Electricity Generation Aggregated by Montana County

State Rank	County	Net Generation (Past Year)	Power Plants
#4	Cascade County, MT	1.5 TWh	9
#8	Stillwater County, MT	960.2 GWh	9
#6	Yellowstone County, MT	982.1 GWh	8
#14	Wheatland County, MT	489.5 GWh	8
#12	Carbon County, MT	716.0 GWh	5
#1	Rosebud County, MT	10.3 TWh	5
#13	Flathead County, MT	690.8 GWh	4
#16	Lewis and Clark County, MT	411.7 GWh	4
#9	Big Horn County, MT	937.5 GWh	3
#5	Toole County, MT	998.0 GWh	3
#20	Teton County, MT	125.3 GWh	3
#15	Roosevelt County, MT	474.7 GWh	3
#19	Beaverhead County, MT	149.6 GWh	3
#22	Fallon County, MT	88.0 GWh	3
#17	Judith Basin County, MT	367.2 GWh	2
#10	Custer County, MT	800.0 GWh	2
#23	Sweet Grass County, MT	81.7 GWh	2
#18	Deer Lodge County, MT	363.9 GWh	2
#2	Sanders County, MT	1.8 TWh	2
#29	Richland County, MT	11.7 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	97.4 GWh	1
#26	Liberty County, MT	31.2 GWh	1
#32	Golden Valley County, MT	4.6 GWh	1
#28	Dawson County, MT	15.9 GWh	1
#7	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