Electricity Generation Aggregated by Montana County

State Rank	County	Net Generation (Past Year)	Power Plants
#4	Cascade County, MT	1.5 TWh	9
#9	Stillwater County, MT	924.6 GWh	9
#7	Yellowstone County, MT	938.6 GWh	8
#14	Wheatland County, MT	493.7 GWh	8
#12	Carbon County, MT	723.6 GWh	5
#1	Rosebud County, MT	10.5 TWh	5
#13	Flathead County, MT	691.7 GWh	4
#16	Lewis and Clark County, MT	412.0 GWh	4
#8	Big Horn County, MT	937.6 GWh	3
#5	Toole County, MT	1.0 TWh	3
#20	Teton County, MT	125.3 GWh	3
#15	Roosevelt County, MT	476.3 GWh	3
#19	Beaverhead County, MT	149.7 GWh	3
#22	Fallon County, MT	88.0 GWh	3
#18	Judith Basin County, MT	373.5 GWh	2
#10	Custer County, MT	799.9 GWh	2
#23	Sweet Grass County, MT	82.8 GWh	2
#17	Deer Lodge County, MT	399.5 GWh	2
#2	Sanders County, MT	1.8 TWh	2
#29	Richland County, MT	11.3 GWh	2
#11	McCone County, MT	756.9 GWh	2
#25	Meagher County, MT	66.5 GWh	1
#31	Gallatin County, MT	7.0 GWh	1
#24	Madison County, MT	75.6 GWh	1
#3	Lincoln County, MT	1.6 TWh	1
#21	Silver Bow County, MT	111.4 GWh	1
#26	Liberty County, MT	31.2 GWh	1
#32	Golden Valley County, MT	4.7 GWh	1
#28	Dawson County, MT	15.9 GWh	1
#6	Lake County, MT	970.6 GWh	1
#27	Broadwater County, MT	27.9 GWh	1
#30	Granite County, MT	9.0 GWh	1

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

Totals are based on the most recent 12 months net generation

List of All Montana Counties