County Maps US

Clinton County, Iowa

A county in Iowa, ranked 12 of 99 by population.

CountyFIPS 19045

Within Iowa
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 Clinton, the county seat, located via the 2025 Census Gazetteer.

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Population
46,002
-429 (-0.9%) since 2020
Land area
695
square miles. A further 2.1% of the total area is water
Population density
66.2
people per square mile, computed rather than published
County seat
Clinton
Seat of county government.
Established
1837
188 years ago
Largest city
Clinton city
Population 24,049.

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, Iowa 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 472 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 99 counties of Iowa, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn IowaNationally
Population46,00212th of 991,073rd of 3,144
Land area695 sq mi15th of 991,343rd of 3,144
Population density66.2 per sq mi17th of 991,225th of 3,144
Median household income$66,98174th of 991,436th 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
Population46,002Vintage 2025 Population Estimates
Population in 202046,431Vintage 2025 Population Estimates
2020 estimates base?46,465Vintage 2025 Population Estimates
Land area695 sq mi2025 Gazetteer Files
Water area15.2 sq mi2025 Gazetteer Files
Total area710.2 sq mi2025 Gazetteer Files
Population density?66.2 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$66,981American Community Survey 2020-2024 5-Year Estimates
Median home value$160,600American Community Survey 2020-2024 5-Year Estimates
Median age42.4American Community Survey 2020-2024 5-Year Estimates
Households19,506American Community Survey 2020-2024 5-Year Estimates
Housing units21,581American 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
-115
502 births, 617 deaths
Net migration
+116
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 7 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
Scott CountyIowa46 mi175,259
Jackson CountyIowa38 mi19,288
Whiteside CountyIllinois12 mi54,121
Cedar CountyIowa12 mi18,359
Carroll CountyIllinois7.9 mi15,419
Jones CountyIowa6.0 mi21,253
Rock Island CountyIllinois5.6 mi141,869

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

All 99 counties of Iowa

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

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