County Maps US

Pottawatomie County, Kansas

A county in Kansas, ranked 22 of 105 by population.

CountyFIPS 20149

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

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Population
27,186
+1,764 (+6.9%) since 2020
Land area
840.7
square miles. A further 2.4% of the total area is water
Population density
32.3
people per square mile, computed rather than published
County seat
Westmoreland
Seat of county government.
Established
1857
168 years ago
Largest city
Wamego city
Population 4,912 for the whole place, which extends beyond this county.

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 Pottawatomie 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 Pottawatomie 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 672 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 Pottawatomie 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
Population27,18622nd of 1051,538th of 3,144
Land area840.7 sq mi44th of 105993rd of 3,144
Population density32.3 per sq mi23rd of 1051,858th of 3,144
Median household income$92,3252nd of 105262nd of 3,143

Full data for Pottawatomie County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population27,186Vintage 2025 Population Estimates
Population in 202025,422Vintage 2025 Population Estimates
2020 estimates base?25,353Vintage 2025 Population Estimates
Land area840.7 sq mi2025 Gazetteer Files
Water area20.9 sq mi2025 Gazetteer Files
Total area861.6 sq mi2025 Gazetteer Files
Population density?32.3 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$92,325American Community Survey 2020-2024 5-Year Estimates
Median home value$245,900American Community Survey 2020-2024 5-Year Estimates
Median age36.4American Community Survey 2020-2024 5-Year Estimates
Households9,381American Community Survey 2020-2024 5-Year Estimates
Housing units10,214American 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
+178
383 births, 205 deaths
Net migration
+151
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 6 areas bordering Pottawatomie 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
Riley CountyKansas65 mi72,598
Wabaunsee CountyKansas34 mi7,018
Jackson CountyKansas24 mi13,438
Marshall CountyKansas18 mi9,852
Nemaha CountyKansas11 mi10,054
Shawnee CountyKansas6.4 mi178,607

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.