County Maps US

Benton County, Iowa

A county in Iowa, ranked 24 of 99 by population.

CountyFIPS 19011

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

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Population
26,004
+452 (+1.8%) since 2020
Land area
716.1
square miles. A further 0.3% of the total area is water
Population density
36.3
people per square mile, computed rather than published
County seat
Vinton
Seat of county government.
Established
1837
188 years ago
Largest city
Vinton city
Population 5,004.

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 Benton 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 Benton 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 653 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 Benton 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
Population26,00424th of 991,585th of 3,144
Land area716.1 sq mi11th of 991,265th of 3,144
Population density36.3 per sq mi31st of 991,764th of 3,144
Median household income$86,9626th of 99373rd of 3,143

Full data for Benton County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population26,004Vintage 2025 Population Estimates
Population in 202025,552Vintage 2025 Population Estimates
2020 estimates base?25,586Vintage 2025 Population Estimates
Land area716.1 sq mi2025 Gazetteer Files
Water area2.3 sq mi2025 Gazetteer Files
Total area718.4 sq mi2025 Gazetteer Files
Population density?36.3 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$86,962American Community Survey 2020-2024 5-Year Estimates
Median home value$208,200American Community Survey 2020-2024 5-Year Estimates
Median age43.1American Community Survey 2020-2024 5-Year Estimates
Households10,202American Community Survey 2020-2024 5-Year Estimates
Housing units11,114American 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
+31
289 births, 258 deaths
Net migration
+130
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 Benton 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
Linn CountyIowa30 mi232,028
Tama CountyIowa30 mi16,796
Iowa CountyIowa24 mi16,504
Black Hawk CountyIowa12 mi131,532
Buchanan CountyIowa12 mi20,883
Johnson CountyIowaa single point160,044
Poweshiek CountyIowaa single point18,368

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.