County Maps US

Buffalo County, Wisconsin

A county in Wisconsin, ranked 67 of 72 by population.

CountyFIPS 55011

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

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Population
13,318
-15 (-0.1%) since 2020
Land area
675.8
square miles. A further 4.8% of the total area is water
Population density
19.7
people per square mile, computed rather than published
County seat
Alma
Seat of county government.
Established
1853
172 years ago
Largest city
Mondovi city
Population 2,853.

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 Buffalo 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 Buffalo 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 582 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 Buffalo 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
Population13,31867th of 722,204th of 3,144
Land area675.8 sq mi42nd of 721,390th of 3,144
Population density19.7 per sq mi63rd of 722,257th of 3,144
Median household income$70,47940th of 721,163rd of 3,143

Full data for Buffalo County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population13,318Vintage 2025 Population Estimates
Population in 202013,333Vintage 2025 Population Estimates
2020 estimates base?13,323Vintage 2025 Population Estimates
Land area675.8 sq mi2025 Gazetteer Files
Water area33.8 sq mi2025 Gazetteer Files
Total area709.6 sq mi2025 Gazetteer Files
Population density?19.7 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$70,479American Community Survey 2020-2024 5-Year Estimates
Median home value$213,300American Community Survey 2020-2024 5-Year Estimates
Median age46.5American Community Survey 2020-2024 5-Year Estimates
Households5,720American Community Survey 2020-2024 5-Year Estimates
Housing units6,522American 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
-55
114 births, 169 deaths
Net migration
-26
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 5 areas bordering Buffalo 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
Trempealeau CountyWisconsin52 mi31,171
Pepin CountyWisconsin32 mi7,513
Wabasha CountyMinnesota21 mi21,537
Winona CountyMinnesota20 mi50,523
Eau Claire CountyWisconsin6.0 mi109,033

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.