County Maps US

Monroe County, Indiana

A county in Indiana, ranked 12 of 92 by population.

CountyFIPS 18105

Within Indiana
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 Bloomington, the county seat, located via the 2025 Census Gazetteer.

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Population
143,345
+2,716 (+1.9%) since 2020
Land area
394.5
square miles. A further 4.1% of the total area is water
Population density
363
people per square mile, computed rather than published
County seat
Bloomington
Seat of county government.
Established
1818
207 years ago
Largest city
Bloomington city
Population 83,307.

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, Indiana 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 645 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 Monroe County ranks

Position among the 92 counties of Indiana, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn IndianaNationally
Population143,34512th of 92477th of 3,144
Land area394.5 sq mi49th of 922,552nd of 3,144
Population density363 per sq mi13th of 92377th of 3,144
Median household income$65,86859th of 921,557th 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
Population143,345Vintage 2025 Population Estimates
Population in 2020140,629Vintage 2025 Population Estimates
2020 estimates base?140,769Vintage 2025 Population Estimates
Land area394.5 sq mi2025 Gazetteer Files
Water area16.8 sq mi2025 Gazetteer Files
Total area411.3 sq mi2025 Gazetteer Files
Population density?363 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$65,868American Community Survey 2020-2024 5-Year Estimates
Median home value$285,200American Community Survey 2020-2024 5-Year Estimates
Median age31.2American Community Survey 2020-2024 5-Year Estimates
Households59,236American Community Survey 2020-2024 5-Year Estimates
Housing units65,657American 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
-156
999 births, 1,155 deaths
Net migration
+656
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 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
Brown CountyIndiana23 mi15,777
Lawrence CountyIndiana20 mi45,568
Owen CountyIndiana17 mi21,886
Morgan CountyIndiana14 mi74,967
Greene CountyIndiana12 mi31,165
Jackson CountyIndiana4.0 mi47,370

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

All 92 counties of Indiana

Open the interactive Indiana county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.