Directory of Power Plants in the United States
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Osmond 1 | Northeast Power | Osmond, NE | Southwest Power Pool (SWPP) | 2.0 MWh | Nov 2023 | Dec 2025 | Distillate Fuel Oil |
| Osawatomie Power Plant North Sub | City of Osawatomie - (KS) | Osawatomie, KS | Southwest Power Pool (SWPP) | 3.0 MWh | Apr 2018 | Dec 2025 | Distillate Fuel Oil |
| Osawatomie Power Plant South Sub | City of Osawatomie - (KS) | Osawatomie, KS | Southwest Power Pool (SWPP) | 3.0 MWh | Feb 2017 | Dec 2025 | Distillate Fuel Oil |
| Oxford (KS) | City of Oxford - (KS) | Oxford, KS | Southwest Power Pool (SWPP) | 4.0 MWh | Jun 1999 | Dec 2025 | Distillate Fuel Oil |
| Oberlin (KS) | City of Oberlin - (KS) | Oberlin, KS | Southwest Power Pool (SWPP) | 9.8 MWh | Dec 1953 | Dec 2025 | Distillate Fuel Oil |
| Oak Leaf Solar XVI Community Solar | Navisun LLC | Pittsfield, MA | ISO New England (ISNE) | 10.0 MWh | Nov 2025 | Dec 2025 | Solar |
| Overall Road Station | City of Farmington - (MO) | Farmington, MO | Midcontinent Independent System Operator, Inc. (MISO) | 29.0 MWh | Feb 2003 | Dec 2025 | Distillate Fuel Oil |
| Osborne | City of Osborne - (KS) | Osborne, KS | Southwest Power Pool (SWPP) | 30.4 MWh | May 1957 | Dec 2025 | Distillate Fuel Oil : 61.7% Natural Gas : 38.3% |
| Oak Leaf Solar XVII Community Solar | Navisun LLC | Pittsfield, MA | ISO New England (ISNE) | 47.0 MWh | Nov 2025 | Dec 2025 | Solar |
| Ogden | City of Ogden - (IA) | Ogden, IA | Midcontinent Independent System Operator, Inc. (MISO) | 73.0 MWh | Jun 1951 | Dec 2025 | Distillate Fuel Oil |
| OTHERTraditionBuffalo | Texas Microgrid, LLC | Houston, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 79.0 MWh | May 2024 | Dec 2025 | Natural Gas |
| 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% |
| Oak Orchard | Generate Capital | Batavia, NY | New York Independent System Operator (NYIS) | 112.0 MWh | Nov 2025 | Dec 2025 | Solar |
| OTHERChildrensPlano | Generate ER-NG, LLC | Plano, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 112.0 MWh | Nov 2025 | Dec 2025 | Natural Gas |
| Oroville Cogeneration, LLC | Apex Power Generation Corp. | Oroville, CA | California Independent System Operator (CISO) | 115.6 MWh | Dec 1989 | Dec 2025 | Natural Gas |
| Oak Leaf Solar XXI (CSG) | Greenbacker Renewable Energy Corporation | Watkins, CO | Public Service Company of Colorado (PSCO) | 118.0 MWh | Nov 2018 | Dec 2025 | Solar |
| Ord | City of Ord - (NE) | Ord, NE | Southwest Power Pool (SWPP) | 119.0 MWh | Dec 1962 | Dec 2025 | Distillate Fuel Oil : 99.4% Natural Gas : 0.6% |
| Orbit Energy RI | Anaergia | Johnston, RI | ISO New England (ISNE) | 144.0 MWh | Jun 2017 | Dec 2024 | Other Biomass Gas |
| Orbit Energy Charlotte | Anaergia | Charlotte, NC | Duke Energy Carolinas (DUK) | 199.9 MWh | Oct 2016 | Dec 2024 | Other Biomass Gas |
| Old Faithful | NorthWestern Energy (MT wind/thermal) | Yellowstone, WY | NorthWestern Corporation (NWMT) | 203.0 MWh | Nov 1979 | Dec 2025 | Distillate Fuel Oil |
| OTHERTraditionClearfork | Texas Microgrid, LLC | Fort Worth, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 233.0 MWh | Mar 2023 | 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 |
| Orange Street G1 | Town of Bedford - (VA) | Bedford, VA | PJM Interconnection, LLC (PJM) | 269.0 MWh | Jun 2005 | Dec 2025 | Distillate Fuel Oil |
| Orrville Peaking | American Mun Power-Ohio, Inc | Orrville, OH | PJM Interconnection, LLC (PJM) | 271.0 MWh | Jun 1999 | Dec 2025 | Distillate Fuel Oil |
| OTHERBenEKDallas | Generate ER-NG, LLC | Dallas, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 306.0 MWh | Apr 2023 | Dec 2025 | Natural Gas |
| Orrtanna | Orrtanna Power, LLC | Orrtanna, PA | PJM Interconnection, LLC (PJM) | 417.0 MWh | Apr 1971 | Dec 2025 | Distillate Fuel Oil |
| Open Sky Dairy | Renewable Solar, Inc | Riverdale, CA | California Independent System Operator (CISO) | 418.8 MWh | Jun 2024 | Dec 2025 | Solar |
| Onancock Diesel Generation Facility | Old Dominion Electric Coop | Onancock, VA | PJM Interconnection, LLC (PJM) | 578.0 MWh | Oct 2002 | Dec 2025 | Distillate Fuel Oil |
| OTHERCitizensHospital | Texas Microgrid, LLC | Victoria, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 588.0 MWh | Mar 2020 | Dec 2025 | Natural Gas |
| Oberlin (OH) | City of Oberlin - (OH) | Oberlin, OH | PJM Interconnection, LLC (PJM) | 593.0 MWh | Dec 1947 | Dec 2025 | Natural Gas : 87.7% Distillate Fuel Oil : 12.3% |
| O'Brien 1 | Generate Capital | Hartford, NY | New York Independent System Operator (NYIS) | 769.0 MWh | Apr 2024 | Mar 2025 | Solar |
| OR - Green Key - Buckner CSG | Buckner Creek Solar, LLC | Oregon, OR | Portland General Electric Company (PGE) | 847.0 MWh | Apr 2025 | Dec 2025 | Solar |
| Oneida East | Azimuth 180 Solar Electric, LLC | Holland Patent, NY | New York Independent System Operator (NYIS) | 891.0 MWh | Aug 2025 | Dec 2025 | Solar |
| OES Biogas Power | Organic Energy Solutions, Inc. | San Bernardino, CA | California Independent System Operator (CISO) | 904.0 MWh | - | Dec 2025 | Other Biomass Gas |
| O H Hutchings | Kimura Power LLC | Miamisburg, OH | PJM Interconnection, LLC (PJM) | 922.0 MWh | Jun 1948 | Dec 2025 | Natural Gas : 99.0% Distillate Fuel Oil : 1.0% |
| Orchard Knob | Orchard Knob Solar LLC | Dallas, OR | PacifiCorp West (PACW) | 993.0 MWh | Dec 2024 | Nov 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 |
| Onondaga County - Metro Water Board | Tesla Inc. | Clay, NY | New York Independent System Operator (NYIS) | 1.1 GWh | Jan 2016 | Dec 2025 | Solar |
| 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 |
| One Market Plaza | Paramount Group Inc | San Francisco, CA | California Independent System Operator (CISO) | 1.2 GWh | Nov 2003 | Dec 2025 | Natural Gas |
| Oregon University System Rabbit Field | Tesla Inc. | Corvallis, OR | PacifiCorp West (PACW) | 1.3 GWh | Feb 2014 | Dec 2025 | Solar |
| Oneida County- DPW | Tesla Inc. | Oriskany, NY | ISO New England (ISNE) | 1.4 GWh | Sep 2017 | Dec 2025 | Solar |
| Oakdale Power Station | Massachusetts Water Res Auth | West Boylston, MA | ISO New England (ISNE) | 1.4 GWh | Apr 1951 | Dec 2025 | Water |
| Owatonna | City of Owatonna - (MN) | Owatonna, MN | Midcontinent Independent System Operator, Inc. (MISO) | 1.4 GWh | Mar 1982 | Dec 2025 | Natural Gas |
| Owens Corning Headquarters | Luminace Solar Holding, LLC | Toledo, OH | PJM Interconnection, LLC (PJM) | 1.5 GWh | Aug 2015 | 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 |
| Oregon Convention Center | Tesla Inc. | Portland, OR | PacifiCorp West (PACW) | 1.5 GWh | Jun 2016 | Dec 2025 | Solar |
| Oak Leaf Solar XXIV LLC (CSG) | Greenbacker Renewable Energy Corporation | Watkins, CO | Public Service Company of Colorado (PSCO) | 1.5 GWh | Dec 2018 | 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 |
| Onset East Community Solar Facility | Kearsarge Onset LLC | Wareham, MA | ISO New England (ISNE) | 1.6 GWh | Mar 2016 | Dec 2025 | Solar |
| Onset West Community Solar Facility | Kearsarge Onset LLC | Wareham, MA | ISO New England (ISNE) | 1.6 GWh | Mar 2016 | Dec 2025 | Solar |
| OTHERTexasA&M | Texas Microgrid, LLC | Bryan, TX | Electric Reliability Council of Texas, Inc. (ERCO) | 1.6 GWh | Apr 2018 | Dec 2025 | Natural Gas |
| Occidental College Solar Project | Occidental College | Los Angeles, CA | Los Angeles Department of Water and Power (LDWP) | 1.6 GWh | Jan 2013 | Dec 2025 | Solar |
| Otis Elevator Company Solar | Otis Elevator Company | Florence, SC | Duke Energy Carolinas (DUK) | 1.7 GWh | Apr 2018 | Dec 2025 | Solar |
| Oaks HOA | Onyx Asset Services Group | Ione, CA | California Independent System Operator (CISO) | 1.7 GWh | Mar 2025 | Dec 2025 | Solar |
| Onyx - Allen Harim | Onyx Asset Services Group | Harbeson, DE | PJM Interconnection, LLC (PJM) | 1.7 GWh | Mar 2017 | Dec 2025 | Solar |
| 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 |
| Olinda Trail Solar | Olinda Trail Solar LLC | Lindstrom, MN | Midcontinent Independent System Operator, Inc. (MISO) | 2.0 GWh | Aug 2019 | Dec 2025 | Solar |
| Oneida - South | Madison Energy Investments LLC | Whitestown, NY | New York Independent System Operator (NYIS) | 2.0 GWh | Nov 2015 | Dec 2025 | Solar |
| Oneida - West | Madison Energy Investments LLC | Whitestown, NY | New York Independent System Operator (NYIS) | 2.1 GWh | Nov 2015 | Oct 2025 | Solar |
| Onondaga County - Oak Orchard WWTP | Tesla Inc. | Clay, NY | New York Independent System Operator (NYIS) | 2.1 GWh | Oct 2017 | Apr 2025 | Solar |
| Ozarks Natural Energy Community Solar | Ozarks Electric Coop Corp - (AR) | Springdale, AR | Southwest Power Pool (SWPP) | 2.1 GWh | Mar 2016 | Dec 2025 | Solar |
| Oakley Solar Project | Oakley Solar Project LLC | Oakley, CA | California Independent System Operator (CISO) | 2.1 GWh | May 2013 | Dec 2025 | Solar |
| Oskaloosa | Today's Power, Inc. | Oskaloosa, KS | Southwest Power Pool (SWPP) | 2.1 GWh | Apr 2021 | Dec 2025 | Solar |
| Orange County Solar Farm (NY) | Tesla Inc. | Goshen, NY | ISO New England (ISNE) | 2.3 GWh | Apr 2017 | 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 |
| Onondaga County- Jamesville | Tesla Inc. | Jamesville, NY | New York Independent System Operator (NYIS) | 2.3 GWh | Feb 2018 | Dec 2025 | Solar |
| Orefield | Madison Energy Investments LLC | Orefield, PA | PJM Interconnection, LLC (PJM) | 2.4 GWh | Nov 2024 | Dec 2025 | Solar |
| Oxnard Wastewater Treatment Plant | City of Oxnard - (CA) | Oxnard, CA | California Independent System Operator (CISO) | 2.4 GWh | Jul 1981 | Aug 2026 | Other Biomass Gas : 99.9% |
| Oltmans SCE at Jurupa | California PV Energy LLC | Ontario, CA | California Independent System Operator (CISO) | 2.4 GWh | Nov 2013 | Dec 2025 | Solar |
| OR -Solops - SPI 18 - Cork | Cork Solar, LLC | Molalla, OR | Portland General Electric Company (PGE) | 2.4 GWh | Nov 2024 | Dec 2025 | Solar |
| Oak Leaf - CSG Portfolio (OL 37) | Distributed Solar Development, LLC | Watkins, CO | Southwest Power Pool (SWPP) | 2.5 GWh | Nov 2020 | Dec 2025 | Solar |
| Ogema | Greenbacker Renewable Energy Corporation | Ogema, WI | Midcontinent Independent System Operator, Inc. (MISO) | 2.5 GWh | Feb 2024 | Dec 2025 | Solar |
| Onondaga County- Clearwater | Tesla Inc. | Oswego, NY | ISO New England (ISNE) | 2.5 GWh | Jun 2017 | Dec 2025 | Solar |
| Oberlin Spear Point Solar One | Oberlin College | Oberlin, OH | PJM Interconnection, LLC (PJM) | 2.5 GWh | Oct 2012 | 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 |
| Orange PV | Terraform Arcadia | Orange, MA | ISO New England (ISNE) | 2.6 GWh | Jun 2013 | Dec 2025 | Solar |
| Onyx - Lamphear Road CSG | Onyx Asset Services Group | Rome, NY | New York Independent System Operator (NYIS) | 2.6 GWh | Sep 2016 | Dec 2025 | Solar |
| Oil Dri 2 Solar | Westbound Solar LLC | Ochlocknee, GA | Southern Company Services, Inc. - Trans (SOCO) | 2.6 GWh | Apr 2019 | Dec 2025 | Solar |
| Oak Leaf - CSG Portfolio (OL 39) | Distributed Solar Development, LLC | Watkins, CO | Southwest Power Pool (SWPP) | 2.7 GWh | May 2021 | Dec 2025 | Solar |
| Oak Leaf Solar XXXIII LLC (Lantz) | Greenbacker Renewable Energy Corporation | Salida, CO | Public Service Company of Colorado (PSCO) | 2.7 GWh | Dec 2019 | Dec 2025 | Solar |
| Oak Leaf Solar XXIII LLC (CSG) | Greenbacker Renewable Energy Corporation | Watkins, CO | Public Service Company of Colorado (PSCO) | 2.7 GWh | Dec 2018 | Dec 2025 | Solar |
| Owens Valley Solar Project 11 | Los Angeles Department of Water & Power | Olancha, CA | Los Angeles Department of Water and Power (LDWP) | 2.7 GWh | Nov 2016 | Dec 2025 | Solar |
| Open View Solar Farm | Cross Pollination Inc | New Haven, VT | ISO New England (ISNE) | 2.8 GWh | Aug 2013 | Dec 2025 | Solar |
| Ottauquechee Hydro | Green Mountain Power Corp | N. Hartland, VT | ISO New England (ISNE) | 2.8 GWh | Mar 1983 | Dec 2025 | Water |
| Otarre Solar Park | TIG Sun Energy IV, LLC | Cayce, SC | Dominion Energy South Carolina, Inc. (SCEG) | 2.8 GWh | Nov 2017 | Dec 2025 | Solar |
| Ottumwa City of | City of Ottumwa - (IA) | Ottumwa, IA | Midcontinent Independent System Operator, Inc. (MISO) | 2.9 GWh | Jul 1931 | Dec 2025 | Water |
| Oregon University System OIT Klamath Fal | Tesla Inc. | Klamath Falls, OR | PacifiCorp West (PACW) | 2.9 GWh | Dec 2013 | 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 |
| Onyx - Saratoga Springs Landfill Solar C | Onyx Asset Services Group | Saratoga Springs, NY | New York Independent System Operator (NYIS) | 2.9 GWh | Oct 2017 | Dec 2025 | Solar |
| O'Shea Solar Farm | DTE Electric Company | Detroit, MI | Midcontinent Independent System Operator, Inc. (MISO) | 2.9 GWh | Jun 2017 | Dec 2025 | Solar |
| Orchard Avenue 1 | Yakima-Tieton Irrigation Dist | Yakima, WA | PacifiCorp West (PACW) | 2.9 GWh | Feb 1987 | Oct 2025 | Water |
| OER Checkerspot | Standard Solar | Tracy's Landing, MD | PJM Interconnection, LLC (PJM) | 3.0 GWh | Nov 2021 | Dec 2025 | Solar |
| Oak Leaf Solar XXVII LLC | Greenbacker Renewable Energy Corporation | Greely, CO | Public Service Company of Colorado (PSCO) | 3.0 GWh | Oct 2018 | Dec 2025 | Solar |
| Oak Leaf - CSG Portfolio (OL 44) | Distributed Solar Development, LLC | Watkins, CO | Southwest Power Pool (SWPP) | 3.0 GWh | Nov 2020 | Dec 2025 | Solar |
| Oak Leaf - CSG Portfolio (OL 38) | Distributed Solar Development, LLC | Watkins, CO | Southwest Power Pool (SWPP) | 3.0 GWh | May 2021 | Dec 2025 | Solar |
| Osage City Solar | Evergy Kansas Central, Inc | Osage City, KS | Southwest Power Pool (SWPP) | 3.1 GWh | Nov 2024 | Dec 2025 | Solar |
| Oxford | CVI CleanCapital Solar 6 | Oxford, MA | ISO New England (ISNE) | 3.1 GWh | Jun 2014 | Dec 2025 | Solar |
| Oak Leaf Solar XXII LLC (CSG) | Greenbacker Renewable Energy Corporation | Denver, CO | Public Service Company of Colorado (PSCO) | 3.1 GWh | Dec 2018 | Dec 2025 | Solar |
| Owens Corning at Bethlehem | Luminace Solar Holding, LLC | Bethlehem, NY | New York Independent System Operator (NYIS) | 3.1 GWh | Sep 2013 | Dec 2025 | Solar |
Summary of Power Plants By State
Figures are based on August 2026 generation numbers.| State | Rank | Active Plants | Aug 2026 Generation |
|---|---|---|---|
| Alabama | # 9 | 80 | 13,897.78 GWh |
| Alaska | # 48 | 146 | 672.99 GWh |
| Arizona | # 10 | 203 | 13,589.64 GWh |
| Arkansas | # 23 | 122 | 7,027.75 GWh |
| California | # 3 | 1,840 | 24,164.86 GWh |
| Colorado | # 30 | 321 | 5,322.30 GWh |
| Connecticut | # 34 | 180 | 4,400.98 GWh |
| Delaware | # 49 | 35 | 555.40 GWh |
| District of Columbia | # 51 | 19 | 21.71 GWh |
| Florida | # 2 | 345 | 28,185.93 GWh |
| Georgia | # 6 | 261 | 15,282.60 GWh |
| Hawaii | # 47 | 73 | 863.62 GWh |
| Idaho | # 43 | 152 | 1,754.56 GWh |
| Illinois | # 5 | 556 | 18,683.36 GWh |
| Indiana | # 17 | 226 | 9,970.06 GWh |
| Iowa | # 27 | 301 | 5,759.64 GWh |
| Kansas | # 26 | 191 | 6,368.18 GWh |
| Kentucky | # 21 | 63 | 7,221.26 GWh |
| Louisiana | # 14 | 93 | 10,670.45 GWh |
| Maine | # 45 | 250 | 1,285.31 GWh |
| Maryland | # 37 | 236 | 3,745.22 GWh |
| Massachusetts | # 41 | 679 | 1,958.59 GWh |
| Michigan | # 12 | 288 | 12,064.19 GWh |
| Minnesota | # 32 | 794 | 5,047.38 GWh |
| Mississippi | # 19 | 62 | 8,358.70 GWh |
| Missouri | # 22 | 134 | 7,125.71 GWh |
| State | Rank | Active Plants | Aug 2026 Generation |
|---|---|---|---|
| Montana | # 40 | 72 | 2,266.60 GWh |
| Nebraska | # 39 | 132 | 3,448.00 GWh |
| Nevada | # 29 | 117 | 5,523.31 GWh |
| New Hampshire | # 42 | 60 | 1,901.10 GWh |
| New Jersey | # 25 | 409 | 6,440.88 GWh |
| New Mexico | # 33 | 166 | 4,571.47 GWh |
| New York | # 11 | 1,087 | 13,130.21 GWh |
| North Carolina | # 8 | 921 | 14,263.55 GWh |
| North Dakota | # 38 | 62 | 3,579.89 GWh |
| Ohio | # 7 | 216 | 14,448.49 GWh |
| Oklahoma | # 13 | 153 | 10,965.38 GWh |
| Oregon | # 31 | 292 | 5,257.14 GWh |
| Pennsylvania | # 4 | 270 | 23,772.83 GWh |
| Rhode Island | # 46 | 108 | 924.31 GWh |
| South Carolina | # 16 | 214 | 9,989.71 GWh |
| South Dakota | # 44 | 53 | 1,486.65 GWh |
| Tennessee | # 18 | 101 | 8,430.26 GWh |
| Texas | # 1 | 1,069 | 65,726.98 GWh |
| Utah | # 36 | 131 | 4,074.82 GWh |
| Vermont | # 50 | 118 | 175.56 GWh |
| Virginia | # 15 | 255 | 10,241.54 GWh |
| Washington | # 20 | 137 | 8,189.60 GWh |
| West Virginia | # 28 | 41 | 5,593.74 GWh |
| Wisconsin | # 24 | 272 | 6,683.19 GWh |
| Wyoming | # 35 | 71 | 4,322.19 GWh |