County Maps US

Butler County, Iowa

A county in Iowa, ranked 57 of 99 by population.

CountyFIPS 19023

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

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Population
14,049
-288 (-2.0%) since 2020
Land area
580.1
square miles. A further 0.3% of the total area is water
Population density
24.2
people per square mile, computed rather than published
County seat
Allison
Seat of county government.
Established
1851
174 years ago
Largest city
Parkersburg city
Population 1,969.

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 Butler 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 Butler 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 791 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 Butler 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
Population14,04957th of 992,162nd of 3,144
Land area580.1 sq mi30th of 991,700th of 3,144
Population density24.2 per sq mi56th of 992,086th of 3,144
Median household income$73,71532nd of 99936th of 3,143

Full data for Butler County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population14,049Vintage 2025 Population Estimates
Population in 202014,337Vintage 2025 Population Estimates
2020 estimates base?14,338Vintage 2025 Population Estimates
Land area580.1 sq mi2025 Gazetteer Files
Water area1.6 sq mi2025 Gazetteer Files
Total area581.8 sq mi2025 Gazetteer Files
Population density?24.2 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$73,715American Community Survey 2020-2024 5-Year Estimates
Median home value$165,400American Community Survey 2020-2024 5-Year Estimates
Median age43.7American Community Survey 2020-2024 5-Year Estimates
Households5,863American Community Survey 2020-2024 5-Year Estimates
Housing units6,570American 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
-52
141 births, 193 deaths
Net migration
+8
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 8 areas bordering Butler 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
Franklin CountyIowa24 mi9,868
Grundy CountyIowa24 mi12,361
Floyd CountyIowa24 mi14,901
Bremer CountyIowa18 mi25,296
Black Hawk CountyIowa6.0 mi131,532
Cerro Gordo CountyIowaa single point42,372
Chickasaw CountyIowaa single point11,663
Hardin CountyIowaa single point16,455

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.