Electricity Generation Aggregated by Montana County

State Rank	County	Net Generation (Past Year)	Power Plants
#6	Yellowstone County, MT	979.3 GWh	8
#15	Wheatland County, MT	504.8 GWh	8
#8	Toole County, MT	950.2 GWh	3
#21	Teton County, MT	127.2 GWh	3
#25	Sweet Grass County, MT	69.8 GWh	2
#13	Stillwater County, MT	572.4 GWh	9
#20	Silver Bow County, MT	146.2 GWh	1
#3	Sanders County, MT	1.8 TWh	2
#1	Rosebud County, MT	11.4 TWh	5
#14	Roosevelt County, MT	510.4 GWh	3
#28	Richland County, MT	12.4 GWh	2
#24	Meagher County, MT	72.8 GWh	1
#11	McCone County, MT	751.6 GWh	2
#23	Madison County, MT	76.2 GWh	1
#2	Lincoln County, MT	1.9 TWh	1
#27	Liberty County, MT	36.1 GWh	1
#17	Lewis and Clark County, MT	420.7 GWh	4
#7	Lake County, MT	970.3 GWh	1
#18	Judith Basin County, MT	368.8 GWh	2
#29	Granite County, MT	11.0 GWh	1
#30	Golden Valley County, MT	4.9 GWh	1
#31	Gallatin County, MT	3.7 GWh	1
#10	Flathead County, MT	790.0 GWh	4
#22	Fallon County, MT	86.0 GWh	3
#16	Deer Lodge County, MT	468.6 GWh	2
#32	Dawson County, MT	2.6 GWh	1
#9	Custer County, MT	807.6 GWh	2
#4	Cascade County, MT	1.6 TWh	9
#12	Carbon County, MT	750.8 GWh	5
#26	Broadwater County, MT	47.4 GWh	1
#5	Big Horn County, MT	1.3 TWh	3
#19	Beaverhead County, MT	164.2 GWh	3

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

Totals are based on the most recent 12 months net generation

List of All Montana Counties