County Maps US

Monroe County, Iowa

A county in Iowa, ranked 87 of 99 by population.

CountyFIPS 19135

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

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Population
7,406
-194 (-2.6%) since 2020
Land area
433.7
square miles. A further 0.1% of the total area is water
Population density
17.1
people per square mile, computed rather than published
County seat
Albia
Seat of county government.
Established
1843
182 years ago
Largest city
Albia city
Population 3,599.

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 Monroe 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 Monroe 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 627 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 Monroe 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
Population7,40687th of 992,625th of 3,144
Land area433.7 sq mi85th of 992,339th of 3,144
Population density17.1 per sq mi79th of 992,326th of 3,144
Median household income$70,99651st of 991,129th of 3,143

Full data for Monroe County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population7,406Vintage 2025 Population Estimates
Population in 20207,600Vintage 2025 Population Estimates
2020 estimates base?7,577Vintage 2025 Population Estimates
Land area433.7 sq mi2025 Gazetteer Files
Water area0.59 sq mi2025 Gazetteer Files
Total area434.3 sq mi2025 Gazetteer Files
Population density?17.1 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$70,996American Community Survey 2020-2024 5-Year Estimates
Median home value$156,300American Community Survey 2020-2024 5-Year Estimates
Median age41.8American Community Survey 2020-2024 5-Year Estimates
Households3,089American Community Survey 2020-2024 5-Year Estimates
Housing units3,656American 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
-43
83 births, 126 deaths
Net migration
+56
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 Monroe 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
Appanoose CountyIowa24 mi12,077
Wapello CountyIowa18 mi35,210
Lucas CountyIowa18 mi8,847
Marion CountyIowa12 mi34,192
Mahaska CountyIowa12 mi21,880
Davis CountyIowaa single point9,230
Wayne CountyIowaa single point6,738

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.