Data / Rankings / Median age / Counties in Washington

Counties in Washington by median age

Jefferson County had the highest median age of 39 counties in 2022, at 59.4 years. Whitman County had the lowest, at 26 years. The median was 41.5 years and the figure for Washington was 38 years. Source: the U.S. Census Bureau.

Highest59.4Jefferson County
Lowest26Whitman County
Median41.539 counties
Washington38History

All counties, 2022

CSVChart (SVG)

Jefferson CountyJefferson County: 59.4 years59.4San Juan CountySan Juan County: 56.5 years56.5Wahkiakum CountyWahkiakum County: 56.3 years56.3Pacific CountyPacific County: 54.7 years54.7Ferry CountyFerry County: 51.8 years51.8Clallam CountyClallam County: 51.2 years51.2Columbia CountyColumbia County: 50.8 years50.8Pend Oreille CountyPend Oreille County: 50.4 years50.4Garfield CountyGarfield County: 49.9 years49.9Klickitat CountyKlickitat County: 47 years47Stevens CountyStevens County: 46.9 years46.9Lincoln CountyLincoln County: 46.7 years46.7Skamania CountySkamania County: 46.6 years46.6Asotin CountyAsotin County: 45.4 years45.4Mason CountyMason County: 45.1 years45.1Grays Harbor CountyGrays Harbor County: 44.4 years44.4Island CountyIsland County: 44.2 years44.2Okanogan CountyOkanogan County: 42.9 years42.9Lewis CountyLewis County: 42.4 years42.4Skagit CountySkagit County: 41.5 years41.5Cowlitz CountyCowlitz County: 40.8 years40.8Chelan CountyChelan County: 40.1 years40.1Kitsap CountyKitsap County: 39.7 years39.7Thurston CountyThurston County: 39.5 years39.5Clark CountyClark County: 38.8 years38.8Snohomish CountySnohomish County: 38.3 years38.3Spokane CountySpokane County: 38 years38Walla Walla CountyWalla Walla County: 38 years38Douglas CountyDouglas County: 37.8 years37.8Whatcom CountyWhatcom County: 37.8 years37.8King CountyKing County: 37.2 years37.2Pierce CountyPierce County: 36.5 years36.5Kittitas CountyKittitas County: 36.4 years36.4Benton CountyBenton County: 36.1 years36.1Grant CountyGrant County: 33.2 years33.2Yakima CountyYakima County: 33 years33Franklin CountyFranklin County: 30.6 years30.6Adams CountyAdams County: 29 years29Whitman CountyWhitman County: 26 years26
years. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2022
years		Change on 2021
1Jefferson County59.4+0.1
2San Juan County56.50
3Wahkiakum County56.3-0.4
4Pacific County54.7+0.3
5Ferry County51.8+1
6Clallam County51.2+0.4
7Columbia County50.8+0.4
8Pend Oreille County50.4+0.1
9Garfield County49.9-0.9
10Klickitat County47+0.8
11Stevens County46.9+0.2
12Lincoln County46.7-0.4
13Skamania County46.60
14Asotin County45.4+0.7
15Mason County45.1+0.4
16Grays Harbor County44.40
17Island County44.2+0.4
18Okanogan County42.90
19Lewis County42.4-0.1
20Skagit County41.50
21Cowlitz County40.80
22Chelan County40.1+0.2
23Kitsap County39.7+0.3
24Thurston County39.5+0.2
25Clark County38.8+0.1
26Snohomish County38.3+0.1
27Spokane County38+0.1
27Walla Walla County38+0.5
29Douglas County37.8+0.3
29Whatcom County37.80
31King County37.2+0.1
32Pierce County36.5+0.1
33Kittitas County36.4+2.1
34Benton County36.10
35Grant County33.20
36Yakima County330
37Franklin County30.6+0.1
38Adams County29+0.7
39Whitman County26+1

Other periods

About this ranking

Age that divides the resident population into two halves of equal size. Spain and the EU: on 1 January. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

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 B01002: median age, total population. https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b01002.dat. Retrieved 2026-10-08.

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Questions

Which county has the highest median age?

Jefferson County, with 59.4 years in 2022, according to the U.S. Census Bureau.

Which county has the lowest median age?

Whitman County, with 26 years in 2022.

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 B01002: median age, total population. Retrieved 2026-10-08.

Median age: other rankings

Counties in Washington: more rankings