County Maps US

Linn County, Iowa

A county in Iowa, ranked 2 of 99 by population.

CountyFIPS 19113

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

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Population
232,028
+1,623 (+0.7%) since 2020
Land area
717
square miles. A further 1.1% of the total area is water
Population density
324
people per square mile, computed rather than published
County seat
Cedar Rapids
Seat of county government.
Established
1839
186 years ago
Largest city
Cedar Rapids city
Population 137,935.

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 Linn 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 Linn 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 655 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 Linn 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
Population232,0282nd of 99312th of 3,144
Land area717 sq mi10th of 991,260th of 3,144
Population density324 per sq mi3rd of 99410th of 3,144
Median household income$77,64920th of 99688th of 3,143

Full data for Linn County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population232,028Vintage 2025 Population Estimates
Population in 2020230,405Vintage 2025 Population Estimates
2020 estimates base?230,291Vintage 2025 Population Estimates
Land area717 sq mi2025 Gazetteer Files
Water area7.7 sq mi2025 Gazetteer Files
Total area724.7 sq mi2025 Gazetteer Files
Population density?324 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$77,649American Community Survey 2020-2024 5-Year Estimates
Median home value$214,300American Community Survey 2020-2024 5-Year Estimates
Median age39.0American Community Survey 2020-2024 5-Year Estimates
Households95,600American Community Survey 2020-2024 5-Year Estimates
Housing units103,104American 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
+433
2,641 births, 2,208 deaths
Net migration
+1,188
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 Linn 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
Benton CountyIowa30 mi26,004
Jones CountyIowa24 mi21,253
Johnson CountyIowa24 mi160,044
Buchanan CountyIowa12 mi20,883
Delaware CountyIowa12 mi17,674
Cedar CountyIowa6.0 mi18,359
Iowa CountyIowaa single point16,504

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.