County Maps US

Leavenworth County, Kansas

A county in Kansas, ranked 6 of 105 by population.

CountyFIPS 20103

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

Download SVGFull Kansas map downloads

Population
84,590
+2,616 (+3.2%) since 2020
Land area
463.4
square miles. A further 1.2% of the total area is water
Population density
183
people per square mile, computed rather than published
County seat
Leavenworth
Seat of county government.
Established
1855
170 years ago
Largest city
Leavenworth city
Population 37,012.

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 Leavenworth 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 Leavenworth 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 576 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 Leavenworth 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
Population84,5906th of 105695th of 3,144
Land area463.4 sq mi100th of 1052,218th of 3,144
Population density183 per sq mi6th of 105599th of 3,144
Median household income$89,2183rd of 105320th of 3,143

Full data for Leavenworth County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population84,590Vintage 2025 Population Estimates
Population in 202081,974Vintage 2025 Population Estimates
2020 estimates base?81,909Vintage 2025 Population Estimates
Land area463.4 sq mi2025 Gazetteer Files
Water area5.5 sq mi2025 Gazetteer Files
Total area468.9 sq mi2025 Gazetteer Files
Population density?183 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$89,218American Community Survey 2020-2024 5-Year Estimates
Median home value$282,900American Community Survey 2020-2024 5-Year Estimates
Median age38.0American Community Survey 2020-2024 5-Year Estimates
Households30,164American Community Survey 2020-2024 5-Year Estimates
Housing units31,865American 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
+176
874 births, 698 deaths
Net migration
+64
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 Leavenworth 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
Jefferson CountyKansas26 mi18,296
Platte CountyMissouri25 mi114,400
Wyandotte CountyKansas22 mi170,597
Douglas CountyKansas17 mi120,920
Johnson CountyKansas12 mi636,906
Atchison CountyKansas11 mi16,172

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.