County Maps US

Clinton County, Missouri

A county in Missouri, ranked 53 of 115 by population.

CountyFIPS 29049

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

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Population
21,661
+447 (+2.1%) since 2020
Land area
418.9
square miles. A further 1.1% of the total area is water
Population density
51.7
people per square mile, computed rather than published
County seat
Plattsburg
Seat of county government.
Established
1833
192 years ago
Largest city
Cameron city
Population 5,119 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 Clinton 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 Clinton 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 771 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 Clinton 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
Population21,66153rd of 1151,738th of 3,144
Land area418.9 sq mi106th of 1152,418th of 3,144
Population density51.7 per sq mi36th of 1151,437th of 3,144
Median household income$70,62720th of 1151,151st of 3,143

Full data for Clinton County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population21,661Vintage 2025 Population Estimates
Population in 202021,214Vintage 2025 Population Estimates
2020 estimates base?21,183Vintage 2025 Population Estimates
Land area418.9 sq mi2025 Gazetteer Files
Water area4.5 sq mi2025 Gazetteer Files
Total area423.5 sq mi2025 Gazetteer Files
Population density?51.7 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$70,627American Community Survey 2020-2024 5-Year Estimates
Median home value$226,800American Community Survey 2020-2024 5-Year Estimates
Median age42.0American Community Survey 2020-2024 5-Year Estimates
Households8,329American Community Survey 2020-2024 5-Year Estimates
Housing units9,077American 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
-66
232 births, 298 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 6 areas bordering Clinton 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
DeKalb CountyMissouri21 mi9,795
Clay CountyMissouri21 mi265,032
Caldwell CountyMissouri15 mi9,012
Buchanan CountyMissouri15 mi83,540
Platte CountyMissouri5.1 mi114,400
Ray CountyMissouri5.0 mi23,398

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.