Counties in Washington by share of population aged 65 and over, 2025

Name: Counties in Washington by share of population aged 65 and over, 2025
Creator: U.S. Census Bureau
License: Public domain (US federal government work, citation requested)

Jefferson County had the highest share of population aged 65 and over of 39 counties in 2025, at 44.2%. Franklin County had the lowest, at 11.3%. The median was 22.8% and the figure for Washington was 18.3%. Source: the U.S. Census Bureau.

Highest44.2Jefferson County

Lowest11.3Franklin County

Median22.839 counties

Washington18.3History

All counties, 2025

CSV Chart (SVG)

%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

Rank	Counties	2025 (%)	Change on 2024
1	Jefferson County	44.2	+0.6 pts
2	San Juan County	38.6	+0.8 pts
3	Clallam County	35.2	+0.5 pts
4	Pacific County	34.6	+0.4 pts
5	Wahkiakum County	34.1	+0.4 pts
6	Columbia County	31.1	+0.3 pts
7	Island County	30.4	+0.8 pts
8	Ferry County	30	+0.1 pts
9	Pend Oreille County	29.3	+0.2 pts
10	Lincoln County	28.5	+0.2 pts
11	Garfield County	28.3	+0.7 pts
12	Stevens County	27.8	+0.5 pts
13	Asotin County	27.3	+0.6 pts
14	Klickitat County	26.4	+0.5 pts
15	Skamania County	26	+0.9 pts
16	Mason County	25.8	+0.2 pts
17	Grays Harbor County	25.5	+0.6 pts
18	Okanogan County	25.2	+0.3 pts
19	Skagit County	25	+0.4 pts
20	Lewis County	22.8	+0.2 pts
21	Chelan County	22.7	+0.4 pts
22	Walla Walla County	22.1	+0.2 pts
23	Kitsap County	21.9	+0.5 pts
24	Cowlitz County	21.4	+0.2 pts
25	Whatcom County	20.9	+0.4 pts
26	Thurston County	20.6	+0.4 pts
27	Kittitas County	20.4	+0.4 pts
28	Douglas County	20	+0.2 pts
29	Spokane County	19.4	+0.4 pts
30	Clark County	18.5	+0.3 pts
31	Benton County	17.3	+0.3 pts
32	Pierce County	16.7	+0.4 pts
33	Snohomish County	16.4	+0.3 pts
34	Yakima County	15.9	+0.3 pts
35	Grant County	15.8	+0.2 pts
36	King County	15.2	+0.2 pts
37	Whitman County	13.4	+0.2 pts
38	Adams County	12.2	+0.1 pts
39	Franklin County	11.3	+0.2 pts

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.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

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}
GET https://invokely.ai/api/v1/rank?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 44.2% in 2025, according to the U.S. Census Bureau.

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

Franklin County, with 11.3% in 2025.

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.