RANKING · 2020 CENSUS · 39 SHOWN OF 39

Largest households, Washington counties · 2020

Washington counties ranked by average household size (2020 ACS). This list covers the 39 counties in Washington that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDMost expensive homes Cheapest homes Highest median rent Lowest median rent Highest homeownership rate Highest renter share

YEAR2010 2020 2024

RANKPLACESTATEPOPAVERAGE HOUSEHOLD SIZEVS 2010

01Franklin County, WAWA102,6123.35+2%

02Adams County, WAWA21,4883.22+2%

03Grant County, WAWA105,7273.00+6%

04Yakima County, WAWA259,1852.95+0%

05Benton County, WAWA221,7222.73+2%

06Douglas County, WAWA46,4732.73+2%

07Clark County, WAWA532,1192.68+1%

08Snohomish County, WAWA870,6562.68+3%

09Pierce County, WAWA946,2882.64+3%

10Chelan County, WAWA81,9412.56−2%

11Skagit County, WAWA132,9752.55+2%

12Mason County, WAWA71,1652.54−3%

13Cowlitz County, WAWA114,8852.53+1%

14Lewis County, WAWA88,0622.52+0%

15Stevens County, WAWA49,6682.51+1%

16Thurston County, WAWA304,2612.50+2%

17Whatcom County, WAWA236,3922.47+1%

18Kitsap County, WAWA283,3742.46−3%

19Walla Walla County, WAWA62,3612.45−1%

20King County, WAWA2,344,9392.43+3%

21Skamania County, WAWA12,6692.43+1%

22Asotin County, WAWA22,5452.41+2%

23Spokane County, WAWA558,3442.41+0%

24Grays Harbor County, WAWA78,1442.39−3%

25Klickitat County, WAWA24,3312.35−1%

26Ferry County, WAWA7,5172.34−14%

27Kittitas County, WAWA48,8032.32+2%

28Pend Oreille County, WAWA14,4572.32−0%

29Whitman County, WAWA48,5122.31−4%

30Island County, WAWA85,6572.31+0%

31Lincoln County, WAWA11,9822.29+1%

32Okanogan County, WAWA45,2302.29−10%

33Clallam County, WAWA78,2022.27+3%

34Garfield County, WAWA2,4162.27−5%

35Wahkiakum County, WAWA4,8732.25+0%

36Pacific County, WAWA24,3572.25+4%

37Columbia County, WAWA4,1412.20−4%

38Jefferson County, WAWA33,9702.06+2%

39San Juan County, WAWA18,5771.98+2%

SHOWING 1–39 OF 39

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS