County Maps US

Barton County, Missouri

A county in Missouri, ranked 78 of 115 by population.

CountyFIPS 29011

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

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Population
11,795
+171 (+1.5%) since 2020
Land area
592
square miles. A further 0.8% of the total area is water
Population density
19.9
people per square mile, computed rather than published
County seat
Lamar
Seat of county government.
Established
1855
170 years ago
Largest city
Lamar city
Population 4,337.

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 Barton 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 Barton County, Missouri 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 589 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 Barton County ranks

Position among the 115 counties of Missouri, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn MissouriNationally
Population11,79578th of 1152,297th of 3,144
Land area592 sq mi58th of 1151,655th of 3,144
Population density19.9 per sq mi80th of 1152,248th of 3,144
Median household income$51,63596th of 1152,683rd of 3,143

Full data for Barton County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population11,795Vintage 2025 Population Estimates
Population in 202011,624Vintage 2025 Population Estimates
2020 estimates base?11,641Vintage 2025 Population Estimates
Land area592 sq mi2025 Gazetteer Files
Water area4.7 sq mi2025 Gazetteer Files
Total area596.7 sq mi2025 Gazetteer Files
Population density?19.9 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$51,635American Community Survey 2020-2024 5-Year Estimates
Median home value$136,500American Community Survey 2020-2024 5-Year Estimates
Median age41.1American Community Survey 2020-2024 5-Year Estimates
Households4,454American Community Survey 2020-2024 5-Year Estimates
Housing units5,285American 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
+11
164 births, 153 deaths
Net migration
+33
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 Barton 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
Vernon CountyMissouri30 mi19,946
Jasper CountyMissouri30 mi127,428
Crawford CountyKansas20 mi39,008
Dade CountyMissouri16 mi7,804
Cedar CountyMissouri4.0 mi14,888

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

All 115 counties of Missouri

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

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