Data / Rankings / Population aged 65 and over / Counties in Washington

Counties in Washington by share of population aged 65 and over

Jefferson County had the highest share of population aged 65 and over of 39 counties in 2020, at 39.4%. Franklin County had the lowest, at 10%. The median was 21.6% and the figure for Washington was 16.3%. Source: the U.S. Census Bureau.

Highest39.4Jefferson County
Lowest10Franklin County
Median21.639 counties
Washington16.3History

All counties, 2020

CSVChart (SVG)

Jefferson CountyJefferson County: 39.4 %39.4San Juan CountySan Juan County: 34.7 %34.7Clallam CountyClallam County: 32.1 %32.1Wahkiakum CountyWahkiakum County: 32.1 %32.1Pacific CountyPacific County: 31.8 %31.8Ferry CountyFerry County: 29.6 %29.6Columbia CountyColumbia County: 29 %29Pend Oreille CountyPend Oreille County: 27.8 %27.8Garfield CountyGarfield County: 27.4 %27.4Lincoln CountyLincoln County: 26.9 %26.9Island CountyIsland County: 26.3 %26.3Stevens CountyStevens County: 24.7 %24.7Asotin CountyAsotin County: 24.3 %24.3Okanogan CountyOkanogan County: 24 %24Klickitat CountyKlickitat County: 23.8 %23.8Mason CountyMason County: 23.7 %23.7Grays Harbor CountyGrays Harbor County: 22.6 %22.6Skagit CountySkagit County: 22.4 %22.4Skamania CountySkamania County: 22 %22Lewis CountyLewis County: 21.6 %21.6Chelan CountyChelan County: 20.6 %20.6Walla Walla CountyWalla Walla County: 20 %20Cowlitz CountyCowlitz County: 19.9 %19.9Kitsap CountyKitsap County: 19.1 %19.1Whatcom CountyWhatcom County: 18.7 %18.7Thurston CountyThurston County: 18.3 %18.3Douglas CountyDouglas County: 18.1 %18.1Kittitas CountyKittitas County: 17.7 %17.7Spokane CountySpokane County: 17.3 %17.3Clark CountyClark County: 16.5 %16.5Benton CountyBenton County: 15.8 %15.8Pierce CountyPierce County: 14.7 %14.7Grant CountyGrant County: 14.6 %14.6Yakima CountyYakima County: 14.6 %14.6Snohomish CountySnohomish County: 14.5 %14.5King CountyKing County: 13.5 %13.5Whitman CountyWhitman County: 12 %12Adams CountyAdams County: 11.6 %11.6Franklin CountyFranklin County: 10 %10
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2020 (%)
1Jefferson County39.4
2San Juan County34.7
3Clallam County32.1
4Wahkiakum County32.1
5Pacific County31.8
6Ferry County29.6
7Columbia County29
8Pend Oreille County27.8
9Garfield County27.4
10Lincoln County26.9
11Island County26.3
12Stevens County24.7
13Asotin County24.3
14Okanogan County24
15Klickitat County23.8
16Mason County23.7
17Grays Harbor County22.6
18Skagit County22.4
19Skamania County22
20Lewis County21.6
21Chelan County20.6
22Walla Walla County20
23Cowlitz County19.9
24Kitsap County19.1
25Whatcom County18.7
26Thurston County18.3
27Douglas County18.1
28Kittitas County17.7
29Spokane County17.3
30Clark County16.5
31Benton County15.8
32Pierce County14.7
33Grant County14.6
34Yakima County14.6
35Snohomish County14.5
36King County13.5
37Whitman County12
38Adams County11.6
39Franklin County10

Other periods

About this ranking

Residents aged 65 or over as a percentage of total population. Spain: 1 January, INE annual census. United States: 1 July, Census Bureau population estimates. World Bank figures for other countries and the World refer to mid-year.

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. Population Estimates Program, county population by age and sex (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties. https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/counties/asrh/cc-est2025-agesex-all.csv. Retrieved 2026-10-09.

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Rank Counties in Washington by share of population aged 65 and over using official data, and cite the source.
rank_places {"indicator":"population_65_plus_share","level":"province","within":"Washington","limit":10}
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Questions

Which county has the highest share of population aged 65 and over?

Jefferson County, with 39.4% in 2020, according to the U.S. Census Bureau.

Which county has the lowest share of population aged 65 and over?

Franklin County, with 10% in 2020.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program, county population by age and sex (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties. Retrieved 2026-10-09.

Population aged 65 and over: other rankings

Counties in Washington: more rankings