Directory of Power Plants in the United States

List of All United States Power Plants

Displaying Results 1 to 100 of 351
Plant NameUtilityLocationBalancing AuthorityAnnual GenerationPlant DateLast UpdateFuel Types
Okeelanta CogenerationNew Hope Power CompanySouth Bay, FLFlorida Power & Light Co. (FPL)53.7 GWhDec 1995May 2026 Agricultural By-Products : 97.4% Natural Gas : 2.6%
OrrvilleCity of Orrville - (OH)Orrville, OHPJM Interconnection, LLC (PJM)29.3 GWhDec 1948Dec 2025 Bituminous Coal : 54.3% Natural Gas : 45.7%
Osawatomie Power Plant South SubCity of Osawatomie - (KS)Osawatomie, KSSouthwest Power Pool (SWPP)3.0 MWhFeb 2017Dec 2025 Distillate Fuel Oil
OrrtannaOrrtanna Power, LLCOrrtanna, PAPJM Interconnection, LLC (PJM)417.0 MWhApr 1971Dec 2025 Distillate Fuel Oil
Oxford (KS)City of Oxford - (KS)Oxford, KSSouthwest Power Pool (SWPP)4.0 MWhJun 1999Dec 2025 Distillate Fuel Oil
Orrville PeakingAmerican Mun Power-Ohio, IncOrrville, OHPJM Interconnection, LLC (PJM)271.0 MWhJun 1999Dec 2025 Distillate Fuel Oil
Osawatomie Power Plant North SubCity of Osawatomie - (KS)Osawatomie, KSSouthwest Power Pool (SWPP)3.0 MWhApr 2018Dec 2025 Distillate Fuel Oil
Orange Street G1Town of Bedford - (VA)Bedford, VAPJM Interconnection, LLC (PJM)269.0 MWhJun 2005Dec 2025 Distillate Fuel Oil
Oak Bluffs Diesel Generating FacilityVineyard Reliability LLCOak Bluffs, MAISO New England (ISNE)2.9 GWhDec 1968Sep 2025 Distillate Fuel Oil
OgdenCity of Ogden - (IA)Ogden, IAMidcontinent Independent System Operator, Inc. (MISO)73.0 MWhJun 1951Dec 2025 Distillate Fuel Oil
OrcaCordova Electric Coop, IncCordova, AK4.3 GWhSep 1984Dec 2025 Distillate Fuel Oil
Old FaithfulNorthWestern Energy (MT wind/thermal)Yellowstone, WYNorthWestern Corporation (NWMT)203.0 MWhNov 1979Dec 2025 Distillate Fuel Oil
Onancock Diesel Generation FacilityOld Dominion Electric CoopOnancock, VAPJM Interconnection, LLC (PJM)578.0 MWhOct 2002Dec 2025 Distillate Fuel Oil
Oberlin (KS)City of Oberlin - (KS)Oberlin, KSSouthwest Power Pool (SWPP)9.8 MWhDec 1953Dec 2025 Distillate Fuel Oil
Overall Road StationCity of Farmington - (MO)Farmington, MOMidcontinent Independent System Operator, Inc. (MISO)29.0 MWhFeb 2003Dec 2025 Distillate Fuel Oil
OsborneCity of Osborne - (KS)Osborne, KSSouthwest Power Pool (SWPP)30.4 MWhMay 1957Dec 2025 Distillate Fuel Oil : 61.7% Natural Gas : 38.3%
OrdCity of Ord - (NE)Ord, NESouthwest Power Pool (SWPP)119.0 MWhDec 1962Dec 2025 Distillate Fuel Oil : 99.4% Natural Gas : 0.6%
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
Ormesa IOrmat Nevada IncHoltville, CAImperial Irrigation District (IID)70.2 GWhNov 1986Dec 2024 Geothermal
Ocean County LandfillNextEra Renewable Fuels, LLCManchester, NJPJM Interconnection, LLC (PJM)64.3 GWhJan 1997Dec 2024 Landfill Gas
Oak Ridge LFGTEWabash Valley Power Assn, IncLogansport, INMidcontinent Independent System Operator, Inc. (MISO)23.0 GWhNov 2003Dec 2025 Landfill Gas
Oak Grove Power ProducersCube District Energy, LLCArcadia, KSSouthwest Power Pool (SWPP)10.9 GWhFeb 2010Dec 2025 Landfill Gas
Omega Hills Gas RecoveryWM Renewable Energy LLCGermantown, WIMidcontinent Independent System Operator, Inc. (MISO)77.8 GWhNov 1985May 2026 Landfill Gas
Onslow Power ProducersCube District Energy, LLCJacksonville, NCDuke Energy Carolinas (DUK)11.2 GWhOct 2013Dec 2025 Landfill Gas
Oneida HerkimerWM Renewable Energy LLCBoonville, NYNew York Independent System Operator (NYIS)25.3 GWhMar 2012Dec 2024 Landfill Gas
Ontario LFGTESeneca Energy IIStanley, NYNew York Independent System Operator (NYIS)77.7 GWhOct 2003Dec 2025 Landfill Gas
Onalaska Campus Landfill BiogasGundersen Lutheran Biogas I LLCOnalaska, WIMidcontinent Independent System Operator, Inc. (MISO)3.7 GWhFeb 2012Dec 2025 Landfill Gas
Oak Grove (TX)Luminant Generation Company LLCFranklin, TXElectric Reliability Council of Texas, Inc. (ERCO)12.0 TWhMar 2010May 2026 Lignite Coal : 99.1% Natural Gas : 0.9%
OTHERCitizensHospitalTexas Microgrid, LLCVictoria, TXElectric Reliability Council of Texas, Inc. (ERCO)588.0 MWhMar 2020Dec 2025 Natural Gas
OuachitaEntergy Louisiana LLCSterlington, LAMidcontinent Independent System Operator, Inc. (MISO)4.4 TWhJul 2002May 2026 Natural Gas
Oneta Energy CenterOneta Power LLCBroken Arrow, OKSouthwest Power Pool (SWPP)4.4 TWhJun 2002May 2026 Natural Gas
One Market PlazaParamount Group IncSan Francisco, CACalifornia Independent System Operator (CISO)1.2 GWhNov 2003Dec 2025 Natural Gas
Ontelaunee Energy CenterOntelaunee Energy CenterReading, PAPJM Interconnection, LLC (PJM)3.7 TWhApr 2002May 2026 Natural Gas
Otter Creek Ethanol Poet - AshtonOtter Creek Ethanol LLC - Poet AshtonAshton, IAMidcontinent Independent System Operator, Inc. (MISO)44.6 GWhFeb 2004May 2026 Natural Gas
Oregon Clean Energy CenterOregon Clean Energy CenterOregon, OHPJM Interconnection, LLC (PJM)5.9 TWhJun 2017May 2026 Natural Gas
OTHERTraditionClearforkTexas Microgrid, LLCFort Worth, TXElectric Reliability Council of Texas, Inc. (ERCO)233.0 MWhMar 2023Dec 2025 Natural Gas
Oak Point CogenChevron Oronite Co LLCBelle Chasse, LAMidcontinent Independent System Operator, Inc. (MISO)97.8 GWhSep 1999Dec 2025 Natural Gas
Overlook Medical CenterAtlantic Health SystemSummit, NJPJM Interconnection, LLC (PJM)11.4 GWhDec 2011Dec 2025 Natural Gas
O H HutchingsKimura Power LLCMiamisburg, OHPJM Interconnection, LLC (PJM)397.0 MWhJun 1948Dec 2024 Natural Gas
Oxbow CreekOxbow Creek Energy LLCFactoryville, PAPJM Interconnection, LLC (PJM)40.6 GWhNov 2019Dec 2025 Natural Gas
OwatonnaCity of Owatonna - (MN)Owatonna, MNMidcontinent Independent System Operator, Inc. (MISO)1.4 GWhMar 1982Dec 2025 Natural Gas
Opryland USAGaylord Entertainment CoNashville, TNTennessee Valley Authority (TVA)8.0 GWhJun 1995May 2026 Natural Gas
Owatonna Energy StationSouthern Minnesota Mun P AgnyOwatonna, MNMidcontinent Independent System Operator, Inc. (MISO)2.3 GWhFeb 2018Dec 2025 Natural Gas
Oxnard Paper MillNew-Indy, Oxnard LLCOxnard, CACalifornia Independent System Operator (CISO)150.5 GWhFeb 1986May 2026 Natural Gas
One PatriotBloom EnergyFoxborough, MAISO New England (ISNE)16.9 GWhNov 2019Dec 2025 Natural Gas
O W SommersCity of San Antonio - (TX)San Antonio, TXElectric Reliability Council of Texas, Inc. (ERCO)2.3 TWhMar 1972Dec 2025 Natural Gas
OxnardProcter&Gamble Paper Products Co-OxnardOxnard, CACalifornia Independent System Operator (CISO)425.0 GWhJun 1982May 2026 Natural Gas
Otsego Mill Power PlantOtsego Paper IncOtsego, MIMidcontinent Independent System Operator, Inc. (MISO)162.5 GWhOct 1995Dec 2025 Natural Gas
Orange Grove Peaking FacilityOrange Grove Energy LPPala, CACalifornia Independent System Operator (CISO)9.1 GWhMay 2010Dec 2025 Natural Gas
OsawatomieEvergy MetroMiami, KSSouthwest Power Pool (SWPP)53.6 GWhMay 2003Dec 2025 Natural Gas
OcotilloArizona Public Service CoTempe, AZArizona Public Service Company (AZPS)378.7 GWhFeb 1960May 2026 Natural Gas
Odessa-Ector Power PlantLaFrontera Holdings LLCOdessa, TXElectric Reliability Council of Texas, Inc. (ERCO)8.5 TWhJun 2001May 2026 Natural Gas
Odyssey Energy Altura Cogen, LLCOdyssey Operating ServicesChannelview, TXElectric Reliability Council of Texas, Inc. (ERCO)3.4 TWhOct 1985May 2026 Natural Gas
Orange Cogeneration FacilityNorthern Star Generation Services Co LLCBartow, FLDuke Energy Florida, Inc. (FPC)374.6 GWhJan 1995Dec 2025 Natural Gas
Osprey Energy Center Power PlantDuke Energy Florida, LLCAuburndale, FLTampa Electric Company (TEC)3.4 TWhApr 2004May 2026 Natural Gas
Otay Mesa Generating ProjectOtay Mesa Energy Center LLCSan Diego, CACalifornia Independent System Operator (CISO)1.3 TWhSep 2009May 2026 Natural Gas
OTHERBenEKDallasGenerate ER-NG, LLCDallas, TXElectric Reliability Council of Texas, Inc. (ERCO)306.0 MWhApr 2023Dec 2025 Natural Gas
Oroville Cogeneration, LLCApex Power Generation Corp.Oroville, CACalifornia Independent System Operator (CISO)115.6 MWhDec 1989Dec 2025 Natural Gas
Ormond BeachOrmond Beach Power, LLCOxnard, CACalifornia Independent System Operator (CISO)4.9 GWhJul 1971May 2026 Natural Gas
Orlando Cogen LPFlorida Municipal Power Agency (FL)Orlando, FLDuke Energy Florida, Inc. (FPC)704.8 GWhAug 1993Dec 2024 Natural Gas
OTHERChildrensPlanoGenerate ER-NG, LLCPlano, TXElectric Reliability Council of Texas, Inc. (ERCO)112.0 MWhNov 2025Dec 2025 Natural Gas
Orbit Bloom Fuel CellDG Fuel Cell, LLCMedford, NYNew York Independent System Operator (NYIS)44.4 GWhJul 2020Dec 2025 Natural Gas
OTHERNFBWATexas Microgrid, LLCHouston, TXElectric Reliability Council of Texas, Inc. (ERCO)255.0 MWhJan 2021Dec 2025 Natural Gas
Oregon State University Energy CenterOregon State UniversityCorvallis, ORBonneville Power Administration (BPAT)35.6 GWhMay 2010May 2026 Natural Gas
OTHERTraditionBuffaloTexas Microgrid, LLCHouston, TXElectric Reliability Council of Texas, Inc. (ERCO)79.0 MWhMay 2024Dec 2025 Natural Gas
OTHERTexasA&MTexas Microgrid, LLCBryan, TXElectric Reliability Council of Texas, Inc. (ERCO)1.6 GWhApr 2018Dec 2025 Natural Gas
Oxford (NE)Village of Oxford - (NE)Oxford, NESouthwest Power Pool (SWPP)82.0 MWhJul 1953Dec 2025 Natural Gas : 67.3% Distillate Fuel Oil : 32.7%
Osceola Generating Station (FL)Orlando Utilities CommSt. Cloud, FLDuke Energy Florida, Inc. (FPC)3.7 GWhNov 2001Dec 2025 Natural Gas : 85.7% Distillate Fuel Oil : 14.3%
Oberlin (OH)City of Oberlin - (OH)Oberlin, OHPJM Interconnection, LLC (PJM)593.0 MWhDec 1947Dec 2025 Natural Gas : 87.7% Distillate Fuel Oil : 12.3%
Orchard ParkBorough of Chambersburg - (PA)Chambersburg, PAPJM Interconnection, LLC (PJM)49.0 GWhNov 2003May 2026 Natural Gas : 96.0% Distillate Fuel Oil : 4.0%
Ocean State PowerOcean State Power CoHarrisville, RIISO New England (ISNE)1.0 TWhNov 1990Dec 2025 Natural Gas : 99.7%
Oyster Creek Unit VIIIDow Chemical Company-Oyster Creek VIIIFreeport, TXElectric Reliability Council of Texas, Inc. (ERCO)2.6 TWhSep 1994May 2026 Natural Gas : 99.8%
Oleander Power Project LPOleander Holdings LLCCocoa, FLFlorida Power & Light Co. (FPL)579.6 GWhMay 2002Dec 2025 Natural Gas : 99.8%
Okeechobee Clean Energy CenterFlorida Power & Light CoOkeechobee, FLFlorida Power & Light Co. (FPL)10.8 TWhFeb 2019May 2026 Natural Gas : 99.9%
Ocean State Power IIOcean State Power IIHarrisville, RIISO New England (ISNE)576.9 GWhSep 1991Dec 2025 Natural Gas : 99.9%
Onondaga County Resource RecoveryCovanta Onondega LPJamesville, NYNew York Independent System Operator (NYIS)179.4 GWhOct 1994May 2026 Non-biogenic Municipal Solid Waste : 53.8% Biogenic Municipal Solid Waste : 44.0% Natural Gas : 2.2%
Olmsted Waste EnergyOlmsted County Public Works - (MN)Rochester, MNMidcontinent Independent System Operator, Inc. (MISO)47.5 GWhMar 1987Dec 2025 Non-biogenic Municipal Solid Waste : 54.7% Biogenic Municipal Solid Waste : 44.8% Natural Gas : 0.5%
Oswego County Energy RecoveryOswego County - (NY)Fulton, NYNew York Independent System Operator (NYIS)5.6 GWhJan 1986Dec 2025 Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
OconeeDuke Energy Carolinas, LLCSeneca, SCDuke Energy Carolinas (DUK)22.0 TWhJun 1973May 2026 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 PlantCity of Oxnard - (CA)Oxnard, CACalifornia Independent System Operator (CISO)3.0 GWhJul 1981May 2026 Other Biomass Gas : 97.6% Natural Gas : 2.4%
Oswego Harbor PowerOswego Harbor PowerOswego, NYNew York Independent System Operator (NYIS)130.8 GWhMay 1975Feb 2026 Residual Fuel Oil : 98.0% Natural Gas : 2.0%
OR -Solops - SPI 18 - CorkCork Solar, LLCMolalla, ORPortland General Electric Company (PGE)2.4 GWhNov 2024Dec 2025 Solar
OR - Solops - SPI 18 - BelvedereBelvedere Solar, LLCMount Angel, ORPortland General Electric Company (PGE)5.2 GWhNov 2024Dec 2025 Solar
OR Solar 2, LLCOR Solar 2, LLCEagle Point, ORPacifiCorp West (PACW)20.7 GWhSep 2020Dec 2025 Solar
Onyx - Saratoga Springs Landfill Solar COnyx Asset Services GroupSaratoga Springs, NYNew York Independent System Operator (NYIS)2.9 GWhOct 2017Dec 2025 Solar
OR - Solops - SPI 18 - ClayfieldClayfield Solar, LLCEstacada, ORPortland General Electric Company (PGE)3.2 GWhSep 2024Dec 2025 Solar
Onyx - Pembroke Landfill SolarOnyx Asset Services GroupPembroke, MAISO New England (ISNE)3.5 GWhNov 2017Dec 2025 Solar
Orange PVTerraform ArcadiaOrange, MAISO New England (ISNE)2.6 GWhJun 2013Dec 2025 Solar
O'Brien 1Generate CapitalHartford, NYNew York Independent System Operator (NYIS)769.0 MWhApr 2024Mar 2025 Solar
Onyx - Brockton Thatcher Landfill SolarOnyx Asset Services GroupBrockton, MAISO New England (ISNE)5.0 GWhOct 2017Dec 2025 Solar
OrchardFlorida Power & Light CoFt. Pierce, FLFlorida Power & Light Co. (FPL)162.9 GWhDec 2023May 2026 Solar
Orchard KnobOrchard Knob Solar LLCDallas, ORPacifiCorp West (PACW)993.0 MWhDec 2024Nov 2025 Solar
Onyx - Allen HarimOnyx Asset Services GroupHarbeson, DEPJM Interconnection, LLC (PJM)1.9 GWhMar 2017Dec 2024 Solar
Orchard Ranch SolarOrchard Ranch Solar, LLCKuna, IDIdaho Power Company (IPCO)46.3 GWhFeb 2017May 2026 Solar
Osage City SolarEvergy Kansas Central, IncOsage City, KSSouthwest Power Pool (SWPP)3.1 GWhNov 2024Dec 2025 Solar
OR - Chapman Creek - Greenkey CSGChapman Creek Solar, LLCCave Junction, ORPacifiCorp West (PACW)4.7 GWhApr 2025Dec 2025 Solar

Summary of Power Plants By State

Figures are based on May 2026 generation numbers.
StateRankActive PlantsMay 2026 Generation
Alabama# 87711,823.92 GWh
Alaska# 48140513.29 GWh
Arizona# 141969,091.99 GWh
Arkansas# 251174,873.33 GWh
California# 41,74015,360.54 GWh
Colorado# 313084,156.36 GWh
Connecticut# 351733,391.33 GWh
Delaware# 4935236.45 GWh
District of Columbia# 511714.46 GWh
Florida# 234225,093.89 GWh
Georgia# 625012,138.02 GWh
Hawaii# 4670762.50 GWh
Idaho# 411511,963.84 GWh
Illinois# 549414,816.74 GWh
Indiana# 152227,662.28 GWh
Iowa# 212975,720.38 GWh
Kansas# 241885,118.39 GWh
Kentucky# 23615,471.28 GWh
Louisiana# 13909,131.60 GWh
Maine# 442421,130.78 GWh
Maryland# 372283,103.37 GWh
Massachusetts# 456661,073.93 GWh
Michigan# 112769,774.25 GWh
Minnesota# 287904,567.82 GWh
Mississippi# 20606,404.61 GWh
Missouri# 221295,701.36 GWh
StateRankActive PlantsMay 2026 Generation
Montana# 40712,053.07 GWh
Nebraska# 361263,193.89 GWh
Nevada# 331173,848.29 GWh
New Hampshire# 43571,198.65 GWh
New Jersey# 303984,274.91 GWh
New Mexico# 291584,513.39 GWh
New York# 101,06410,643.78 GWh
North Carolina# 991311,481.42 GWh
North Dakota# 34593,601.34 GWh
Ohio# 721111,886.21 GWh
Oklahoma# 171447,547.66 GWh
Oregon# 272814,575.23 GWh
Pennsylvania# 325818,234.28 GWh
Rhode Island# 47107580.94 GWh
South Carolina# 162097,632.32 GWh
South Dakota# 42531,802.78 GWh
Tennessee# 19996,454.94 GWh
Texas# 11,01950,690.02 GWh
Utah# 391282,809.26 GWh
Vermont# 50118186.37 GWh
Virginia# 182507,445.56 GWh
Washington# 121349,231.20 GWh
West Virginia# 32414,142.41 GWh
Wisconsin# 262664,582.07 GWh
Wyoming# 38692,983.81 GWh