County Maps US

Monroe County, Wisconsin

A county in Wisconsin, ranked 30 of 72 by population.

CountyFIPS 55081

Within Wisconsin
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 Sparta, the county seat, located via the 2025 Census Gazetteer.

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Population
46,572
+265 (+0.6%) since 2020
Land area
900.9
square miles. A further 0.8% of the total area is water
Population density
51.7
people per square mile, computed rather than published
County seat
Sparta
Seat of county government.
Established
1854
171 years ago
Largest city
Sparta city
Population 9,974.

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, Wisconsin 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 735 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 72 counties of Wisconsin, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn WisconsinNationally
Population46,57230th of 721,061st of 3,144
Land area900.9 sq mi19th of 72847th of 3,144
Population density51.7 per sq mi36th of 721,437th of 3,144
Median household income$69,46741st of 721,237th 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
Population46,572Vintage 2025 Population Estimates
Population in 202046,307Vintage 2025 Population Estimates
2020 estimates base?46,276Vintage 2025 Population Estimates
Land area900.9 sq mi2025 Gazetteer Files
Water area7.2 sq mi2025 Gazetteer Files
Total area908.1 sq mi2025 Gazetteer Files
Population density?51.7 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$69,467American Community Survey 2020-2024 5-Year Estimates
Median home value$210,000American Community Survey 2020-2024 5-Year Estimates
Median age39.7American Community Survey 2020-2024 5-Year Estimates
Households18,301American Community Survey 2020-2024 5-Year Estimates
Housing units20,022American 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
+72
559 births, 487 deaths
Net migration
-7
More people moved out than moved in.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 4 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
Jackson CountyWisconsin39 mi20,999
Vernon CountyWisconsin30 mi31,443
Juneau CountyWisconsin29 mi26,649
La Crosse CountyWisconsin27 mi121,339

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

All 72 counties of Wisconsin

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

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