Electricity Generation Aggregated by Washington County

State Rank	County	Net Generation (Past Year)	Power Plants
#22	Adams County, WA	455.6 GWh	4
#4	Benton County, WA	10.1 TWh	7
#2	Chelan County, WA	13.8 TWh	6
#17	Clark County, WA	866.7 GWh	2
#10	Columbia County, WA	3.3 TWh	4
#9	Cowlitz County, WA	3.6 TWh	6
#3	Douglas County, WA	11.9 TWh	1
#29	Franklin County, WA	10.9 GWh	3
#18	Garfield County, WA	799.2 GWh	2
#1	Grant County, WA	30.1 TWh	10
#13	Grays Harbor County, WA	1.8 TWh	6
#30	Jefferson County, WA	8.2 GWh	3
#24	King County, WA	392.2 GWh	12
#16	Kittitas County, WA	1.2 TWh	9
#6	Klickitat County, WA	4.9 TWh	17
#5	Lewis County, WA	7.4 TWh	8
#19	Lincoln County, WA	624.1 GWh	2
#28	Mason County, WA	273.6 GWh	3
#7	Pend Oreille County, WA	4.6 TWh	3
#12	Pierce County, WA	2.1 TWh	14
#15	Skagit County, WA	1.5 TWh	4
#21	Skamania County, WA	503.6 GWh	1
#25	Snohomish County, WA	359.3 GWh	9
#20	Spokane County, WA	559.1 GWh	7
#26	Stevens County, WA	302.8 GWh	4
#23	Thurston County, WA	448.5 GWh	4
#11	Walla Walla County, WA	3.2 TWh	4
#8	Whatcom County, WA	3.7 TWh	13
#14	Whitman County, WA	1.8 TWh	6
#27	Yakima County, WA	293.3 GWh	12

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

Totals are based on the most recent 12 months net generation

List of All Washington Counties