Electricity Generation Aggregated by Massachusetts County

State Rank	County	Net Generation (Past Year)	Power Plants
#2	Worcester County, MA	4.9 TWh	200
#10	Suffolk County, MA	427.7 GWh	14
#6	Plymouth County, MA	805.9 GWh	86
#1	Norfolk County, MA	6.1 TWh	40
#4	Middlesex County, MA	1.9 TWh	70
#11	Hampshire County, MA	226.3 GWh	39
#5	Hampden County, MA	1.9 TWh	90
#12	Franklin County, MA	171.9 GWh	33
#3	Essex County, MA	2.2 TWh	41
#8	Dukes County, MA	577.0 GWh	7
#7	Bristol County, MA	645.7 GWh	75
#13	Berkshire County, MA	112.0 GWh	46
#9	Barnstable County, MA	551.2 GWh	25

Net Generation data is based on the last 12 months since Jul 2026

Totals are based on the most recent 12 months net generation

List of All Massachusetts Counties