Directory of Power Plants in Pennsylvania
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Ontelaunee Energy Center | Ontelaunee Energy Center | Reading, PA | PJM Interconnection, LLC (PJM) | 3.7 TWh | Apr 2002 | May 2026 | Natural Gas |
| Orchard Park | Borough of Chambersburg - (PA) | Chambersburg, PA | PJM Interconnection, LLC (PJM) | 49.0 GWh | Nov 2003 | May 2026 | Natural Gas : 96.0% Distillate Fuel Oil : 4.0% |
| Orefield | Madison Energy Investments LLC | Orefield, PA | PJM Interconnection, LLC (PJM) | 2.4 GWh | Nov 2024 | Dec 2025 | Solar |
| Orrtanna | Orrtanna Power, LLC | Orrtanna, PA | PJM Interconnection, LLC (PJM) | 417.0 MWh | Apr 1971 | Dec 2025 | Distillate Fuel Oil |
| Oxbow Creek | Oxbow Creek Energy LLC | Factoryville, PA | PJM Interconnection, LLC (PJM) | 40.6 GWh | Nov 2019 | Dec 2025 | Natural Gas |
Browse Power Plants By Pennsylvania Counties
Figures are based on May 2026 generation numbers.| County | State Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Adams County, PA | # 15 | 7 | 6.4 TWh |
| Allegheny County, PA | # 20 | 22 | 4.8 TWh |
| Armstrong County, PA | # 16 | 8 | 6.0 TWh |
| Beaver County, PA | # 4 | 12 | 16.3 TWh |
| Berks County, PA | # 13 | 12 | 6.9 TWh |
| Blair County, PA | # 31 | 6 | 662.2 GWh |
| Bradford County, PA | # 19 | 9 | 5.2 TWh |
| Bucks County, PA | # 7 | 10 | 9.1 TWh |
| Cambria County, PA | # 12 | 11 | 7.5 TWh |
| Carbon County, PA | # 33 | 6 | 470.7 GWh |
| Centre County, PA | # 41 | 6 | 94.2 GWh |
| Chester County, PA | # 50 | 9 | 6.3 GWh |
| Clarion County, PA | # 44 | 4 | 62.2 GWh |
| Clearfield County, PA | # 26 | 7 | 1.3 TWh |
| Cumberland County, PA | # 42 | 8 | 65.7 GWh |
| Dauphin County, PA | # 39 | 6 | 106.7 GWh |
| Delaware County, PA | # 6 | 7 | 10.6 TWh |
| Elk County, PA | # 37 | 1 | 145.0 GWh |
| Erie County, PA | # 47 | 7 | 32.9 GWh |
| Fayette County, PA | # 18 | 8 | 5.6 TWh |
| Franklin County, PA | # 30 | 18 | 965.1 GWh |
| Fulton County, PA | # 38 | 1 | 124.5 GWh |
| Greene County, PA | # 22 | 4 | 4.2 TWh |
| Huntingdon County, PA | # 43 | 2 | 62.8 GWh |
| Indiana County, PA | # 10 | 4 | 8.0 TWh |
| Juniata County, PA | # 49 | 2 | 32.0 GWh |
| Lackawanna County, PA | # 9 | 6 | 8.3 TWh |
| County | State Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Lancaster County, PA | # 25 | 15 | 1.4 TWh |
| Lawrence County, PA | # 11 | 3 | 7.5 TWh |
| Lebanon County, PA | # 23 | 4 | 4.1 TWh |
| Lehigh County, PA | # 51 | 5 | 6.0 GWh |
| Luzerne County, PA | # 2 | 10 | 26.7 TWh |
| Lycoming County, PA | # 17 | 11 | 5.7 TWh |
| Mercer County, PA | # 53 | 2 | 3.5 GWh |
| Monroe County, PA | # 52 | 2 | 4.0 GWh |
| Montgomery County, PA | # 3 | 13 | 19.8 TWh |
| Montour County, PA | # 21 | 2 | 4.7 TWh |
| Northampton County, PA | # 5 | 11 | 13.7 TWh |
| Northumberland County, PA | # 40 | 6 | 100.7 GWh |
| Perry County, PA | # 54 | 1 | 2.1 GWh |
| Philadelphia County, PA | # 27 | 16 | 1.2 TWh |
| Potter County, PA | # 34 | 3 | 290.1 GWh |
| Schuylkill County, PA | # 24 | 14 | 1.7 TWh |
| Snyder County, PA | # 8 | 8 | 8.4 TWh |
| Somerset County, PA | # 29 | 16 | 1.1 TWh |
| Susquehanna County, PA | # 48 | 5 | 32.4 GWh |
| Tioga County, PA | # 35 | 6 | 269.7 GWh |
| Union County, PA | # 45 | 3 | 45.9 GWh |
| Venango County, PA | # 32 | 3 | 602.5 GWh |
| Washington County, PA | # 46 | 8 | 36.4 GWh |
| Wayne County, PA | # 36 | 4 | 165.7 GWh |
| Westmoreland County, PA | # 14 | 4 | 6.5 TWh |
| Wyoming County, PA | # 28 | 4 | 1.1 TWh |
| York County, PA | # 1 | 16 | 35.8 TWh |