Counties in Washington by median age

Name: Counties in Washington by median age, 2023
Creator: U.S. Census Bureau
License: Public domain (US federal government work, citation requested)

Jefferson County had the highest median age of 39 counties in 2023, at 59.5 years. Whitman County had the lowest, at 26.1 years. The median was 41.9 years and the figure for Washington was 38.2 years. Source: the U.S. Census Bureau.

Highest59.5Jefferson County

Lowest26.1Whitman County

Median41.939 counties

Washington38.2History

All counties, 2023

CSV Chart (SVG)

years. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

Rank	Counties	2023 years	Change on 2022
1	Jefferson County	59.5	+0.1
2	San Juan County	56.7	+0.2
3	Pacific County	54.9	+0.2
4	Wahkiakum County	54.8	-1.5
5	Ferry County	52.8	+1
6	Garfield County	52.6	+2.7
7	Columbia County	52.1	+1.3
8	Clallam County	51.8	+0.6
9	Pend Oreille County	50	-0.4
10	Skamania County	48.6	+2
11	Klickitat County	47.5	+0.5
12	Lincoln County	46.9	+0.2
13	Stevens County	46.8	-0.1
14	Asotin County	45.5	+0.1
15	Mason County	44.8	-0.3
16	Grays Harbor County	44.7	+0.3
17	Island County	44.5	+0.3
18	Okanogan County	43.4	+0.5
19	Lewis County	42.4	0
20	Skagit County	41.9	+0.4
21	Cowlitz County	41.1	+0.3
22	Chelan County	40.4	+0.3
23	Kitsap County	39.9	+0.2
24	Thurston County	39.8	+0.3
25	Clark County	38.9	+0.1
26	Douglas County	38.4	+0.6
26	Snohomish County	38.4	+0.1
28	Walla Walla County	38.3	+0.3
29	Spokane County	38.2	+0.2
29	Whatcom County	38.2	+0.4
31	Kittitas County	37.9	+1.5
32	King County	37.3	+0.1
33	Pierce County	36.8	+0.3
34	Benton County	36.2	+0.1
35	Grant County	33.5	+0.3
36	Yakima County	33.2	+0.2
37	Franklin County	30.8	+0.2
38	Adams County	29.2	+0.2
39	Whitman County	26.1	+0.1

Other periods

2024
2023
2022
2021

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/2023/table-based-SF/data/5YRData/acsdt5y2023-b01002.dat. Retrieved 2026-10-08.

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Questions

Which county has the highest median age?

Jefferson County, with 59.5 years in 2023, according to the U.S. Census Bureau.

Which county has the lowest median age?

Whitman County, with 26.1 years in 2023.

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.