Electricity Generation Aggregated by Washington County

State Rank	County	Net Generation (Past Year)	Power Plants
#21	Skamania County, WA	503.6 GWh	1
#3	Douglas County, WA	11.7 TWh	1
#17	Clark County, WA	812.4 GWh	2
#19	Lincoln County, WA	624.1 GWh	2
#18	Garfield County, WA	811.6 GWh	2
#30	Jefferson County, WA	8.2 GWh	3
#7	Pend Oreille County, WA	4.4 TWh	3
#27	Mason County, WA	273.6 GWh	3
#29	Franklin County, WA	10.9 GWh	3
#11	Walla Walla County, WA	3.2 TWh	4
#23	Thurston County, WA	454.8 GWh	4
#26	Stevens County, WA	302.8 GWh	4
#22	Adams County, WA	456.9 GWh	4
#10	Columbia County, WA	3.3 TWh	4
#15	Skagit County, WA	1.5 TWh	4
#14	Whitman County, WA	1.8 TWh	6
#12	Grays Harbor County, WA	2.1 TWh	6
#9	Cowlitz County, WA	3.7 TWh	6
#2	Chelan County, WA	13.6 TWh	6
#20	Spokane County, WA	560.0 GWh	7
#4	Benton County, WA	10.1 TWh	7
#5	Lewis County, WA	7.3 TWh	8
#25	Snohomish County, WA	359.3 GWh	9
#16	Kittitas County, WA	1.2 TWh	9
#1	Grant County, WA	29.8 TWh	9
#24	King County, WA	392.2 GWh	12
#28	Yakima County, WA	269.1 GWh	12
#8	Whatcom County, WA	4.1 TWh	13
#13	Pierce County, WA	2.1 TWh	14
#6	Klickitat County, WA	5.4 TWh	17

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

Totals are based on the most recent 12 months net generation

List of All Washington Counties