Counties in Washington by gini index

Name: Counties in Washington by gini index, 2023
Creator: U.S. Census Bureau
License: Public domain (US federal government work, citation requested)

San Juan County had the highest gini index of 39 counties in 2023, at 53.1 index. Thurston County had the lowest, at 40.6 index. The median was 44.1 index and the figure for Washington was 46.6 index. Source: the U.S. Census Bureau.

Highest53.1San Juan County

Lowest40.6Thurston County

Median44.139 counties

Washington46.6History

All counties, 2023

CSV Chart (SVG)

index. Source: U.S. Census Bureau. Retrieved 2026-10-10.

Full ranking

Rank	Counties	2023 index	Change on 2022
1	San Juan County	53.1	-0.8
2	Whitman County	51.6	-1.1
3	Jefferson County	49.5	+2
4	King County	47.9	+0.2
5	Pacific County	47.5	+1.3
6	Kittitas County	46.5	+0.6
7	Klickitat County	46.5	+0.9
8	Walla Walla County	46.5	+0.6
9	Ferry County	46.3	-1.9
10	Asotin County	46.2	-0.3
11	Chelan County	45.7	+0.2
12	Wahkiakum County	45.6	+2.8
13	Spokane County	45.3	0
14	Whatcom County	45.2	+0.6
15	Pend Oreille County	45.2	+1.7
16	Clallam County	45.2	+1.1
17	Stevens County	45.1	+1.1
18	Adams County	44.4	+0.3
19	Douglas County	44.3	-0.4
20	Okanogan County	44.1	+2
21	Grant County	43.6	+0.7
22	Lincoln County	43.6	-0.1
23	Columbia County	43.5	-3.1
24	Cowlitz County	43.5	-0.3
25	Grays Harbor County	43.5	-0.5
26	Skagit County	43.4	-0.1
27	Benton County	43.3	+0.7
28	Kitsap County	43.1	-0
29	Clark County	42.7	+0.1
30	Yakima County	42.7	+0.5
31	Franklin County	42.5	+0.3
31	Skamania County	42.5	-1.1
33	Snohomish County	42.5	+0.4
34	Lewis County	42.3	0
35	Mason County	42.1	+0.3
36	Pierce County	42	0
37	Island County	41.7	-0.7
38	Garfield County	41	+2.2
39	Thurston County	40.6	-0.1

Other periods

2024
2023
2022
2021

About this ranking

Income inequality on a 0 to 100 scale, where 0 is perfect equality.

Eurostat, equivalised disposable income after social transfers (EU-SILC), for the EU and its countries. For other countries use gini_index_world_bank, which is measured on a different basis. For the United States, ACS five-year estimate B19083 measures inequality in household money income before taxes. Census publishes a coefficient from 0 to 1; Invokely multiplies it by 100. The displayed year is the final year of the five-year period. Negative household incomes are treated as zero. This differs from the EU-SILC measure based on equivalised disposable income and should not be treated as directly comparable.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B19083: Gini index of household income inequality (coefficient multiplied by 100). https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b19083.dat. Retrieved 2026-10-10.

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Questions

Which county has the highest gini index?

San Juan County, with 53.1 index in 2023, according to the U.S. Census Bureau.

Which county has the lowest gini index?

Thurston County, with 40.6 index in 2023.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B19083: Gini index of household income inequality (coefficient multiplied by 100). Retrieved 2026-10-10.