Directory of Power Plants in Maryland
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Philadelphia | Constellation Power Source Generation, LLC | Baltimore, MD | PJM Interconnection, LLC (PJM) | 4.9 GWh | Jul 1970 | Dec 2024 | Distillate Fuel Oil |
| Perdue Salisbury Photovoltaic | Terraform Arcadia | Salisbury, MD | PJM Interconnection, LLC (PJM) | 1.4 GWh | Aug 2011 | Dec 2024 | Solar |
| Pfeffers | Terraform Arcadia | Kingsville, MD | PJM Interconnection, LLC (PJM) | 1.9 GWh | Apr 2016 | Dec 2024 | Solar |
| Pinesburg Solar LLC | Madison Energy Holdings LLC | Williamsport, MD | PJM Interconnection, LLC (PJM) | 7.5 GWh | Apr 2020 | Dec 2024 | Solar |
| P52ES 1755 Henryton Rd Phase 1 LLC CSG | Nautilus Solar Solutions | Marriottsville, MD | PJM Interconnection, LLC (PJM) | 3.4 GWh | May 2021 | Dec 2024 | Solar |
| P52ES 1755 Henryton Rd Phase 2 LLC | Nautilus Solar Solutions | Marriottsville, MD | PJM Interconnection, LLC (PJM) | 3.8 GWh | May 2021 | Dec 2024 | Solar |
| Pittman Solar One LLC | Nautilus Solar Solutions | Hancock, MD | PJM Interconnection, LLC (PJM) | 3.8 GWh | Nov 2020 | Dec 2024 | Solar |
| Parker Place | Nautilus Solar Solutions | Salisbury, MD | PJM Interconnection, LLC (PJM) | 3.7 GWh | Mar 2024 | Dec 2024 | Solar |
| Perryman | Constellation Power Source Generation, LLC | Harford County, MD | PJM Interconnection, LLC (PJM) | 195.5 GWh | Dec 1971 | Sep 2025 | Natural Gas : 79.7% Distillate Fuel Oil : 20.3% |
Browse Power Plants By Maryland Counties
Figures are based on September 2025 generation numbers.| County | State Rank | Active Plants | Sep 2025 Generation |
|---|---|---|---|
| Calvert County, MD | # 1 | 2 | 14.7 TWh |
| Prince George's County, MD | # 2 | 37 | 6.8 TWh |
| Charles County, MD | # 3 | 6 | 4.4 TWh |
| Cecil County, MD | # 4 | 9 | 3.4 TWh |
| Anne Arundel County, MD | # 5 | 12 | 2.7 TWh |
| Harford County, MD | # 6 | 19 | 1.9 TWh |
| Allegany County, MD | # 7 | 5 | 794.2 GWh |
| Montgomery County, MD | # 8 | 18 | 739.2 GWh |
| Garrett County, MD | # 9 | 16 | 592.3 GWh |
| Baltimore city, MD | # 10 | 11 | 364.7 GWh |
| Queen Anne's County, MD | # 11 | 9 | 241.0 GWh |
| Somerset County, MD | # 12 | 7 | 158.5 GWh |
| County | State Rank | Active Plants | Sep 2025 Generation |
|---|---|---|---|
| Washington County, MD | # 13 | 19 | 78.2 GWh |
| Baltimore County, MD | # 14 | 26 | 65.8 GWh |
| Howard County, MD | # 15 | 25 | 63.5 GWh |
| Frederick County, MD | # 16 | 11 | 58.3 GWh |
| Dorchester County, MD | # 17 | 7 | 50.4 GWh |
| Wicomico County, MD | # 18 | 8 | 43.5 GWh |
| Carroll County, MD | # 19 | 4 | 24.8 GWh |
| Kent County, MD | # 20 | 6 | 17.7 GWh |
| Worcester County, MD | # 21 | 4 | 13.5 GWh |
| Talbot County, MD | # 22 | 3 | 6.6 GWh |
| Caroline County, MD | # 23 | 2 | 1.3 GWh |