County Maps US

Washington County, Kansas

A county in Kansas, ranked 62 of 105 by population.

CountyFIPS 20201

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

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Population
5,533
-11 (-0.2%) since 2020
Land area
894.8
square miles. A further 0.4% of the total area is water
Population density
6.2
people per square mile, computed rather than published
County seat
Washington
Seat of county government.
Established
1873
152 years ago
Largest city
Washington city
Population 1,063.

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 Washington 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 Washington County, Kansas 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 796 by 800 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 Washington County ranks

Position among the 105 counties of Kansas, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn KansasNationally
Population5,53362nd of 1052,775th of 3,144
Land area894.8 sq mi30th of 105876th of 3,144
Population density6.2 per sq mi67th of 1052,720th of 3,144
Median household income$65,48247th of 1051,594th of 3,143

Full data for Washington County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population5,533Vintage 2025 Population Estimates
Population in 20205,544Vintage 2025 Population Estimates
2020 estimates base?5,544Vintage 2025 Population Estimates
Land area894.8 sq mi2025 Gazetteer Files
Water area3.9 sq mi2025 Gazetteer Files
Total area898.7 sq mi2025 Gazetteer Files
Population density?6.2 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$65,482American Community Survey 2020-2024 5-Year Estimates
Median home value$117,100American Community Survey 2020-2024 5-Year Estimates
Median age43.4American Community Survey 2020-2024 5-Year Estimates
Households2,373American Community Survey 2020-2024 5-Year Estimates
Housing units2,714American 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
+2
63 births, 61 deaths
Net migration
-30
More people moved out than moved in.

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

The 8 areas bordering Washington 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
Marshall CountyKansas30 mi9,852
Jefferson CountyNebraska24 mi7,070
Republic CountyKansas24 mi4,640
Clay CountyKansas22 mi7,990
Riley CountyKansas8.1 mi72,598
Cloud CountyKansas6.0 mi8,833
Gage CountyNebraska5.9 mi21,711
Thayer CountyNebraskaa single point4,842

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

All 105 counties of Kansas

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

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