Electricity Generation Aggregated by Washington County

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

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

Totals are based on the most recent 12 months net generation

List of All Washington Counties