• county
  • FIPS 55039
  • Largest town: Fond du Lac

Fond du Lac County, Wisconsin

Fond du Lac County had 104,269 residents in the Census Vintage 2024 estimate, on 719.6 square miles of land. It ranks 16th of 72 in Wisconsin by population and 40th by land area.

Population
104,269
#16 of 72 in Wisconsin · #601 in US
Area
719.6 sq mi
#40 of 72 in Wisconsin · #1,247 in US
Density
145 / sq mi
#18 of 72 in Wisconsin · #713 in US
Median household income
$73,485
#26 of 72 in Wisconsin · #757 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Fond du Lac County within Wisconsin. Pin: Madison.

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Fond du Lac County population, land area and income

Fond du Lac County had 104,269 residents in the Census Vintage 2024 estimate, on 719.6 square miles of land. It ranks 16th of 72 in Wisconsin by population and 40th by land area. That works out to 144.9 people per square mile, 1.5 times the US average of 96.3, and in the top quarter nationally.

The median county-equivalent in Wisconsin has 41,821 residents, so Fond du Lac County is 2.5 times that size.

Its SAIPE 2023 median household income of $73,485 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

104,269

3144th1st

601st of 3,144 (US)

Land area

720 sq mi

3144th1st

1247th of 3,144 (US)

Density

144.9 / sq mi

3144th1st

713th of 3,144 (US)

Median household income

$73,485

3143rd1st

757th of 3,143 (US)

Rank within Wisconsin (72)

Population

104,269

72nd1st

16th of 72 (WI)

Land area

720 sq mi

72nd1st

40th of 72 (WI)

Density

144.9 / sq mi

72nd1st

18th of 72 (WI)

Median household income

$73,485

72nd1st

26th of 72 (WI)

How Fond du Lac County's population changed since 2020

Fond du Lac County gained 113 residents between the July 2020 and July 2024 estimates, a rise of 0.1%. That ranks 57th of 72 in Wisconsin for growth. The median Wisconsin county changed by +1.0%, and the state as a whole by +1.1%.

Since the April 2020 estimates base, Fond du Lac County recorded 4,230 births and 4,953 deaths, a natural change of -723. Net international migration added +1,001 and net domestic migration, people moving to or from other US counties, came to -184. The largest single component was international migration, which added 1,001 people.

104.2k2020104.1k2021104.0k2022104.1k2023104.3k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
4,230
Deaths
4,953
Net international migration
+1,001
Net domestic migration
-184
Change, July 2023 to July 2024
+134

Where Fond du Lac County is

The Census internal point of Fond du Lac County is at 43.754700, -88.493300. It sits in UTM zone 16N. The map shades Wisconsin's 72 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Fond du Lac County outlined. Dots are towns of 1,000+ people with residents in it.

Barron County: +0.2%Green County: +0.4%Dunn County: +1.5%Jefferson County: +0.0%Lincoln County: +0.1%Rusk County: -0.1%Fond du Lac County: +0.1%Marquette County: +1.0%Outagamie County: +2.3%Waupaca County: -1.2%Oneida County: +0.8%Eau Claire County: +2.8%Washington County: +1.4%Portage County: +2.3%Menominee County: +0.7%Clark County: +0.5%Monroe County: +0.2%Milwaukee County: -1.5%Buffalo County: +1.1%Lafayette County: +4.2%Ozaukee County: +2.5%Rock County: +1.0%Sheboygan County: +0.2%Green Lake County: +1.8%Waukesha County: +2.3%Calumet County: +2.1%Dodge County: -0.8%Wood County: -0.3%Winnebago County: +0.9%Sawyer County: +4.0%Dane County: +4.6%Sauk County: +1.1%Pepin County: +2.9%Adams County: +3.2%Price County: +0.4%Taylor County: +1.1%Grant County: +0.7%Trempealeau County: -0.0%Vernon County: +2.1%Waushara County: +2.2%Iowa County: +1.0%Crawford County: -0.5%Kenosha County: -0.3%Shawano County: +1.1%Juneau County: -0.7%Jackson County: -0.3%Vilas County: +3.7%Bayfield County: +3.7%Chippewa County: +1.5%Iron County: +1.5%Racine County: +0.3%Door County: +1.3%Ashland County: +1.1%Kewaunee County: +0.9%Polk County: +1.8%Florence County: +2.4%Douglas County: -0.2%Forest County: +3.7%Columbia County: -0.7%Walworth County: +0.7%La Crosse County: +0.1%Manitowoc County: +0.1%Oconto County: +2.5%Langlade County: +0.4%Marathon County: +0.7%Washburn County: +2.2%Brown County: +1.8%Richland County: -0.9%Marinette County: +1.1%St. Croix County: +4.3%Pierce County: +2.7%Burnett County: +3.7%
Change 2020 to 2024
  1. < +0.1%
  2. < +0.7%
  3. < +1.3%
  4. < +2.3%
  5. ≥ +2.3%
no data

Orange pin: Fond du Lac County internal point. Dark pin: Madison.

Internal point

Decimal
43.754700, -88.493300
DMS
43°45'16.92"N 88°29'35.88"W
UTM
16N 379783.2E 4845712.0N
Geohash
dpc0fm31s
Plus code
86MHQG34+VM

Towns in Fond du Lac County

7 incorporated places of 1,000+ people have residents in Fond du Lac County, 65,253 people together, or 63% of the county. Each figure counts only the part of the town inside Fond du Lac County; towns marked "part" extend into another county. The largest is Fond du Lac with 44,469.

  1. 01Fond du Lac44,469
  2. 02Ripon7,716
  3. 03North Fond du Lac5,419
  4. 04Waupun (part)3,551
  5. 05Campbellsport1,997
  6. 06Oakfield1,064
  7. 07Rosendale1,037
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Fond du Lac County

The Census 2024 county adjacency file lists 6 neighbors for Fond du Lac County. The most populous is Winnebago County, WI, with 173,307 residents. Distances run between Census internal points in a straight line.

Distance to Madison and the nearest big city

Madison is 64.8 miles SW of Fond du Lac County's internal point in a straight line. The nearest place of 100,000 or more is Milwaukee, WI (population 563,531), 54.6 miles away. The nearest place of 10,000 or more is Fond du Lac, WI (population 44,469), 2.9 miles away.

Fond du Lac County FIPS code

The FIPS code of Fond du Lac County is 55039: state code 55 for Wisconsin plus county code 039. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $73,485.

Questions people ask

What is the population of Fond du Lac County, Wisconsin?

The Census Vintage 2024 estimate for July 1, 2024 is 104,269. That is up 113 people (0.1%) from the July 2020 estimate of 104,156.

What is the FIPS code of Fond du Lac County?

55039. The first two digits (55) are Wisconsin; the last three (039) identify the county.

What is the largest town in Fond du Lac County?

Fond du Lac, with 44,469 residents inside Fond du Lac County in 2024.

Which counties border Fond du Lac County?

6 county-equivalents border it in the Census 2024 adjacency file: Winnebago County, WI; Washington County, WI; Sheboygan County, WI; Dodge County, WI; Calumet County, WI; Green Lake County, WI.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.