Electricity Generation Aggregated by Massachusetts County
| State Rank | County | Net Generation (Past Year) | Power Plants |
|---|---|---|---|
| #8 | Barnstable County, MA | 628.3 GWh | 25 |
| #12 | Berkshire County, MA | 198.8 GWh | 46 |
| #7 | Bristol County, MA | 645.8 GWh | 74 |
| #10 | Dukes County, MA | 376.1 GWh | 7 |
| #3 | Essex County, MA | 2.5 TWh | 41 |
| #13 | Franklin County, MA | 182.1 GWh | 33 |
| #5 | Hampden County, MA | 1.9 TWh | 89 |
| #11 | Hampshire County, MA | 226.9 GWh | 39 |
| #4 | Middlesex County, MA | 1.9 TWh | 68 |
| #1 | Norfolk County, MA | 6.7 TWh | 40 |
| #6 | Plymouth County, MA | 814.7 GWh | 84 |
| #9 | Suffolk County, MA | 428.0 GWh | 14 |
| #2 | Worcester County, MA | 5.4 TWh | 197 |
Net Generation data is based on the last 12 months since May 2026
Top 20 Massachusetts Counties by Net Generation
Totals are based on the most recent 12 months net generation- Norfolk County, MA6.69 TWh
- Worcester County, MA5.36 TWh
- Essex County, MA2.49 TWh
- Middlesex County, MA1.93 TWh
- Hampden County, MA1.90 TWh
- Plymouth County, MA814.67 GWh
- Bristol County, MA645.77 GWh
- Barnstable County, MA628.28 GWh
- Suffolk County, MA428.01 GWh
- Dukes County, MA376.05 GWh
- Hampshire County, MA226.85 GWh
- Berkshire County, MA198.84 GWh
- Franklin County, MA182.15 GWh