RANKING · 2020 CENSUS · 39 SHOWN OF 39

Newest housing stock, Washington counties · 2020

Washington counties ranked by median year housing was built (2020 ACS). This list covers the 39 counties in Washington that qualify, ranked against each other statewide. The median across all 39 is 1980.

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SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2010 2020 2024

RANKPLACESTATEPOPMEDIAN YEAR BUILTVS 1990

01Franklin County, WAWA102,6121992+1%

02Clark County, WAWA532,1191991+1%

03San Juan County, WAWA18,5771989+1%

04Thurston County, WAWA304,2611989+1%

05Snohomish County, WAWA870,6561988+1%

06Island County, WAWA85,6571987+1%

07Kittitas County, WAWA48,8031987+1%

08Mason County, WAWA71,1651987+1%

09Whatcom County, WAWA236,3921986+1%

10Jefferson County, WAWA33,9701986+1%

11Grant County, WAWA105,7271985+1%

12Kitsap County, WAWA283,3741985+1%

13Ferry County, WAWA7,5171984+1%

14Pierce County, WAWA946,2881984+1%

15Skagit County, WAWA132,9751983+1%

16Stevens County, WAWA49,6681983+1%

17Benton County, WAWA221,7221982+1%

18Douglas County, WAWA46,4731981+1%

19Okanogan County, WAWA45,2301981+1%

20Wahkiakum County, WAWA4,8731980+1%

21Chelan County, WAWA81,9411980+1%

22Clallam County, WAWA78,20219800%

23King County, WAWA2,344,9391980+1%

24Skamania County, WAWA12,66919800%

25Pend Oreille County, WAWA14,45719790%

26Klickitat County, WAWA24,3311978+1%

27Whitman County, WAWA48,5121977+1%

28Lewis County, WAWA88,0621977+1%

29Pacific County, WAWA24,35719770%

30Spokane County, WAWA558,3441977+1%

31Asotin County, WAWA22,5451976+1%

32Yakima County, WAWA259,1851974+1%

33Adams County, WAWA21,48819740%

34Cowlitz County, WAWA114,8851974+1%

35Grays Harbor County, WAWA78,1441974+1%

36Walla Walla County, WAWA62,3611973+1%

37Lincoln County, WAWA11,9821972+1%

38Columbia County, WAWA4,1411961+1%

39Garfield County, WAWA2,4161952+1%

SHOWING 1–39 OF 39

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS