County Maps US

Oconto County, Wisconsin

A county in Wisconsin, ranked 38 of 72 by population.

CountyFIPS 55083

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

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Population
40,195
+1,118 (+2.9%) since 2020
Land area
997.5
square miles. A further 13.2% of the total area is water
Population density
40.3
people per square mile, computed rather than published
County seat
Oconto
Seat of county government.
Established
1851
174 years ago
Largest city
Oconto city
Population 4,640.

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 Oconto 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 Oconto 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 743 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 Oconto 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
Population40,19538th of 721,187th of 3,144
Land area997.5 sq mi14th of 72685th of 3,144
Population density40.3 per sq mi41st of 721,668th of 3,144
Median household income$75,04928th of 72836th of 3,143

Full data for Oconto County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population40,195Vintage 2025 Population Estimates
Population in 202039,077Vintage 2025 Population Estimates
2020 estimates base?38,967Vintage 2025 Population Estimates
Land area997.5 sq mi2025 Gazetteer Files
Water area151.4 sq mi2025 Gazetteer Files
Total area1,149 sq mi2025 Gazetteer Files
Population density?40.3 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$75,049American Community Survey 2020-2024 5-Year Estimates
Median home value$231,400American Community Survey 2020-2024 5-Year Estimates
Median age47.5American Community Survey 2020-2024 5-Year Estimates
Households16,811American Community Survey 2020-2024 5-Year Estimates
Housing units24,072American 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
-116
339 births, 455 deaths
Net migration
+308
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 Oconto 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
Marinette CountyWisconsin75 mi42,574
Menominee CountyWisconsin26 mi4,199
Brown CountyWisconsin24 mi275,803
Shawano CountyWisconsin24 mi41,560
Langlade CountyWisconsin20 mi19,534
Forest CountyWisconsin12 mi9,574
Door CountyWisconsin6.0 mi30,616

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.