County Maps US

Sumner County, Kansas

A county in Kansas, ranked 25 of 105 by population.

CountyFIPS 20191

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

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Population
22,312
-29 (-0.1%) since 2020
Land area
1,182
square miles. A further 0.3% of the total area is water
Population density
18.9
people per square mile, computed rather than published
County seat
Wellington
Seat of county government.
Established
1873
152 years ago
Largest city
Wellington city
Population 7,541.

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 Sumner 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 Sumner 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 800 by 736 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 Sumner 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
Population22,31225th of 1051,712th of 3,144
Land area1,182 sq mi4th of 105518th of 3,144
Population density18.9 per sq mi37th of 1052,282nd of 3,144
Median household income$63,95154th of 1051,713th of 3,143

Full data for Sumner County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population22,312Vintage 2025 Population Estimates
Population in 202022,341Vintage 2025 Population Estimates
2020 estimates base?22,388Vintage 2025 Population Estimates
Land area1,182 sq mi2025 Gazetteer Files
Water area3.3 sq mi2025 Gazetteer Files
Total area1,185 sq mi2025 Gazetteer Files
Population density?18.9 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$63,951American Community Survey 2020-2024 5-Year Estimates
Median home value$135,100American Community Survey 2020-2024 5-Year Estimates
Median age41.3American Community Survey 2020-2024 5-Year Estimates
Households8,970American Community Survey 2020-2024 5-Year Estimates
Housing units10,414American 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
-41
240 births, 281 deaths
Net migration
-19
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 7 areas bordering Sumner 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
Sedgwick CountyKansas36 mi538,433
Cowley CountyKansas33 mi34,382
Harper CountyKansas27 mi5,370
Grant CountyOklahoma19 mi4,067
Kay CountyOklahoma17 mi43,490
Kingman CountyKansas6.1 mi7,029
Butler CountyKansasa single point69,484

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.