County Maps US

Calhoun County, Iowa

A county in Iowa, ranked 76 of 99 by population.

CountyFIPS 19025

Within Iowa
Calhoun County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data.

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Population
9,562
-333 (-3.4%) since 2020
Land area
569.8
square miles. A further 0.4% of the total area is water
Population density
16.8
people per square mile, computed rather than published
County seat
Rockwell City
Seat of county government.
Established
1851
174 years ago
Largest city
Rockwell City city
Population 2,133.

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 Calhoun 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 Calhoun 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 742 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 Calhoun 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
Population9,56276th of 992,443rd of 3,144
Land area569.8 sq mi48th of 991,778th of 3,144
Population density16.8 per sq mi82nd of 992,339th of 3,144
Median household income$64,96478th of 991,635th of 3,143

Full data for Calhoun County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population9,562Vintage 2025 Population Estimates
Population in 20209,895Vintage 2025 Population Estimates
2020 estimates base?9,927Vintage 2025 Population Estimates
Land area569.8 sq mi2025 Gazetteer Files
Water area2.3 sq mi2025 Gazetteer Files
Total area572.1 sq mi2025 Gazetteer Files
Population density?16.8 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$64,964American Community Survey 2020-2024 5-Year Estimates
Median home value$118,800American Community Survey 2020-2024 5-Year Estimates
Median age42.8American Community Survey 2020-2024 5-Year Estimates
Households3,993American Community Survey 2020-2024 5-Year Estimates
Housing units4,798American 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
-72
89 births, 161 deaths
Net migration
-20
More people moved out than moved in.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 6 areas bordering Calhoun 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
Sac CountyIowa27 mi9,525
Webster CountyIowa26 mi36,838
Pocahontas CountyIowa24 mi6,819
Greene CountyIowa12 mi8,658
Carroll CountyIowa12 mi20,303
Buena Vista CountyIowaa single point20,449

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.