County Maps US

Eau Claire County, Wisconsin

A county in Wisconsin, ranked 14 of 72 by population.

CountyFIPS 55035

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

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Population
109,033
+3,135 (+3.0%) since 2020
Land area
637.9
square miles. A further 1.1% of the total area is water
Population density
171
people per square mile, computed rather than published
County seat
Eau Claire
Seat of county government.
Established
1856
169 years ago
Largest city
Eau Claire city
Population 70,095 for the whole place, which extends beyond this county.

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 Eau Claire 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 Eau Claire 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 446 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 Eau Claire 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
Population109,03314th of 72582nd of 3,144
Land area637.9 sq mi44th of 721,491st of 3,144
Population density171 per sq mi15th of 72626th of 3,144
Median household income$74,54633rd of 72866th of 3,143

Full data for Eau Claire County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population109,033Vintage 2025 Population Estimates
Population in 2020105,898Vintage 2025 Population Estimates
2020 estimates base?105,706Vintage 2025 Population Estimates
Land area637.9 sq mi2025 Gazetteer Files
Water area7.3 sq mi2025 Gazetteer Files
Total area645.2 sq mi2025 Gazetteer Files
Population density?171 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$74,546American Community Survey 2020-2024 5-Year Estimates
Median home value$261,000American Community Survey 2020-2024 5-Year Estimates
Median age35.8American Community Survey 2020-2024 5-Year Estimates
Households44,726American Community Survey 2020-2024 5-Year Estimates
Housing units46,936American 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
+11
956 births, 945 deaths
Net migration
+400
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 Eau Claire 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
Chippewa CountyWisconsin36 mi67,614
Clark CountyWisconsin18 mi35,052
Trempealeau CountyWisconsin18 mi31,171
Jackson CountyWisconsin12 mi20,999
Dunn CountyWisconsin12 mi46,223
Pepin CountyWisconsin6.0 mi7,513
Buffalo CountyWisconsin6.0 mi13,318

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.