Directory of Power Plants in the United States
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Orca | Cordova Electric Coop, Inc | Cordova, AK | 4.3 GWh | Sep 1984 | Dec 2025 | Distillate Fuel Oil | |
| Ocotillo | Arizona Public Service Co | Tempe, AZ | Arizona Public Service Company (AZPS) | 370.6 GWh | Feb 1960 | Jun 2026 | Natural Gas |
| Osage Wind, LLC | Enel Green Power NA, Inc. | Burbank, OK | Associated Electric Cooperative, Inc. (AECI) | 480.3 GWh | May 2015 | Dec 2025 | Wind |
| Outback Solar At Christmas Valley | Outback Solar, LLC | Christmas Valley, OR | Bonneville Power Administration (BPAT) | 8.8 GWh | Sep 2012 | Dec 2025 | Solar |
| Orchard Windfarm 2, LLC | Orchard Windfarm, LLC | Lexington, OR | Bonneville Power Administration (BPAT) | 18.6 GWh | Nov 2020 | Dec 2025 | Wind |
| Orchard Windfarm 3, LLC | Orchard Windfarm, LLC | Lexington, OR | Bonneville Power Administration (BPAT) | 17.0 GWh | Nov 2020 | Dec 2025 | Wind |
| Oregon State University Energy Center | Oregon State University | Corvallis, OR | Bonneville Power Administration (BPAT) | 33.7 GWh | May 2010 | Jun 2026 | Natural Gas |
| Ostrea Solar, LLC | Cypress Creek Renewables | Moxee, WA | Bonneville Power Administration (BPAT) | 21.5 GWh | - | Jun 2026 | Solar |
| Oro Loma | RWE Clean Energy | Oro Loma, CA | California Independent System Operator (CISO) | 49.2 GWh | Dec 2016 | Dec 2025 | Solar |
| Ocotillo Wells | Conductive Power | Borrego Springs, CA | California Independent System Operator (CISO) | 104.8 GWh | Aug 2023 | Jun 2026 | Solar |
| Oroville Cogeneration, LLC | Apex Power Generation Corp. | Oroville, CA | California Independent System Operator (CISO) | 115.6 MWh | Dec 1989 | Dec 2025 | Natural Gas |
| One Ten Partners PV | One Ten Partners, LLC | Palmdale, CA | California Independent System Operator (CISO) | 5.5 GWh | Aug 2017 | Dec 2025 | Solar |
| One Market Plaza | Paramount Group Inc | San Francisco, CA | California Independent System Operator (CISO) | 1.2 GWh | Nov 2003 | Dec 2025 | Natural Gas |
| Oxbow (CA) | Placer County Water Agency - (CA) | Foresthill, CA | California Independent System Operator (CISO) | 23.2 GWh | Sep 1966 | Dec 2025 | Water |
| Oltmans SCE at Jurupa | California PV Energy LLC | Ontario, CA | California Independent System Operator (CISO) | 2.4 GWh | Nov 2013 | Dec 2025 | Solar |
| Oltmans SCE at Champagne | California PV Energy LLC | Ontario, CA | California Independent System Operator (CISO) | 1.6 GWh | Nov 2013 | Dec 2025 | Solar |
| Olsen | Olsen Power Partners | Whitmore, CA | California Independent System Operator (CISO) | 15.3 GWh | Dec 1989 | Dec 2025 | Water |
| OES Biogas Power | Organic Energy Solutions, Inc. | San Bernardino, CA | California Independent System Operator (CISO) | 4.9 GWh | - | Dec 2024 | Other Biomass Gas |
| Oberon Solar Project | Intersect USA, LLC | Desert Center, CA | California Independent System Operator (CISO) | 569.1 GWh | Aug 2023 | Jun 2026 | Solar |
| Oberon II Solar Project | Intersect USA, LLC | Desert Center, CA | California Independent System Operator (CISO) | 575.8 GWh | Aug 2023 | Jun 2026 | Solar |
| OK Produce Fresno Carport | OK Produce | Fresno, CA | California Independent System Operator (CISO) | 3.3 GWh | Dec 2018 | Dec 2025 | Solar |
| Oasis Wind | Terra-Gen Operating Co-Wind | Mojave, CA | California Independent System Operator (CISO) | 221.1 GWh | Nov 2004 | Dec 2025 | Wind |
| Oasis Alta | Terra-Gen Operating Co-Wind | Mojave, CA | California Independent System Operator (CISO) | 49.3 GWh | Mar 2021 | Dec 2025 | Wind |
| Oakley Solar Project | Oakley Solar Project LLC | Oakley, CA | California Independent System Operator (CISO) | 2.1 GWh | May 2013 | Dec 2025 | Solar |
| Oaks HOA | Onyx Asset Services Group | Ione, CA | California Independent System Operator (CISO) | 1.7 GWh | Mar 2025 | 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 | Jun 2026 | Natural Gas |
| 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 |
| Ocotillo Express LLC | Pattern Operators LP | Ocotillo, CA | California Independent System Operator (CISO) | 402.1 GWh | Nov 2012 | Jun 2026 | Wind |
| Oxnard | Procter&Gamble Paper Products Co-Oxnard | Oxnard, CA | California Independent System Operator (CISO) | 426.0 GWh | Jun 1982 | Jun 2026 | Natural Gas |
| Oxnard Paper Mill | New-Indy, Oxnard LLC | Oxnard, CA | California Independent System Operator (CISO) | 165.5 GWh | Feb 1986 | Jun 2026 | Natural Gas |
| Oxnard Wastewater Treatment Plant | City of Oxnard - (CA) | Oxnard, CA | California Independent System Operator (CISO) | 2.7 GWh | Jul 1981 | Jun 2026 | Other Biomass Gas : 99.4% Natural Gas : 0.6% |
| Orion Solar II | Orion Solar II, LLC | Arvin, CA | California Independent System Operator (CISO) | 16.0 GWh | May 2014 | Dec 2025 | Solar |
| Orion Solar I | Orion Solar I LLC | Arvin, CA | California Independent System Operator (CISO) | 27.4 GWh | Mar 2014 | Dec 2025 | Solar |
| Ormond Beach | Ormond Beach Power, LLC | Oxnard, CA | California Independent System Operator (CISO) | 4.9 GWh | Jul 1971 | May 2026 | Natural Gas |
| 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 |
| Orange Grove Peaking Facility | Orange Grove Energy LP | Pala, CA | California Independent System Operator (CISO) | 9.1 GWh | May 2010 | Dec 2025 | Natural Gas |
| Otoe Solar Power Generation Station 1 LL | AES Distributed Energy | Apple Valley, CA | California Independent System Operator (CISO) | 3.5 GWh | Nov 2013 | Dec 2025 | Solar |
| Open Sky Dairy | Renewable Solar, Inc | Riverdale, CA | California Independent System Operator (CISO) | 418.8 MWh | Jun 2024 | Dec 2025 | Solar |
| Open Sky Ranch Inc | Bravo REC Management LLC | Riverdale, CA | California Independent System Operator (CISO) | 4.0 GWh | Jun 2024 | 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 |
| Odyssey Solar | SunStrong Management | Pelion, SC | Dominion Energy South Carolina, Inc. (SCEG) | 13.3 GWh | Jul 2017 | Dec 2025 | Solar |
| Old Caroleen Solar Farm | Cypress Creek Renewables | Forest City, NC | Duke Energy Carolinas (DUK) | 2.6 GWh | Jun 2018 | Dec 2025 | Solar |
| Ouchchy PV1 | Strata Manager, LLC | Mebane, NC | Duke Energy Carolinas (DUK) | 5.2 GWh | Nov 2015 | Dec 2025 | Solar |
| Orbit Energy Charlotte | Anaergia | Charlotte, NC | Duke Energy Carolinas (DUK) | 199.9 MWh | Oct 2016 | Dec 2024 | Other Biomass Gas |
| Overhill Solar | Strata Manager, LLC | Clinton, NC | Duke Energy Carolinas (DUK) | 10.1 GWh | Feb 2022 | Dec 2025 | Solar |
| Oakwood Solar | SunStrong Management | Mebane, NC | Duke Energy Carolinas (DUK) | 9.8 GWh | May 2021 | Dec 2025 | Solar |
| Old Catawba PV 1 | Strata Manager, LLC | Claremont, NC | Duke Energy Carolinas (DUK) | 5.5 GWh | Nov 2015 | Dec 2025 | Solar |
| Oakboro Farm | Headwater Energy, LLC | Laurinburg, NC | Duke Energy Carolinas (DUK) | 6.9 GWh | Aug 2014 | Dec 2025 | Solar |
| Organ Church Solar | MN8 Energy LLC | Rockwell, NC | Duke Energy Carolinas (DUK) | 10.1 GWh | Jan 2019 | Dec 2025 | Solar |
| Old Pageland Monroe Road Solar Farm | Cypress Creek Renewables | Monroe, NC | Duke Energy Carolinas (DUK) | 8.9 GWh | Oct 2015 | Dec 2025 | Solar |
| Owen Solar | Owen Solar LLC | Lincolnton, NC | Duke Energy Carolinas (DUK) | 6.9 GWh | Mar 2016 | Dec 2025 | Solar |
| Otis Elevator Company Solar | Otis Elevator Company | Florence, SC | Duke Energy Carolinas (DUK) | 1.7 GWh | Apr 2018 | Dec 2025 | Solar |
| Oconee | Duke Energy Carolinas, LLC | Seneca, SC | Duke Energy Carolinas (DUK) | 22.0 TWh | Jun 1973 | Jun 2026 | Nuclear |
| Onslow Power Producers | Cube District Energy, LLC | Jacksonville, NC | Duke Energy Carolinas (DUK) | 11.2 GWh | Oct 2013 | Dec 2025 | Landfill Gas |
| Oxford Dam | Duke Energy Carolinas, LLC | Conover, NC | Duke Energy Carolinas (DUK) | 86.5 GWh | Mar 1928 | Dec 2025 | Water |
| Osceola Solar Facility | Duke Energy Florida, LLC | Kenansville, FL | Duke Energy Florida, Inc. (FPC) | 4.6 GWh | Feb 2016 | Dec 2025 | Solar |
| Orange Cogeneration Facility | Northern Star Generation Services Co LLC | Bartow, FL | Duke Energy Florida, Inc. (FPC) | 374.6 GWh | Jan 1995 | Dec 2025 | Natural Gas |
| Orlando Cogen LP | Florida Municipal Power Agency (FL) | Orlando, FL | Duke Energy Florida, Inc. (FPC) | 704.8 GWh | Aug 1993 | Dec 2024 | Natural Gas |
| Osceola Generating Station (FL) | Orlando Utilities Comm | St. Cloud, FL | Duke Energy Florida, Inc. (FPC) | 3.7 GWh | Nov 2001 | Dec 2025 | Natural Gas : 85.7% Distillate Fuel Oil : 14.3% |
| Old Cedar Solar Energy Storage | North Carolina El Member Corp | Asheboro, NC | Duke Energy Progress East (CPLE) | 1.7 GWh | Jul 2021 | Dec 2025 | Solar : 99.8% |
| 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 |
| Ogburn Solar, LLC | Ogburn Solar, LLC | Jefferson, SC | Duke Energy Progress East (CPLE) | 4.3 GWh | Nov 2022 | Dec 2025 | Solar |
| Oberon IB | Oberon Solar IB | Odessa, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 46.1 GWh | Jun 2020 | Jun 2026 | Solar |
| Oak Grove (TX) | Luminant Generation Company LLC | Franklin, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 11.8 TWh | Mar 2010 | Jun 2026 | Lignite Coal : 99.2% Natural Gas : 0.8% |
| 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 |
| Oak Hill - Dry Creek | Vistra Zero LLC | Henderson, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 144.4 GWh | - | Jun 2026 | Solar |
| OCI Alamo 2, LLC | OCI Energy LLC | Converse, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 8.2 GWh | Feb 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 |
| O W Sommers | City of San Antonio - (TX) | San Antonio, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 2.3 TWh | Mar 1972 | Dec 2025 | Natural Gas |
| OCI Alamo Solar I Hybrid | OCI Energy LLC | San Antonio, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 77.8 GWh | Nov 2013 | Dec 2025 | Solar |
| Orange Grove | Orange Grove | Jim Wells, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 298.1 GWh | May 2025 | Jun 2026 | Solar |
| 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 |
| Oberon IA | Oberon Solar IA | Odessa, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 254.1 GWh | Jun 2020 | Jun 2026 | Solar |
| Orion II Solar Project | Ben Milam Solar 2 LLC | Rosebud, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 540.2 GWh | Aug 2024 | Jun 2026 | Solar |
| Old Settler Wind | Old Settler Wind, LLC | Floydada, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 571.1 GWh | Mar 2017 | Jun 2026 | Wind |
| Old 300 Solar Center, LLC | Old 300 Solar Center, LLC | Needville, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 882.5 GWh | Sep 2024 | Jun 2026 | Solar |
| OTHERBenEKDallas | Generate ER-NG, LLC | Dallas, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 306.0 MWh | Apr 2023 | Dec 2025 | Natural Gas |
| OTHERChildrensPlano | Generate ER-NG, LLC | Plano, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 112.0 MWh | Nov 2025 | 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 |
| Ocotillo Windpower | Deriva Energy | Forsan, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 79.4 GWh | Aug 2008 | Dec 2025 | Wind |
| OTHERNFBWA | Texas Microgrid, LLC | Houston, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 255.0 MWh | Jan 2021 | Dec 2025 | Natural Gas |
| Orion III Solar Project | Ben Milam Solar 3 LLC | Buckholts, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 524.7 GWh | Jul 2024 | Jun 2026 | Solar |
| Orion I Solar Project | Ben Milam Solar 1 LLC | Burlington, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 432.9 GWh | Jul 2024 | Jun 2026 | Solar |
| OTHERTexasA&M | Texas Microgrid, LLC | Bryan, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 1.6 GWh | Apr 2018 | Dec 2025 | Natural Gas |
| Oriana Solar LLC | Oriana Solar LLC | Victoria, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 315.7 GWh | Jul 2025 | Jun 2026 | Solar |
| Oyster Creek Unit VIII | Dow Chemical Company-Oyster Creek VIII | Freeport, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 2.6 TWh | Sep 1994 | Jun 2026 | Natural Gas : 99.8% |
| OTHERTraditionBuffalo | Texas Microgrid, LLC | Houston, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 79.0 MWh | May 2024 | Dec 2025 | Natural Gas |
| OTHERTraditionClearfork | Texas Microgrid, LLC | Fort Worth, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 233.0 MWh | Mar 2023 | Dec 2025 | Natural Gas |
| Odyssey Energy Altura Cogen, LLC | Odyssey Operating Services | Channelview, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 3.4 TWh | Oct 1985 | Jun 2026 | Natural Gas |
| Odessa-Ector Power Plant | LaFrontera Holdings LLC | Odessa, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 8.4 TWh | Jun 2001 | Jun 2026 | Natural Gas |
| Okeechobee Clean Energy Center | Florida Power & Light Co | Okeechobee, FL | Florida Power & Light Co. (FPL) | 11.0 TWh | Feb 2019 | Jun 2026 | Natural Gas : 99.9% |
| Okeechobee Solar | Florida Power & Light Co | Vero Beach, FL | Florida Power & Light Co. (FPL) | 145.3 GWh | Mar 2020 | Jun 2026 | Solar |
| Okeelanta Cogeneration | New Hope Power Company | South Bay, FL | Florida Power & Light Co. (FPL) | 53.2 GWh | Dec 1995 | Jun 2026 | Agricultural By-Products : 97.4% Natural Gas : 2.6% |
| Orange Blossom Solar Center | Florida Power & Light Co | Vero Beach, FL | Florida Power & Light Co. (FPL) | 150.2 GWh | Apr 2021 | Jun 2026 | Solar |
| Orchard | Florida Power & Light Co | Ft. Pierce, FL | Florida Power & Light Co. (FPL) | 165.3 GWh | Dec 2023 | Jun 2026 | Solar |
| Oleander Power Project LP | Oleander Holdings LLC | Cocoa, FL | Florida Power & Light Co. (FPL) | 579.6 GWh | May 2002 | Dec 2025 | Natural Gas : 99.8% |
| Oxbow (OR) | Idaho Power Co | Oxbow, OR | Idaho Power Company (IPCO) | 990.3 GWh | Jun 1961 | Dec 2025 | Water |
Summary of Power Plants By State
Figures are based on June 2026 generation numbers.| State | Rank | Active Plants | Jun 2026 Generation |
|---|---|---|---|
| Alabama | # 9 | 77 | 12,594.28 GWh |
| Alaska | # 48 | 140 | 563.53 GWh |
| Arizona | # 11 | 199 | 11,138.97 GWh |
| Arkansas | # 21 | 117 | 6,425.86 GWh |
| California | # 4 | 1,744 | 17,197.11 GWh |
| Colorado | # 29 | 309 | 4,933.21 GWh |
| Connecticut | # 34 | 173 | 3,737.86 GWh |
| Delaware | # 49 | 35 | 376.53 GWh |
| District of Columbia | # 51 | 17 | 18.29 GWh |
| Florida | # 2 | 342 | 26,309.59 GWh |
| Georgia | # 7 | 250 | 13,880.75 GWh |
| Hawaii | # 47 | 70 | 767.91 GWh |
| Idaho | # 41 | 152 | 2,099.32 GWh |
| Illinois | # 5 | 494 | 16,673.62 GWh |
| Indiana | # 18 | 222 | 8,401.10 GWh |
| Iowa | # 23 | 297 | 6,139.01 GWh |
| Kansas | # 25 | 188 | 5,758.25 GWh |
| Kentucky | # 22 | 61 | 6,181.49 GWh |
| Louisiana | # 15 | 90 | 9,779.36 GWh |
| Maine | # 45 | 242 | 1,215.46 GWh |
| Maryland | # 36 | 228 | 3,591.08 GWh |
| Massachusetts | # 44 | 666 | 1,410.23 GWh |
| Michigan | # 14 | 276 | 9,804.74 GWh |
| Minnesota | # 30 | 790 | 4,889.70 GWh |
| Mississippi | # 20 | 60 | 6,899.16 GWh |
| Missouri | # 24 | 129 | 6,066.44 GWh |
| State | Rank | Active Plants | Jun 2026 Generation |
|---|---|---|---|
| Montana | # 40 | 71 | 2,225.73 GWh |
| Nebraska | # 39 | 126 | 3,184.64 GWh |
| Nevada | # 31 | 117 | 4,654.59 GWh |
| New Hampshire | # 43 | 57 | 1,659.52 GWh |
| New Jersey | # 28 | 398 | 5,055.63 GWh |
| New Mexico | # 33 | 159 | 4,408.01 GWh |
| New York | # 10 | 1,064 | 11,564.60 GWh |
| North Carolina | # 8 | 913 | 12,773.20 GWh |
| North Dakota | # 35 | 59 | 3,713.80 GWh |
| Ohio | # 6 | 213 | 13,969.06 GWh |
| Oklahoma | # 17 | 144 | 9,156.03 GWh |
| Oregon | # 27 | 281 | 5,322.08 GWh |
| Pennsylvania | # 3 | 259 | 21,018.65 GWh |
| Rhode Island | # 46 | 107 | 854.92 GWh |
| South Carolina | # 16 | 209 | 9,442.42 GWh |
| South Dakota | # 42 | 53 | 1,803.66 GWh |
| Tennessee | # 19 | 99 | 7,036.17 GWh |
| Texas | # 1 | 1,028 | 57,844.67 GWh |
| Utah | # 38 | 129 | 3,196.09 GWh |
| Vermont | # 50 | 118 | 180.62 GWh |
| Virginia | # 12 | 250 | 10,352.13 GWh |
| Washington | # 13 | 135 | 10,051.77 GWh |
| West Virginia | # 32 | 41 | 4,489.44 GWh |
| Wisconsin | # 26 | 266 | 5,542.48 GWh |
| Wyoming | # 37 | 69 | 3,318.53 GWh |