Directory of Power Plants in Maryland
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Ripley | MN8 Energy LLC | La Plata, MD | PJM Interconnection, LLC (PJM) | 49.1 GWh | Mar 2023 | Jun 2026 | Solar |
| Rock Hall | Terraform Arcadia | Rock Hall, MD | PJM Interconnection, LLC (PJM) | 1.5 GWh | Nov 2012 | Dec 2025 | Solar |
| Rockdale | Altus Power America Management, LLC | Williamsport, MD | PJM Interconnection, LLC (PJM) | 1.6 GWh | Sep 2019 | Nov 2025 | Solar |
| Rockfish Solar LLC | Rockfish Solar LLC | Waldorf, MD | PJM Interconnection, LLC (PJM) | 13.8 GWh | Jul 2015 | Dec 2025 | Solar |
| Roth Rock North Wind Farm, LLC | Roth Rock Wind Farm LLC | Oakland, MD | PJM Interconnection, LLC (PJM) | 25.2 GWh | Jul 2011 | Jun 2026 | Wind |
| Roth Rock Wind Farm LLC | Roth Rock Wind Farm LLC | Oakland, MD | PJM Interconnection, LLC (PJM) | 101.0 GWh | Jul 2011 | Jun 2026 | Wind |
Browse Power Plants By Maryland Counties
Figures are based on June 2026 generation numbers.| County | State Rank | Active Plants | Jun 2026 Generation |
|---|---|---|---|
| Calvert County, MD | # 1 | 3 | 14.9 TWh |
| Prince George's County, MD | # 2 | 42 | 8.1 TWh |
| Charles County, MD | # 3 | 6 | 3.9 TWh |
| Cecil County, MD | # 4 | 10 | 3.6 TWh |
| Anne Arundel County, MD | # 5 | 13 | 3.4 TWh |
| Harford County, MD | # 6 | 20 | 1.9 TWh |
| Montgomery County, MD | # 7 | 18 | 796.3 GWh |
| Garrett County, MD | # 8 | 24 | 731.6 GWh |
| Baltimore city, MD | # 9 | 11 | 378.0 GWh |
| Queen Anne's County, MD | # 10 | 10 | 318.6 GWh |
| Allegany County, MD | # 11 | 5 | 197.1 GWh |
| Somerset County, MD | # 12 | 7 | 159.8 GWh |
| County | State Rank | Active Plants | Jun 2026 Generation |
|---|---|---|---|
| Dorchester County, MD | # 13 | 8 | 103.8 GWh |
| Washington County, MD | # 14 | 20 | 78.1 GWh |
| Howard County, MD | # 15 | 26 | 74.2 GWh |
| Frederick County, MD | # 16 | 11 | 71.2 GWh |
| Baltimore County, MD | # 17 | 31 | 70.0 GWh |
| Caroline County, MD | # 18 | 2 | 55.1 GWh |
| Wicomico County, MD | # 19 | 11 | 44.6 GWh |
| Worcester County, MD | # 20 | 5 | 34.3 GWh |
| Carroll County, MD | # 21 | 4 | 24.4 GWh |
| Kent County, MD | # 22 | 6 | 17.3 GWh |
| Talbot County, MD | # 23 | 3 | 13.4 GWh |