County Maps US

Warren County, Iowa

A county in Iowa, ranked 11 of 99 by population.

CountyFIPS 19181

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

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Population
57,331
+4,734 (+9.0%) since 2020
Land area
569.7
square miles. A further 0.6% of the total area is water
Population density
101
people per square mile, computed rather than published
County seat
Indianola
Seat of county government.
Established
1846
179 years ago
Largest city
Indianola city
Population 16,829.

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 Warren 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 Warren 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 792 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 Warren 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
Population57,33111th of 99926th of 3,144
Land area569.7 sq mi49th of 991,781st of 3,144
Population density101 per sq mi10th of 99900th of 3,144
Median household income$94,5882nd of 99228th of 3,143

Full data for Warren County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population57,331Vintage 2025 Population Estimates
Population in 202052,597Vintage 2025 Population Estimates
2020 estimates base?52,401Vintage 2025 Population Estimates
Land area569.7 sq mi2025 Gazetteer Files
Water area3.3 sq mi2025 Gazetteer Files
Total area573 sq mi2025 Gazetteer Files
Population density?101 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$94,588American Community Survey 2020-2024 5-Year Estimates
Median home value$269,600American Community Survey 2020-2024 5-Year Estimates
Median age38.8American Community Survey 2020-2024 5-Year Estimates
Households20,679American Community Survey 2020-2024 5-Year Estimates
Housing units21,921American 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
+104
627 births, 523 deaths
Net migration
+733
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 Warren 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
Polk CountyIowa30 mi516,546
Madison CountyIowa24 mi17,270
Marion CountyIowa23 mi34,192
Clarke CountyIowa12 mi9,574
Lucas CountyIowa12 mi8,847
Dallas CountyIowaa single point118,457

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.