County Maps US

Wahkiakum County, Washington

A county in Washington, ranked 37 of 39 by population.

CountyFIPS 53069

Within Washington
Wahkiakum County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Cathlamet, the county seat, located via the 2025 Census Gazetteer.

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Population
4,873
+427 (+9.6%) since 2020
Land area
262.9
square miles. A further 8.3% of the total area is water
Population density
18.5
people per square mile, computed rather than published
County seat
Cathlamet
Seat of county government.
Established
1854
171 years ago
Largest city
Cathlamet town
Population 610.

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Wahkiakum County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Wahkiakum County, Washington from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 800 by 569 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Wahkiakum County ranks

Position among the 39 counties of Washington, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn WashingtonNationally
Population4,87337th of 392,824th of 3,144
Land area262.9 sq mi37th of 392,880th of 3,144
Population density18.5 per sq mi30th of 392,289th of 3,144
Median household income$62,65337th of 391,833rd of 3,143

Full data for Wahkiakum County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population4,873Vintage 2025 Population Estimates
Population in 20204,446Vintage 2025 Population Estimates
2020 estimates base?4,420Vintage 2025 Population Estimates
Land area262.9 sq mi2025 Gazetteer Files
Water area23.8 sq mi2025 Gazetteer Files
Total area286.7 sq mi2025 Gazetteer Files
Population density?18.5 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$62,653American Community Survey 2020-2024 5-Year Estimates
Median home value$396,800American Community Survey 2020-2024 5-Year Estimates
Median age54.5American Community Survey 2020-2024 5-Year Estimates
Households2,100American Community Survey 2020-2024 5-Year Estimates
Housing units2,250American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
-24
40 births, 64 deaths
Net migration
+85
More people moved in than moved out.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 5 areas bordering Wahkiakum County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering areaStateShared borderPopulation
Pacific CountyWashington26 mi24,357
Clatsop CountyOregon24 mi40,926
Cowlitz CountyWashington15 mi114,885
Columbia CountyOregon7.9 mi54,091
Lewis CountyWashington6.7 mi88,062

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

All 39 counties of Washington

Open the interactive Washington county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.