Electricity Generation Aggregated by Montana County

State Rank	County	Net Generation (Past Year)	Power Plants
#20	Beaverhead County, MT	159.4 GWh	2
#5	Big Horn County, MT	1.3 TWh	3
#27	Broadwater County, MT	39.4 GWh	1
#9	Carbon County, MT	750.8 GWh	5
#2	Cascade County, MT	1.9 TWh	9
#7	Custer County, MT	852.5 GWh	2
#31	Dawson County, MT	1.5 GWh	1
#15	Deer Lodge County, MT	467.5 GWh	1
#22	Fallon County, MT	82.1 GWh	3
#11	Flathead County, MT	701.0 GWh	4
#29	Golden Valley County, MT	5.7 GWh	1
#28	Granite County, MT	11.0 GWh	1
#17	Judith Basin County, MT	369.5 GWh	2
#8	Lake County, MT	804.8 GWh	1
#16	Lewis and Clark County, MT	431.1 GWh	4
#26	Liberty County, MT	44.0 GWh	1
#4	Lincoln County, MT	1.6 TWh	1
#24	Madison County, MT	69.9 GWh	1
#10	McCone County, MT	701.2 GWh	2
#25	Meagher County, MT	66.5 GWh	1
#30	Richland County, MT	2.2 GWh	2
#13	Roosevelt County, MT	573.6 GWh	3
#1	Rosebud County, MT	11.1 TWh	5
#3	Sanders County, MT	1.7 TWh	2
#19	Silver Bow County, MT	194.2 GWh	1
#18	Stillwater County, MT	350.5 GWh	9
#23	Sweet Grass County, MT	73.5 GWh	2
#21	Teton County, MT	140.1 GWh	3
#6	Toole County, MT	1.1 TWh	3
#14	Wheatland County, MT	504.8 GWh	8
#12	Yellowstone County, MT	690.0 GWh	8

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

Totals are based on the most recent 12 months net generation

List of All Montana Counties