Electricity Generation Aggregated by Montana County

State Rank	County	Net Generation (Past Year)	Power Plants
#20	Beaverhead County, MT	165.9 GWh	3
#5	Big Horn County, MT	1.3 TWh	3
#26	Broadwater County, MT	47.4 GWh	1
#11	Carbon County, MT	760.9 GWh	5
#4	Cascade County, MT	1.6 TWh	9
#9	Custer County, MT	841.0 GWh	2
#32	Dawson County, MT	2.6 GWh	1
#13	Deer Lodge County, MT	523.8 GWh	2
#22	Fallon County, MT	86.0 GWh	3
#10	Flathead County, MT	790.5 GWh	4
#31	Gallatin County, MT	3.7 GWh	1
#30	Golden Valley County, MT	5.3 GWh	1
#28	Granite County, MT	11.0 GWh	1
#17	Judith Basin County, MT	361.4 GWh	2
#7	Lake County, MT	970.3 GWh	1
#16	Lewis and Clark County, MT	420.9 GWh	4
#27	Liberty County, MT	36.1 GWh	1
#2	Lincoln County, MT	1.9 TWh	1
#23	Madison County, MT	76.2 GWh	1
#12	McCone County, MT	751.6 GWh	2
#24	Meagher County, MT	72.8 GWh	1
#29	Richland County, MT	6.7 GWh	2
#14	Roosevelt County, MT	516.5 GWh	3
#1	Rosebud County, MT	11.9 TWh	5
#3	Sanders County, MT	1.8 TWh	2
#19	Silver Bow County, MT	179.4 GWh	1
#18	Stillwater County, MT	331.1 GWh	9
#25	Sweet Grass County, MT	67.4 GWh	2
#21	Teton County, MT	127.2 GWh	3
#6	Toole County, MT	1.0 TWh	3
#15	Wheatland County, MT	496.8 GWh	8
#8	Yellowstone County, MT	871.7 GWh	8

Net Generation data is based on the last 12 months since Aug 2025

Totals are based on the most recent 12 months net generation

List of All Montana Counties