05 GWh
Oregon# 282824,812.51 GWh
Pennsylvania# 326019,731.43 GWh
Rhode Island# 46100863.62 GWh
South Carolina# 162077,861.23 GWh
South Dakota# 43521,535.17 GWh
Tennessee# 19886,829.06 GWh
Texas# 194651,969.48 GWh
Utah# 351263,419.48 GWh
Vermont# 50120165.14 GWh
Virginia# 152418,580.52 GWh
Washington# 181387,120.43 GWh
West Virginia# 38393,057.29 GWh
Wisconsin# 242515,674.74 GWh
Wyoming# 33733,641.70 GWh