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) | 2.9 GWh | Dec 1967 | Dec 2023 | Residual Fuel Oil : 89.4% Distillate Fuel Oil : 10.6% |
Browse Power Plants By Maryland Counties
Figures are based on February 2025 generation numbers.| County | State Rank | Active Plants | Feb 2025 Generation |
|---|---|---|---|
| Calvert County, MD | # 1 | 2 | 15.2 TWh |
| Prince George's County, MD | # 2 | 34 | 6.8 TWh |
| Charles County, MD | # 3 | 6 | 3.8 TWh |
| Cecil County, MD | # 4 | 7 | 3.3 TWh |
| Anne Arundel County, MD | # 5 | 9 | 2.8 TWh |
| Harford County, MD | # 6 | 18 | 1.8 TWh |
| Allegany County, MD | # 7 | 4 | 725.5 GWh |
| Montgomery County, MD | # 8 | 18 | 677.9 GWh |
| Garrett County, MD | # 9 | 12 | 621.9 GWh |
| Baltimore city, MD | # 10 | 11 | 380.4 GWh |
| Queen Anne's County, MD | # 11 | 9 | 196.0 GWh |
| Somerset County, MD | # 12 | 7 | 150.6 GWh |
| County | State Rank | Active Plants | Feb 2025 Generation |
|---|---|---|---|
| Washington County, MD | # 13 | 19 | 78.4 GWh |
| Baltimore County, MD | # 14 | 25 | 60.5 GWh |
| Frederick County, MD | # 15 | 11 | 58.4 GWh |
| Dorchester County, MD | # 16 | 6 | 55.8 GWh |
| Wicomico County, MD | # 17 | 7 | 43.4 GWh |
| Howard County, MD | # 18 | 21 | 36.8 GWh |
| Carroll County, MD | # 19 | 4 | 24.7 GWh |
| Kent County, MD | # 20 | 6 | 18.3 GWh |
| Worcester County, MD | # 21 | 4 | 13.6 GWh |
| Caroline County, MD | # 22 | 2 | 2.6 GWh |
| Talbot County, MD | # 23 | 3 | 630.0 MWh |