List of Washington Counties by Human Development Index

The list below shows the counties of Washington State by Human Development Index 2024 .San Juan and King counties top the list in Washington with (HDI) values exceeding 0.990. Close behind are Jefferson, Island, and Thurston counties, all registering HDIs above 0.960. At the lower end, Adams, Yakima, and Ferry exhibit the state’s lowest levels of human development, with HDI scores below 0.910. The overall HDI for the state stands at 0.945^[1][2][3].

Washington (state) Counties by Human Development Index

Rank	County	HDI
Very High Human Development
1	San Juan	1.014
2	King	0.992
3	Jefferson	0.967
4	Island County	0.966
5	Thurston	0.964
6	Snohomish	0.961
7	Whitman	0.960
8	Kitsap County	0.960
9	Skagit County	0.955
10	Whatcom County	0.954
11	Skamania County	0.953
12	Kittitas County	0.952
13	Clark	0.950
14	Benton	0.949
15	Walla Walla	0.946
Washington		0.945
16	Lincoln	0.944
17	Pierce	0.943
18	Chelan	0.943
19	Douglas	0.941
20	Spokane	0.940
21	Klickitat	0.938
22	Clallam	0.937
23	Wahkiakum	0.936
24	Pacific	0.933
25	Asotin	0.930
26	Columbia	0.930
27	Garfield	0.929
28	Stevens	0.929
29	Mason	0.927
30	Franklin	0.919
31	Cowlitz	0.916
32	Lewis	0.916
33	Pend Oreille County	0.915
34	Okanogan	0.913
35	Grant	0.913
36	Grays Harbor	0.912
37	Ferry	0.905
38	Yakima	0.902
39	Adams	0.902

Washington Counties by HDI 2024