Oil and petroleum power plants in the United States
Oil-fired units in the 2025 EIA-860 data total 32.0 GW of nameplate capacity, 2.3% of the US fleet. It is the main source at 857 plants; New York has the most, with 3,877 MW. More of today’s oil-fired capacity came online in 1972 than in any other year (2,501 MW). The oldest unit still working went into service in 1915 at Wakefield, Nebraska.
When today’s oil-fired capacity was built
Above the line: capacity still operable in 2025, by the year each unit came online. Below: oil-fired capacity retired in each year, including plants that have closed completely (EIA’s retired-generator file).
States with the most oil-fired capacity
Largest units
The single biggest oil-fired generator is unit ST5 at Oswego Harbor Power, rated at 902 MW.
| Plant | State | Unit size | Online |
|---|---|---|---|
| Oswego Harbor Power | New York | 902 MW | 1975 |
| Oswego Harbor Power | New York | 902 MW | 1979 |
| Brame Energy Center | Louisiana | 704 MW | 2010 |
| William F Wyman Hybrid | Maine | 632 MW | 1978 |
| Canal | Massachusetts | 585 MW | 1968 |
| Canal | Massachusetts | 580 MW | 1976 |
| New Haven Steam | Connecticut | 460 MW | 1975 |
| Middletown | Connecticut | 415 MW | 1973 |
The 25 largest oil-fired plants
| Rank | Plant | State | Runs on | Capacity | First unit | Operator |
|---|---|---|---|---|---|---|
| 1 | Oswego Harbor Power | New York | Oil and petroleum | 1,804 MW | 1975 | Oswego Harbor Power |
| 2 | Brame Energy Center | Louisiana | Oil and petroleum | 1,707 MW | 1975 | Cleco Power LLC |
| 3 | Canal | Massachusetts | Oil and petroleum | 1,495 MW | 1968 | Canal Generating LLC |
| 4 | William F Wyman Hybrid | Maine | Oil and petroleum | 863 MW | 1957 | FPL Energy Wyman LLC |
| 5 | Middletown | Connecticut | Oil and petroleum | 786 MW | 1958 | Middletown Power LLC |
| 6 | Herbert A Wagner | Maryland | Oil and petroleum | 774 MW | 1966 | H.A. Wagner LLC |
| 7 | DeBary | Florida | Oil and petroleum | 748 MW | 1975 | Duke Energy Florida, LLC |
| 8 | New Haven Steam | Connecticut | Oil and petroleum | 642 MW | 1975 | Generation Bridge II Connecticut, LLC |
| 9 | Kahe | Hawaii | Oil and petroleum | 610 MW | 1963 | Hawaiian Electric Co Inc |
| 10 | Holtsville | New York | Oil and petroleum | 567 MW | 1974 | National Grid Generation LLC |
| 11 | McManus | Georgia | Oil and petroleum | 560 MW | 1964 | Georgia Power Co |
| 12 | Croydon CT Generating Station | Pennsylvania | Oil and petroleum | 546 MW | 1974 | Constellation Power, Inc |
| 13 | Stony Brook | Massachusetts | Oil and petroleum | 542 MW | 1981 | Massachusetts Mun Wholes Electric Co |
| 14 | Northeast (MO) | Missouri | Oil and petroleum | 540 MW | 1972 | Evergy Metro |
| 15 | Morgan Creek | Texas | Oil and petroleum | 536 MW | 1988 | Luminant Generation Company LLC |
| 16 | Montville Station | Connecticut | Oil and petroleum | 495 MW | 1954 | Montville Power LLC |
| 17 | Commonwealth Chesapeake | Virginia | Oil and petroleum | 414 MW | 2000 | Commonwealth Chesapeake Co LLC |
| 18 | Newington | New Hampshire | Oil and petroleum | 414 MW | 1974 | Granite Shore Power |
| 19 | Germantown | Wisconsin | Oil and petroleum | 391 MW | 1978 | Wisconsin Electric Power Co |
| 20 | Waiau | Hawaii | Oil and petroleum | 375 MW | 1959 | Hawaiian Electric Co Inc |
| 21 | Wilson | Georgia | Oil and petroleum | 318 MW | 1972 | Georgia Power Co |
| 22 | Kalaeloa Cogen Plant | Hawaii | Oil and petroleum | 299 MW | 1989 | Kalaeloa Partners LP |
| 23 | Fisk Street | Illinois | Oil and petroleum | 260 MW | 1968 | Midwest Generations EME LLC |
| 24 | Morgantown Generating Plant | Maryland | Oil and petroleum | 260 MW | 1973 | Lanyard Power Holdings, LLC |
| 25 | GenConn Devon LLC | Connecticut | Oil and petroleum | 242 MW | 2010 | GenConn Devon LLC |