Electricity Generation Aggregated by Massachusetts County
| State Rank | County | Net Generation (Past Year) | Power Plants |
|---|---|---|---|
| #2 | Worcester County, MA | 5.1 TWh | 197 |
| #5 | Hampden County, MA | 1.9 TWh | 89 |
| #6 | Plymouth County, MA | 811.3 GWh | 84 |
| #7 | Bristol County, MA | 645.8 GWh | 74 |
| #4 | Middlesex County, MA | 1.9 TWh | 68 |
| #13 | Berkshire County, MA | 163.5 GWh | 46 |
| #3 | Essex County, MA | 2.3 TWh | 41 |
| #1 | Norfolk County, MA | 6.4 TWh | 40 |
| #11 | Hampshire County, MA | 226.9 GWh | 39 |
| #12 | Franklin County, MA | 176.1 GWh | 33 |
| #8 | Barnstable County, MA | 610.8 GWh | 25 |
| #10 | Suffolk County, MA | 431.9 GWh | 14 |
| #9 | Dukes County, MA | 470.9 GWh | 7 |
Net Generation data is based on the last 12 months since Jun 2026
Top 20 Massachusetts Counties by Net Generation
Totals are based on the most recent 12 months net generation- Norfolk County, MA6.41 TWh
- Worcester County, MA5.14 TWh
- Essex County, MA2.32 TWh
- Middlesex County, MA1.88 TWh
- Hampden County, MA1.88 TWh
- Plymouth County, MA811.28 GWh
- Bristol County, MA645.77 GWh
- Barnstable County, MA610.78 GWh
- Dukes County, MA470.86 GWh
- Suffolk County, MA431.89 GWh
- Hampshire County, MA226.85 GWh
- Franklin County, MA176.08 GWh
- Berkshire County, MA163.49 GWh