Data / Rankings / Population aged 18 to 64 / Counties in Washington

Counties in Washington by population aged 18 to 64

Whitman County had the highest population aged 18 to 64 of 39 counties in 2022, at 71.4%. Jefferson County had the lowest, at 46.7%. The median was 56.4% and the figure for Washington was 61.5%. Source: the U.S. Census Bureau.

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Highest71.4Whitman County
Lowest46.7Jefferson County
Median56.439 counties
Washington61.5History

Map of counties, 2022

Adams County: 54.4 %Asotin County: 54.6 %Benton County: 57.9 %Chelan County: 56.5 %Clallam County: 50.5 %Clark County: 60.3 %Columbia County: 54.2 %Cowlitz County: 57 %Douglas County: 57.1 %Ferry County: 51.3 %Franklin County: 58.8 %Garfield County: 49.9 %Grant County: 56.7 %Grays Harbor County: 56.4 %Island County: 54.6 %Jefferson County: 46.7 %King County: 66.1 %Kitsap County: 60.1 %Kittitas County: 63.6 %Klickitat County: 56.3 %Lewis County: 55.9 %Lincoln County: 51.6 %Mason County: 56.1 %Okanogan County: 53.6 %Pacific County: 51.1 %Pend Oreille County: 52 %Pierce County: 61.7 %San Juan County: 50.5 %Skagit County: 55.4 %Skamania County: 58.9 %Snohomish County: 62.4 %Spokane County: 60.4 %Stevens County: 53 %Thurston County: 59.6 %Wahkiakum County: 51.3 %Walla Walla County: 58.3 %Whatcom County: 61.5 %Whitman County: 71.4 %Yakima County: 56.8 %
  • Under 51
  • 51 to 55
  • 55 to 56
  • 56 to 58
  • 58 to 60
  • 60 and over
%, 2022. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2022

Whitman County: 71.4 %Whitman County71.4King County: 66.1 %King County66.1Kittitas County: 63.6 %Kittitas County63.6Snohomish County: 62.4 %Snohomish County62.4Pierce County: 61.7 %Pierce County61.7Whatcom County: 61.5 %Whatcom County61.5Spokane County: 60.4 %Spokane County60.4Clark County: 60.3 %Clark County60.3Kitsap County: 60.1 %Kitsap County60.1Thurston County: 59.6 %Thurston County59.6Skamania County: 58.9 %Skamania County58.9Franklin County: 58.8 %Franklin County58.8Walla Walla County: 58.3 %Walla Walla County58.3Benton County: 57.9 %Benton County57.9Douglas County: 57.1 %Douglas County57.1Cowlitz County: 57 %Cowlitz County57Yakima County: 56.8 %Yakima County56.8Grant County: 56.7 %Grant County56.7Chelan County: 56.5 %Chelan County56.5Grays Harbor County: 56.4 %Grays Harbor County56.4Klickitat County: 56.3 %Klickitat County56.3Mason County: 56.1 %Mason County56.1Lewis County: 55.9 %Lewis County55.9Skagit County: 55.4 %Skagit County55.4Island County: 54.6 %Island County54.6Asotin County: 54.6 %Asotin County54.6Adams County: 54.4 %Adams County54.4Columbia County: 54.2 %Columbia County54.2Okanogan County: 53.6 %Okanogan County53.6Stevens County: 53 %Stevens County53Pend Oreille County: 52 %Pend Oreille County52Lincoln County: 51.6 %Lincoln County51.6Ferry County: 51.3 %Ferry County51.3Wahkiakum County: 51.3 %Wahkiakum County51.3Pacific County: 51.1 %Pacific County51.1San Juan County: 50.5 %San Juan County50.5Clallam County: 50.5 %Clallam County50.5Garfield County: 49.9 %Garfield County49.9Jefferson County: 46.7 %Jefferson County46.7Whitman County: 71.4 %Whitman County71.4King County: 66.1 %King County66.1Kittitas County: 63.6 %Kittitas County63.6Snohomish County: 62.4 %Snohomish County62.4Pierce County: 61.7 %Pierce County61.7Whatcom County: 61.5 %Whatcom County61.5Spokane County: 60.4 %Spokane County60.4Clark County: 60.3 %Clark County60.3Kitsap County: 60.1 %Kitsap County60.1Thurston County: 59.6 %Thurston County59.6Skamania County: 58.9 %Skamania County58.9Franklin County: 58.8 %Franklin County58.8Walla Walla County: 58.3 %Walla Walla County58.3Benton County: 57.9 %Benton County57.9Douglas County: 57.1 %Douglas County57.1Cowlitz County: 57 %Cowlitz County57Yakima County: 56.8 %Yakima County56.8Grant County: 56.7 %Grant County56.7Chelan County: 56.5 %Chelan County56.5Grays Harbor County: 56.4 %Grays Harbor County56.4Klickitat County: 56.3 %Klickitat County56.3Mason County: 56.1 %Mason County56.1Lewis County: 55.9 %Lewis County55.9Skagit County: 55.4 %Skagit County55.4Island County: 54.6 %Island County54.6Asotin County: 54.6 %Asotin County54.6Adams County: 54.4 %Adams County54.4Columbia County: 54.2 %Columbia County54.2Okanogan County: 53.6 %Okanogan County53.6Stevens County: 53 %Stevens County53Pend Oreille County: 52 %Pend Oreille County52Lincoln County: 51.6 %Lincoln County51.6Ferry County: 51.3 %Ferry County51.3Wahkiakum County: 51.3 %Wahkiakum County51.3Pacific County: 51.1 %Pacific County51.1San Juan County: 50.5 %San Juan County50.5Clallam County: 50.5 %Clallam County50.5Garfield County: 49.9 %Garfield County49.9Jefferson County: 46.7 %Jefferson County46.7
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2022 (%)Change on 2021
1Whitman County71.4+2.3 pts
2King County66.1+0.1 pts
3Kittitas County63.6+0.8 pts
4Snohomish County62.4-0.2 pts
5Pierce County61.7-0.2 pts
6Whatcom County61.5+0.3 pts
7Spokane County60.4-0.2 pts
8Clark County60.3-0 pts
9Kitsap County60.1-0.4 pts
10Thurston County59.6-0.2 pts
11Skamania County58.9-0.4 pts
12Franklin County58.8+0.2 pts
13Walla Walla County58.3-0.2 pts
14Benton County57.9-0.1 pts
15Douglas County57.10 pts
16Cowlitz County57-0.3 pts
17Yakima County56.80 pts
18Grant County56.7-0 pts
19Chelan County56.5-0.3 pts
20Grays Harbor County56.4-0.5 pts
21Klickitat County56.3-0.1 pts
22Mason County56.1-0.4 pts
23Lewis County55.9-0.2 pts
24Skagit County55.4-0.4 pts
25Island County54.6-0.6 pts
26Asotin County54.6-0.2 pts
27Adams County54.4+0.1 pts
28Columbia County54.2-0.2 pts
29Okanogan County53.6-0.1 pts
30Stevens County53-0.3 pts
31Pend Oreille County52-0.5 pts
32Lincoln County51.6-0.2 pts
33Ferry County51.30 pts
34Wahkiakum County51.3-0.5 pts
35Pacific County51.1-0.3 pts
36San Juan County50.5-0.8 pts
37Clallam County50.5-0.8 pts
38Garfield County49.9-0.6 pts
39Jefferson County46.7-1.1 pts

Other periods

About this ranking

Residents aged 18 to 64 as a percentage of total population on 1 July. United States: Census Bureau county population estimates by age; states and the nation are sums of their counties.

Not comparable with working-age shares for ages 15 to 64 used in EU and World Bank statistics.

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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties (Counties in Washington by population aged 18 to 64, 2022) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in Washington by population aged 18 to 64, 2022. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/population-18-64/washington-counties?period=2022. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Counties in Washington by population aged 18 to 64, 2022. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/population-18-64/washington-counties?period=2022.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in Washington by population aged 18 to 64, 2022 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-18-64/washington-counties?period=2022 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_washington_by_2022,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in Washington by population aged 18 to 64, 2022}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/population-18-64/washington-counties?period=2022. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in Washington by population aged 18 to 64, 2022
PY  - 2026
DA  - 2026/06/25
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/population-18-64/washington-counties?period=2022
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/washington-counties?period=2022.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest population aged 18 to 64?

Whitman County, with 71.4% in 2022, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Jefferson County, with 46.7% 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, Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Retrieved 2026-10-12.

Population aged 18 to 64: other rankings

Counties in Washington: more rankings