Natural gas plants are the workhorse of the modern grid. Combined-cycle units achieve very high efficiency and can ramp up and down quickly to balance variable renewables. They emit roughly half the CO₂ per MWh of coal and far less of other pollutants, but they still release upstream methane during fuel extraction.
| Plant | State | Capacity | Operator |
|---|---|---|---|
| West County Energy Center | Florida | 4,263 MW | Florida Power & Light Co |
| Crystal River | Florida | 3,449 MW | Duke Energy Florida, Llc |
| Barry | Alabama | 3,344 MW | Alabama Power Co |
| Manatee | Florida | 2,951 MW | Florida Power & Light Co |
| Jack Mcdonough | Georgia | 2,848 MW | Georgia Power Co |
| Fort Myers | Florida | 2,681 MW | Florida Power & Light Co |
| Lauderdale | Florida | 2,664 MW | Florida Power & Light Co |
| Belews Creek | North Carolina | 2,491 MW | Duke Energy Carolinas, Llc |
| Martin | Florida | 2,449 MW | Florida Power & Light Co |
| Nine Mile Point | Louisiana | 2,440 MW | Entergy Louisiana Llc |
| Union Power Station | Arkansas | 2,428 MW | Entergy Arkansas Llc |
| H L Culbreath Bayside Power Station | Florida | 2,399 MW | Tampa Electric Co |
| Sanford | Florida | 2,378 MW | Florida Power & Light Co |
| Big Bend | Florida | 2,275 MW | Tampa Electric Co |
| Hines Energy Complex | Florida | 2,266 MW | Duke Energy Florida, Llc |
| Sherwood H Smith Jr Energy Complex | North Carolina | 2,245 MW | Duke Energy Progress - (Nc) |
| Victor J Daniel Jr | Mississippi | 2,229 MW | Mississippi Power Co |
| Ravenswood | New York | 2,162 MW | Ravenswood Operations Llc |
| Dynegy Moss Landing Power Plant Hybrid | California | 2,148 MW | Dynegy -Moss Landing Llc |
| Gulf Clean Energy Center | Florida | 2,108 MW | Florida Power & Light Co |
| Guernsey Power Station | Ohio | 2,055 MW | Guernsey Power Station Llc |
| Hf Lee Plant | North Carolina | 2,048 MW | Duke Energy Progress - (Nc) |
| H Allen Franklin Combined Cycle | Alabama | 1,996 MW | Southern Power Co |
| Forney Energy Center | Texas | 1,894 MW | Lafrontera Holdings Llc |
| Gila River Power Block 4 | Arizona | 1,857 MW | Salt River Project |
| Midland Cogeneration Venture | Michigan | 1,854 MW | Midland Cogeneration Venture |
| Paradise | Kentucky | 1,854 MW | Tennessee Valley Authority |
| Chalk Point Power | Maryland | 1,825 MW | Chalk Point Power, Llc |
| Sabine | Texas | 1,812 MW | Entergy Texas Inc. |
| Aes Alamitos Llc | California | 1,793 MW | Aes Alamitos Llc |
| Allen | Tennessee | 1,792 MW | Tennessee Valley Authority |
| Greensville County Power Station | Virginia | 1,773 MW | Virginia Electric & Power Co |
| Talenenergy Montour | Pennsylvania | 1,758 MW | Talenenergy Montour Llc |
| Lincoln Combustion | North Carolina | 1,754 MW | Duke Energy Carolinas, Llc |
| Mystic Generating Station | Massachusetts | 1,744 MW | Constellation Mystic Power Llc |
| Pseg Linden Generating Station | New Jersey | 1,740 MW | Linden Combined Cycle |
| Haynes | California | 1,739 MW | Los Angeles Department Of Water & Power |
| Midlothian Energy Facility | Texas | 1,734 MW | Midlothian Energy Llc |
| Elwood Energy Llc | Illinois | 1,728 MW | Elwood Energy Llc |
| Okeechobee Clean Energy Center | Florida | 1,723 MW | Florida Power & Light Co |
| Muskogee | Oklahoma | 1,716 MW | Oklahoma Gas & Electric Co |
| V H Braunig | Texas | 1,713 MW | City Of San Antonio - (Tx) |
| Seminole (Ok) | Oklahoma | 1,701 MW | Oklahoma Gas & Electric Co |
| Lagoon Creek | Tennessee | 1,625 MW | Tennessee Valley Authority |
| Brunner Island | Pennsylvania | 1,616 MW | Brunner Island Llc |
| Ormond Beach | California | 1,612 MW | Ormond Beach Power, Llc |
| Temple Power Station | Texas | 1,606 MW | Temple Generation Holdings Llc |
| Northport | New York | 1,564 MW | National Grid Generation Llc |
| James E. Rogers Energy Complex | North Carolina | 1,531 MW | Duke Energy Carolinas, Llc |
| Cedar Bayou | Texas | 1,530 MW | Nrg Texas Power Llc |
| Chesterfield | Virginia | 1,500 MW | Virginia Electric & Power Co |
| Lackawanna Energy Center | Pennsylvania | 1,499 MW | Invenergy Services Llc |
| Canal | Massachusetts | 1,495 MW | Canal Generating Llc |
| Polk | Florida | 1,493 MW | Tampa Electric Co |
| Northeastern | Oklahoma | 1,478 MW | Public Service Co Of Oklahoma |
| P L Bartow | Florida | 1,476 MW | Duke Energy Florida, Llc |
| Warren County | Virginia | 1,472 MW | Virginia Electric & Power Co |
| Brunswick County Power Station | Virginia | 1,472 MW | Virginia Electric & Power Co |
| Chuck Lenzie Generating Station | Nevada | 1,466 MW | Nevada Power Co |
| York Energy Center | Pennsylvania | 1,449 MW | Calpine Mid-Merit Llc |
| Dania Beach 7 | Florida | 1,448 MW | Florida Power & Light Co |
| R S Nelson | Louisiana | 1,434 MW | Entergy Louisiana Llc |
| Cottonwood Energy Company Lp | Texas | 1,434 MW | Nrg Cottonwood Tenant Llc |
| Redbud Power Plant | Oklahoma | 1,434 MW | Oklahoma Gas & Electric Co |
| Hanging Rock Energy Facility | Ohio | 1,430 MW | Dynegy Hanging Rock Energy Facility |
| Johnsonville | Tennessee | 1,426 MW | Tennessee Valley Authority |
| Northside Generating Station | Florida | 1,407 MW | Jea |
| Bergen Generating Station | New Jersey | 1,401 MW | Bergen Generating Station |
| Acadia Energy Center | Louisiana | 1,389 MW | Cleco Power Llc |
| Mesquite Generating Station Block 2 | Arizona | 1,383 MW | Mesquite Power Llc |
| Mcintosh Combined Cycle Facility | Georgia | 1,377 MW | Georgia Power Co |
| Clark (Nve) | Nevada | 1,376 MW | Nevada Power Co |
| Kiamichi Energy Facility | Oklahoma | 1,370 MW | Kiowa Power Partners Llc |
| Port Everglades | Florida | 1,352 MW | Florida Power & Light Co |
| Astoria Generating Station | New York | 1,345 MW | U S Power Generating Company Llc |
| Fairless Energy Center | Pennsylvania | 1,338 MW | Edgewater Generation, Llc |
| Santan | Arizona | 1,326 MW | Salt River Project |
| Joliet 29 | Illinois | 1,320 MW | Midwest Generations Eme Llc |
| Handley | Texas | 1,315 MW | Constellation Power, Inc |
| Doswell Energy Center | Virginia | 1,313 MW | Doswell Ltd Partnership |
| Cricket Valley Energy | New York | 1,313 MW | Cricket Valley Energy Center Llc |
| E B Harris Electric Generating Plant | Alabama | 1,304 MW | Southern Power Co |
| Cpv Three Rivers Energy Center | Illinois | 1,300 MW | Cpv Three Rivers, Llc |
| Cape Canaveral | Florida | 1,295 MW | Florida Power & Light Co |
| Riviera | Florida | 1,295 MW | Florida Power & Light Co |
| Jackson Generation, Llc | Illinois | 1,289 MW | Jackson Generation, Llc |
| Greene County | Alabama | 1,288 MW | Alabama Power Co |
| Jack County | Texas | 1,280 MW | Jack County Power, Llc |
| Harquahala Generating Project | Arizona | 1,277 MW | New Harquahala Generating Co, Llc |
| Blue Water Energy Center | Michigan | 1,267 MW | Dte Electric Company |
| Kendall County Generation Facility | Illinois | 1,256 MW | Dynegy Kendall Energy Llc |
| Lake Side Power Plant | Utah | 1,247 MW | Pacificorp |
| Astoria Energy | New York | 1,245 MW | Astoria Energy Llc |
| Bowline Point | New York | 1,242 MW | Bowline, Llc |
| Wansley Combined Cycle | Georgia | 1,239 MW | Southern Power Co |
| Lawrenceburg Power, Llc | Indiana | 1,232 MW | Lawrenceburg Power, Llc |
| Wolf Hollow Ii | Texas | 1,231 MW | Constellation Power, Inc |
| Colorado Bend Ii | Texas | 1,230 MW | Constellation Power, Inc |
| Port Washington Generating Station | Wisconsin | 1,230 MW | Wisconsin Electric Power Co |
| Athens Generating Plant | New York | 1,222 MW | New Athens Generating Company Llc |