Directory of Power Plants in the United States
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Oconee | Duke Energy Carolinas, LLC | Seneca, SC | Duke Energy Carolinas (DUK) | 21.6 TWh | Jun 1973 | Feb 2025 | Nuclear |
| Okeechobee Clean Energy Center | Florida Power & Light Co | Okeechobee, FL | Florida Power & Light Co. (FPL) | 10.9 TWh | Feb 2019 | Feb 2025 | Natural Gas |
| Oak Grove (TX) | Luminant Generation Company LLC | Franklin, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 10.8 TWh | Mar 2010 | Feb 2025 | Lignite Coal : 97.6% Natural Gas : 2.4% |
| Odessa-Ector Power Plant | LaFrontera Holdings LLC | Odessa, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 7.6 TWh | Jun 2001 | Feb 2025 | Natural Gas |
| Oregon Clean Energy Center | Oregon Clean Energy Center | Oregon, OH | PJM Interconnection, LLC (PJM) | 6.3 TWh | Jun 2017 | Feb 2025 | Natural Gas |
| Oneta Energy Center | Oneta Power LLC | Broken Arrow, OK | Southwest Power Pool (SWPP) | 5.6 TWh | Jun 2002 | Feb 2025 | Natural Gas |
| Ouachita | Entergy Louisiana LLC | Sterlington, LA | Midcontinent Independent System Operator, Inc. (MISO) | 4.4 TWh | Jul 2002 | Feb 2025 | Natural Gas |
| Odyssey Energy Altura Cogen, LLC | Odyssey Operating Services | Channelview, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 3.6 TWh | Oct 1985 | Feb 2025 | Natural Gas |
| Ontelaunee Energy Center | Ontelaunee Energy Center | Reading, PA | PJM Interconnection, LLC (PJM) | 3.5 TWh | Apr 2002 | Feb 2025 | Natural Gas |
| Osprey Energy Center Power Plant | Duke Energy Florida, LLC | Auburndale, FL | Tampa Electric Company (TEC) | 3.5 TWh | Apr 2004 | Feb 2025 | Natural Gas |
| Oyster Creek Unit VIII | Dow Chemical Company-Oyster Creek VIII | Freeport, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 2.2 TWh | Sep 1994 | Feb 2025 | Natural Gas |
| Otay Mesa Generating Project | Otay Mesa Energy Center LLC | San Diego, CA | California Independent System Operator (CISO) | 2.1 TWh | Sep 2009 | Feb 2025 | Natural Gas |
| Oahe | USACE-Omaha | Pierre, SD | Southwest Power Pool (SWPP) | 2.1 TWh | Mar 1962 | Dec 2023 | Water |
| 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% |
| O W Sommers | City of San Antonio - (TX) | San Antonio, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 1.9 TWh | Mar 1972 | Dec 2023 | Natural Gas |
| Orient Wind Farm | MidAmerican Energy Co | Orient, IA | Midcontinent Independent System Operator, Inc. (MISO) | 1.9 TWh | Nov 2018 | Feb 2025 | Wind |
| Ocean State Power | Ocean State Power Co | Harrisville, RI | ISO New England (ISNE) | 1.3 TWh | Nov 1990 | Dec 2023 | Natural Gas : 99.6% |
| Ocean State Power II | Ocean State Power II | Harrisville, RI | ISO New England (ISNE) | 1.1 TWh | Sep 1991 | Dec 2023 | Natural Gas : 99.7% |
| Orlando Cogen LP | Orlando CoGen Ltd LP | Orlando, FL | Duke Energy Florida, Inc. (FPC) | 1.0 TWh | Aug 1993 | Dec 2023 | Natural Gas |
| Oxbow (OR) | Idaho Power Co | Oxbow, OR | Idaho Power Company (IPCO) | 900.1 GWh | Jun 1961 | Dec 2023 | Water |
| O'Brien Wind | MidAmerican Energy Co | Primghar, IA | Midcontinent Independent System Operator, Inc. (MISO) | 834.6 GWh | Aug 2016 | 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 |
| Osborn Wind Energy | Osborn Wind Energy LLC | Stewartsville, MO | Southwest Power Pool (SWPP) | 722.5 GWh | Nov 2016 | Feb 2025 | Wind |
| Oso Grande Wind Farm | Tucson Electric Power Co | Maljamar, NM | Tucson Electric Power (TEPC) | 674.2 GWh | Apr 2021 | Feb 2025 | Wind |
| Oberon II Solar Project | IP Oberon II, LLC | Desert Center, CA | California Independent System Operator (CISO) | 585.5 GWh | Aug 2023 | Feb 2025 | Solar |
| Old Trail Wind Farm | Old Trail Wind Farm LLC | Ellsworth, IL | PJM Interconnection, LLC (PJM) | 577.1 GWh | Nov 2007 | Feb 2025 | Wind |
| Oberon Solar Project | IP Oberon LLC | Desert Center, CA | California Independent System Operator (CISO) | 547.1 GWh | Aug 2023 | Feb 2025 | Solar |
| Old Settler Wind | Old Settler Wind, LLC | Floydada, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 532.6 GWh | Mar 2017 | Feb 2025 | Wind |
| Ocotillo Express LLC | Pattern Operators LP | Ocotillo, CA | California Independent System Operator (CISO) | 520.0 GWh | Nov 2012 | Feb 2025 | Wind |
| Origin Wind | Enel Green Power NA, Inc. | Hennepin, OK | Southwest Power Pool (SWPP) | 519.8 GWh | Oct 2014 | Dec 2023 | Wind |
| Osage Wind, LLC | Enel Green Power NA, Inc. | Burbank, OK | Associated Electric Cooperative, Inc. (AECI) | 511.9 GWh | May 2015 | Dec 2023 | Wind |
| Ocotillo | Arizona Public Service Co | Tempe, AZ | Arizona Public Service Company (AZPS) | 490.1 GWh | Feb 1960 | Feb 2025 | Natural Gas |
| Oxnard | Procter&Gamble Paper Products Co-Oxnard | Oxnard, CA | California Independent System Operator (CISO) | 486.5 GWh | Jun 1982 | Feb 2025 | Natural Gas |
| Otter Creek Wind Farm LLC | Avangrid Renewables LLC | Ransom, IL | PJM Interconnection, LLC (PJM) | 474.1 GWh | Feb 2020 | Feb 2025 | Wind |
| Oak Ridge Solar | AES Clean Energy | Oak Ridge, LA | Midcontinent Independent System Operator, Inc. (MISO) | 447.8 GWh | Nov 2023 | Feb 2025 | Solar |
| Oliver Wind III, LLC | Oliver Wind III, LLC | Mandan, ND | Midcontinent Independent System Operator, Inc. (MISO) | 436.3 GWh | Dec 2016 | Feb 2025 | Wind |
| Osceola Windpower LLC | Osceola Windpower LLC | Harris, IA | Southwest Power Pool (SWPP) | 416.8 GWh | Jun 2008 | Feb 2025 | Wind |
| Orange Cogeneration Facility | Northern Star Generation Services Co LLC | Bartow, FL | Duke Energy Florida, Inc. (FPC) | 391.0 GWh | Jan 1995 | Dec 2023 | Natural Gas |
| Oleander Power Project LP | Oleander Holdings LLC | Cocoa, FL | Florida Power & Light Co. (FPL) | 383.6 GWh | May 2002 | Dec 2023 | Natural Gas : 99.7% |
| Old Hickory | USCE-Nashville District | Hendersonville, TN | Tennessee Valley Authority (TVA) | 368.7 GWh | Mar 1957 | Dec 2023 | Water |
| Oxbow Solar 1 | Lightsource Renewable Energy Asset Management, LLC | New Roads, LA | Midcontinent Independent System Operator, Inc. (MISO) | 368.2 GWh | - | Feb 2025 | Solar |
| OE_ESCL | OE_ESCL | Grants, NM | Public Service Company of New Mexico (PNM) | 352.5 GWh | - | Feb 2025 | Solar |
| Oakfield Wind Project | Onward Energy | City of Oakfield, ME | ISO New England (ISNE) | 352.4 GWh | Sep 2015 | Feb 2025 | Wind |
| Orion III Solar Project | Ben Milam Solar 3 LLC | Buckholts, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 297.6 GWh | - | Feb 2025 | Solar |
| Old 300 Solar Center, LLC | Old 300 Solar Center, LLC | Needville, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 294.9 GWh | - | Feb 2025 | Solar |
| Oberon IA | Oberon Solar IA | Odessa, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 276.7 GWh | Jun 2020 | Feb 2025 | Solar |
| 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 |
| Ozark | USCE-Little Rock District | Ozark, AR | Southwestern Power Administration (SPA) | 253.1 GWh | Oct 1972 | Dec 2023 | Water |
| OCI Alamo 7 LLC | Consolidated Edison Development Inc. | Haskell, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 250.2 GWh | Jul 2016 | Dec 2023 | Solar |
| Orion I Solar Project | Ben Milam Solar 1 LLC | Burlington, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 243.4 GWh | - | Feb 2025 | Solar |
| OE_MS6 | OE_MS6 | St.Artesia, MS | Tennessee Valley Authority (TVA) | 239.1 GWh | - | Feb 2025 | Solar |
| Oak Trail Solar, LLC | Leeward Asset Management, LLC | Moyock, NC | PJM Interconnection, LLC (PJM) | 237.3 GWh | Jun 2023 | Feb 2025 | Solar |
| Osceola Windpower II | Osceola Windpower II | Harris, IA | Midcontinent Independent System Operator, Inc. (MISO) | 211.3 GWh | Aug 2008 | Feb 2025 | Wind |
| Onondaga County Resource Recovery | Covanta Onondega LP | Jamesville, NY | New York Independent System Operator (NYIS) | 209.7 GWh | Oct 1994 | Feb 2025 | Non-biogenic Municipal Solid Waste : 54.7% Biogenic Municipal Solid Waste : 44.7% Natural Gas : 0.6% |
| Oasis Wind | Terra-Gen Operating Co-Wind | Mojave, CA | California Independent System Operator (CISO) | 205.4 GWh | Nov 2004 | Dec 2023 | Wind |
| Onion River | Wisconsin Power & Light Co | Sheboygan Cedar Grove, WI | Midcontinent Independent System Operator, Inc. (MISO) | 204.3 GWh | Nov 2023 | Feb 2025 | Solar |
| Oak Solar | Oak Solar LLC | Gaston, NC | PJM Interconnection, LLC (PJM) | 203.1 GWh | Nov 2023 | Feb 2025 | Solar |
| OCI Alamo 5 LLC | Consolidated Edison Development Inc. | Uvalde, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 197.1 GWh | Nov 2015 | Dec 2023 | Solar |
| Oxnard Paper Mill | New-Indy, Oxnard LLC | Oxnard, CA | California Independent System Operator (CISO) | 192.8 GWh | Feb 1986 | Feb 2025 | Natural Gas |
| Oliver Wind IV | Oliver Wind IV, LLC | Hannover, ND | Southwest Power Pool (SWPP) | 190.4 GWh | - | Feb 2025 | Wind |
| Orion II Solar Project | Ben Milam Solar 2 LLC | Rosebud, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 179.1 GWh | - | Feb 2025 | Solar |
| Orchard | Florida Power & Light Co | Ft. Pierce, FL | Florida Power & Light Co. (FPL) | 177.2 GWh | - | Feb 2025 | Solar |
| Osage Dam | Union Electric Co - (MO) | Eldon, MO | Midcontinent Independent System Operator, Inc. (MISO) | 176.1 GWh | Sep 1931 | Dec 2023 | Water |
| OETN1 | OE_TN1 | Obion, TN | Tennessee Valley Authority (TVA) | 175.0 GWh | Feb 2023 | Feb 2025 | Solar |
| Otsego Mill Power Plant | Otsego Paper Inc | Otsego, MI | Midcontinent Independent System Operator, Inc. (MISO) | 161.2 GWh | Oct 1995 | Dec 2023 | Natural Gas |
| Oklahoma Wind Energy Center | FPL Energy Oklahoma Wind LLC | Woodward, OK | Southwest Power Pool (SWPP) | 153.0 GWh | Sep 2003 | Dec 2023 | Wind |
| Oak Grove | Portland General Electric Co | Estacada, OR | Portland General Electric Company (PGE) | 152.1 GWh | Jul 1924 | Dec 2023 | Water |
| Okeechobee Solar | Florida Power & Light Co | Vero Beach, FL | Florida Power & Light Co. (FPL) | 149.4 GWh | Mar 2020 | Feb 2025 | 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 |
| OREG 1 Inc | Ormat Nevada Inc | Culbertson, MT | Southwest Power Pool (SWPP) | 146.0 GWh | Jun 2006 | Feb 2025 | Waste Heat |
| OE_ALD | OE_ALD | Wing, AL | Southern Company Services, Inc. - Trans (SOCO) | 145.8 GWh | Mar 2023 | Feb 2025 | Solar |
| Ocoee 3 | Tennessee Valley Authority | Benton, TN | Tennessee Valley Authority (TVA) | 141.4 GWh | Mar 1943 | Dec 2023 | Water |
| OU Spirit Wind Farm | Oklahoma Gas & Electric Co | Woodward, OK | Southwest Power Pool (SWPP) | 141.4 GWh | Nov 2009 | Dec 2023 | Wind |
| Oliver Dam | Georgia Power Co | Columbus, GA | Southern Company Services, Inc. - Trans (SOCO) | 134.4 GWh | Jun 1959 | Dec 2023 | Water |
| OE_GA3 | Onward Energy | Camilla, GA | Southern Company Services, Inc. - Trans (SOCO) | 119.3 GWh | Nov 2019 | Feb 2025 | Solar |
| Ocotillo Wells | Conductive Power | Borrego Springs, CA | California Independent System Operator (CISO) | 112.1 GWh | Aug 2023 | Feb 2025 | Solar |
| OREG 2 Inc | Ormat Nevada Inc | Culbertson, MT | Southwest Power Pool (SWPP) | 110.3 GWh | Nov 2008 | Feb 2025 | Waste Heat |
| 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 |
| Ormesa I | Ormat Nevada Inc | Holtville, CA | Imperial Irrigation District (IID) | 101.7 GWh | Nov 1986 | Dec 2023 | Geothermal |
| 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 |
| Ormesa II | Ormat Nevada Inc | Holtville, CA | Imperial Irrigation District (IID) | 95.0 GWh | Apr 1989 | Dec 2023 | Geothermal |
| Oak Point Cogen | Chevron Oronite Co LLC | Belle Chasse, LA | Midcontinent Independent System Operator, Inc. (MISO) | 92.8 GWh | Sep 1999 | Dec 2023 | Natural Gas |
| OCI Alamo Solar I Hybrid | OCI Solar Power | San Antonio, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 88.3 GWh | Nov 2013 | Dec 2023 | Solar |
| OE_AZ1 | Onward Energy | Salome, AZ | Western Area Power Administration - Desert Southwest Region (WALC) | 87.9 GWh | Nov 2019 | Feb 2025 | Solar |
| Oxford Dam | Duke Energy Carolinas, LLC | Conover, NC | Duke Energy Carolinas (DUK) | 87.3 GWh | Mar 1928 | Dec 2023 | Water |
| Otter Creek Solar | Dominion Energy Inc. | Chase City, VA | PJM Interconnection, LLC (PJM) | 83.1 GWh | Sep 2023 | Feb 2025 | Solar |
| Omega Hills Gas Recovery | WM Renewable Energy LLC | Germantown, WI | Midcontinent Independent System Operator, Inc. (MISO) | 82.2 GWh | Nov 1985 | Feb 2025 | Landfill Gas |
| Ocoee 2 | Tennessee Valley Authority | Benton, TN | Tennessee Valley Authority (TVA) | 80.7 GWh | Sep 1913 | Dec 2023 | Water |
| OCI Alamo 4, LLC | Consolidated Edison Development Inc. | Brackettville, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 78.9 GWh | Jul 2014 | Dec 2023 | Solar |
| Ontario LFGTE | Seneca Energy II | Stanley, NY | New York Independent System Operator (NYIS) | 78.4 GWh | Oct 2003 | Dec 2023 | Landfill Gas |
| Ocoee 1 | Tennessee Valley Authority | Benton, TN | Tennessee Valley Authority (TVA) | 69.8 GWh | Dec 1911 | Dec 2023 | Water |
| Ormesa III | Ormat Nevada Inc | Holtville, CA | Imperial Irrigation District (IID) | 68.5 GWh | Apr 1989 | Dec 2023 | Geothermal |
| Oak Tree Energy | Consolidated Edison Development Inc. | Clark, SD | Southwest Power Pool (SWPP) | 66.7 GWh | Nov 2014 | Dec 2023 | Wind |
| Ocean County Landfill | EPP Renewable Energy | Manchester, NJ | PJM Interconnection, LLC (PJM) | 64.3 GWh | Jan 1997 | Dec 2024 | Landfill Gas |
| Oxbow Creek | Oxbow Creek Energy LLC | Factoryville, PA | PJM Interconnection, LLC (PJM) | 62.4 GWh | Nov 2019 | Dec 2023 | Natural Gas |
| Ozark Beach | Empire District Electric Co | Forsyth, MO | Southwest Power Pool (SWPP) | 55.7 GWh | May 1931 | Dec 2023 | Water |
| Oberon IB | Oberon Solar IB | Odessa, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 55.7 GWh | Jun 2020 | Feb 2025 | Solar |
| Owatonna Energy Station | Southern Minnesota Mun P Agny | Owatonna, MN | Midcontinent Independent System Operator, Inc. (MISO) | 53.5 GWh | Feb 2018 | Dec 2023 | Natural Gas |
| Oswego Harbor Power | Oswego Harbor Power | Oswego, NY | New York Independent System Operator (NYIS) | 52.3 GWh | May 1975 | Jan 2025 | Residual Fuel Oil |
| Oregon State University Energy Center | Oregon State University | Corvallis, OR | Bonneville Power Administration (BPAT) | 47.7 GWh | May 2010 | Feb 2025 | Natural Gas |
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 |