RANKING · 2024 ACS · 39 SHOWN OF 39

Largest households, Washington counties

Washington counties ranked by average household size (2024 ACS). This list covers the 39 counties in Washington that qualify, ranked against each other statewide. The median across all 39 is 2.44. Biggest climber in the top 100 since 2020: Lincoln County, WA, up 7 places to #24.

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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

01▲1Adams County, WAWA21,4883.25+3%

02▼1Franklin County, WAWA102,6123.21−2%

03▲1Yakima County, WAWA259,1852.89−2%

04▼1Grant County, WAWA105,7272.79−2%

05▲1Douglas County, WAWA46,4732.73+2%

06▼1Benton County, WAWA221,7222.70+1%

07▲1Snohomish County, WAWA870,6562.64+2%

08▼1Clark County, WAWA532,1192.62−1%

09Pierce County, WAWA946,2882.59+1%

10▲4Lewis County, WAWA88,0622.56+2%

11▲1Mason County, WAWA71,1652.55−3%

12▲1Cowlitz County, WAWA114,8852.53+1%

13▲5Kitsap County, WAWA283,3742.49−2%

14▼4Chelan County, WAWA81,9412.49−5%

15▲1Thurston County, WAWA304,2612.48+2%

16▼5Skagit County, WAWA132,9752.47−2%

17▼2Stevens County, WAWA49,6682.470%

18▲3Skamania County, WAWA12,6692.45+2%

19Walla Walla County, WAWA62,3612.44−2%

20▲3Spokane County, WAWA558,3442.44+1%

21▲3Grays Harbor County, WAWA78,1442.42−2%

22▼5Whatcom County, WAWA236,3922.40−2%

23▼3King County, WAWA2,344,9392.39+1%

24▲7Lincoln County, WAWA11,9822.36+4%

25▲5Island County, WAWA85,6572.35+2%

26▼4Asotin County, WAWA22,5452.350%

27▲1Pend Oreille County, WAWA14,4572.340%

28▼3Klickitat County, WAWA24,3312.32−2%

29▲3Okanogan County, WAWA45,2302.32−9%

30▼4Ferry County, WAWA7,5172.29−16%

31▼4Kittitas County, WAWA48,8032.280%

32▲2Garfield County, WAWA2,4162.25−6%

33▲2Wahkiakum County, WAWA4,8732.20−2%

34▼5Whitman County, WAWA48,5122.18−10%

35▼2Clallam County, WAWA78,2022.18−1%

36Pacific County, WAWA24,3572.160%

37Columbia County, WAWA4,1412.12−7%

38▲1San Juan County, WAWA18,5772.03+5%

39▼1Jefferson County, WAWA33,9702.020%

SHOWING 1–39 OF 39

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES