Electricity Generation Aggregated by Montana County

State Rank	County	Net Generation (Past Year)	Power Plants
#19	Beaverhead County, MT	151.9 GWh	3
#8	Big Horn County, MT	937.7 GWh	3
#27	Broadwater County, MT	27.9 GWh	1
#12	Carbon County, MT	725.4 GWh	5
#4	Cascade County, MT	1.5 TWh	9
#10	Custer County, MT	790.1 GWh	2
#28	Dawson County, MT	15.9 GWh	1
#16	Deer Lodge County, MT	420.9 GWh	2
#22	Fallon County, MT	88.0 GWh	3
#13	Flathead County, MT	692.4 GWh	4
#31	Gallatin County, MT	7.0 GWh	1
#32	Golden Valley County, MT	4.8 GWh	1
#30	Granite County, MT	9.0 GWh	1
#18	Judith Basin County, MT	370.2 GWh	2
#7	Lake County, MT	970.6 GWh	1
#17	Lewis and Clark County, MT	412.3 GWh	4
#26	Liberty County, MT	31.2 GWh	1
#3	Lincoln County, MT	1.6 TWh	1
#24	Madison County, MT	75.6 GWh	1
#11	McCone County, MT	756.9 GWh	2
#25	Meagher County, MT	66.5 GWh	1
#29	Richland County, MT	11.9 GWh	2
#15	Roosevelt County, MT	481.5 GWh	3
#1	Rosebud County, MT	10.5 TWh	5
#2	Sanders County, MT	1.8 TWh	2
#20	Silver Bow County, MT	126.2 GWh	1
#9	Stillwater County, MT	855.8 GWh	9
#23	Sweet Grass County, MT	79.2 GWh	2
#21	Teton County, MT	125.3 GWh	3
#6	Toole County, MT	980.6 GWh	3
#14	Wheatland County, MT	485.2 GWh	8
#5	Yellowstone County, MT	984.3 GWh	8

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

Totals are based on the most recent 12 months net generation

List of All Montana Counties