Directory of Power Plants in Maryland
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Vienna Operations | NRG Vienna Operations Inc | Vienna, MD | PJM Interconnection, LLC (PJM) | 4.6 GWh | Dec 1967 | Dec 2024 | Residual Fuel Oil : 91.4% Distillate Fuel Oil : 8.6% |
Browse Power Plants By Maryland Counties
Figures are based on April 2025 generation numbers.| County | State Rank | Active Plants | Apr 2025 Generation |
|---|---|---|---|
| Calvert County, MD | # 1 | 2 | 14.6 TWh |
| Prince George's County, MD | # 2 | 34 | 6.8 TWh |
| Charles County, MD | # 3 | 6 | 4.0 TWh |
| Cecil County, MD | # 4 | 7 | 3.0 TWh |
| Anne Arundel County, MD | # 5 | 11 | 3.0 TWh |
| Harford County, MD | # 6 | 19 | 1.7 TWh |
| Allegany County, MD | # 7 | 5 | 754.6 GWh |
| Montgomery County, MD | # 8 | 18 | 695.9 GWh |
| Garrett County, MD | # 9 | 14 | 623.4 GWh |
| Baltimore city, MD | # 10 | 11 | 356.5 GWh |
| Queen Anne's County, MD | # 11 | 9 | 196.9 GWh |
| Somerset County, MD | # 12 | 7 | 154.8 GWh |
| County | State Rank | Active Plants | Apr 2025 Generation |
|---|---|---|---|
| Washington County, MD | # 13 | 19 | 79.4 GWh |
| Baltimore County, MD | # 14 | 25 | 65.8 GWh |
| Howard County, MD | # 15 | 21 | 60.4 GWh |
| Frederick County, MD | # 16 | 11 | 59.6 GWh |
| Dorchester County, MD | # 17 | 7 | 50.4 GWh |
| Wicomico County, MD | # 18 | 7 | 43.6 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 | 3.7 GWh |
| Caroline County, MD | # 23 | 2 | 1.3 GWh |