Electricity Generation Aggregated by Montana County

State Rank	County	Net Generation (Past Year)	Power Plants
#19	Beaverhead County, MT	160.3 GWh	3
#5	Big Horn County, MT	1.3 TWh	3
#26	Broadwater County, MT	47.4 GWh	1
#12	Carbon County, MT	741.1 GWh	5
#4	Cascade County, MT	1.6 TWh	9
#10	Custer County, MT	786.0 GWh	2
#32	Dawson County, MT	2.6 GWh	1
#16	Deer Lodge County, MT	432.4 GWh	2
#22	Fallon County, MT	86.0 GWh	3
#9	Flathead County, MT	789.1 GWh	4
#31	Gallatin County, MT	3.7 GWh	1
#30	Golden Valley County, MT	4.9 GWh	1
#29	Granite County, MT	11.0 GWh	1
#18	Judith Basin County, MT	380.5 GWh	2
#8	Lake County, MT	970.3 GWh	1
#17	Lewis and Clark County, MT	420.8 GWh	4
#27	Liberty County, MT	36.1 GWh	1
#2	Lincoln County, MT	1.9 TWh	1
#24	Madison County, MT	76.2 GWh	1
#11	McCone County, MT	751.6 GWh	2
#25	Meagher County, MT	72.8 GWh	1
#28	Richland County, MT	11.8 GWh	2
#14	Roosevelt County, MT	507.3 GWh	3
#1	Rosebud County, MT	10.7 TWh	5
#3	Sanders County, MT	1.8 TWh	2
#20	Silver Bow County, MT	128.4 GWh	1
#13	Stillwater County, MT	738.9 GWh	9
#23	Sweet Grass County, MT	77.8 GWh	2
#21	Teton County, MT	108.0 GWh	3
#6	Toole County, MT	994.5 GWh	3
#15	Wheatland County, MT	500.7 GWh	8
#7	Yellowstone County, MT	982.2 GWh	8

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

Totals are based on the most recent 12 months net generation

List of All Montana Counties