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) | 13.2 GWh | Dec 1967 | Dec 2025 | Residual Fuel Oil : 85.5% Distillate Fuel Oil : 14.5% |
Browse Power Plants By Maryland Counties
Figures are based on August 2026 generation numbers.| County | State Rank | Active Plants | Aug 2026 Generation |
|---|---|---|---|
| Calvert County, MD | # 1 | 3 | 14.9 TWh |
| Prince George's County, MD | # 2 | 42 | 8.2 TWh |
| Charles County, MD | # 3 | 6 | 4.0 TWh |
| Anne Arundel County, MD | # 4 | 13 | 3.5 TWh |
| Cecil County, MD | # 5 | 10 | 3.4 TWh |
| Harford County, MD | # 6 | 20 | 1.9 TWh |
| Montgomery County, MD | # 7 | 18 | 833.3 GWh |
| Garrett County, MD | # 8 | 24 | 794.4 GWh |
| Baltimore city, MD | # 9 | 11 | 375.9 GWh |
| Queen Anne's County, MD | # 10 | 10 | 316.6 GWh |
| Allegany County, MD | # 11 | 5 | 200.3 GWh |
| Somerset County, MD | # 12 | 7 | 161.2 GWh |
| County | State Rank | Active Plants | Aug 2026 Generation |
|---|---|---|---|
| Dorchester County, MD | # 13 | 8 | 153.4 GWh |
| Caroline County, MD | # 14 | 2 | 129.9 GWh |
| Washington County, MD | # 15 | 20 | 75.7 GWh |
| Baltimore County, MD | # 16 | 31 | 74.9 GWh |
| Howard County, MD | # 17 | 26 | 73.8 GWh |
| Frederick County, MD | # 18 | 11 | 71.3 GWh |
| Wicomico County, MD | # 19 | 11 | 44.7 GWh |
| Worcester County, MD | # 20 | 5 | 34.3 GWh |
| Carroll County, MD | # 21 | 4 | 24.4 GWh |
| Kent County, MD | # 22 | 6 | 23.0 GWh |
| Talbot County, MD | # 23 | 3 | 12.7 GWh |