Fond du Lac, Wisconsin demographics

Fond du Lac, WI demographics: median age 36.9; 21.3% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Fond du Lac city, Wisconsin · Incorporated city · GEOID 5526275. The survey estimates a population of 44,494 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Fond du Lac is 36.9 years, with a 90% margin of error of 0.9 years. There are 19,018 households (±550). Age and household distributions show how these totals are composed; they do not establish which neighborhood suits a particular person.

Every count and share is an estimate. “±” is a 90% margin of error (MOE); pp means percentage points. Derived shares use the category count divided by the named universe. Aggregated category MOEs and percentage MOEs are approximate. A margin larger than half its estimate is flagged as low precision. Blank source uncertainty is shown as unavailable, never zero.

Age distribution and sex

City, state and U.S. estimates · ACS 2020–2024
Measure / survey universe	City estimate ± MOE	State estimate ± MOE	U.S. estimate ± MOE
Median age Total population · years	36.9 ±0.9	40.2 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 44,494
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
Under 18	10,004 ±678	22.5% ±1.5 pp	21.4%	22.0%
18–34	10,842 ±632	24.4% ±1.4 pp	21.9%	22.8%
35–64	16,366 ±795	36.8% ±1.8 pp	38.2%	38.0%
65 and older	7,282 ±587	16.4% ±1.3 pp	18.5%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 44,494
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
Male	21,712 ±485	48.8% ±1.1 pp	50.1%	49.5%
Female	22,782 ±482	51.2% ±1.1 pp	49.9%	50.5%

The age groups are mutually exclusive and cover the entire population. The sex categories follow this ACS table’s published classification; they are not a survey of gender identity.

Race and Hispanic origin

Race · B02001 · ACS 2020–2024 Total population: 44,494
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
White alone	37,081 ±700	83.3% ±1.6 pp	80.1%	61.0%
Black or African American alone	1,336 ±345	3.0% ±0.8 pp	6.1%	12.2%
American Indian and Alaska Native alone	277 ±231 · low precision	0.6% ±0.5 pp · low precision	0.8%	0.9%
Asian alone	1,603 ±235	3.6% ±0.5 pp	3.0%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±21 · low precision	0.0% ±0.0 pp · low precision	0.0%	0.2%
Some other race alone	880 ±352	2.0% ±0.8 pp	2.5%	7.1%
Two or more races	3,317 ±540	7.5% ±1.2 pp	7.6%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 44,494
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
Not Hispanic or Latino	40,332 ±494	90.6% ±1.1 pp	92.0%	80.7%
Hispanic or Latino	4,162 ±493	9.4% ±1.1 pp	8.0%	19.3%

Hispanic origin and race are separate questions. People of Hispanic or Latino origin may be of any race and appear in both tables. Do not add the Hispanic share to race shares. Race alone and two-or-more-race groups are the mutually exclusive categories of the race table.

Household types, children and living alone

Household types · B11001 · ACS 2020–2024 Households: 19,018
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
Married-couple family	7,418 ±469	39.0% ±2.2 pp	46.8%	46.9%
Other family: male householder, no spouse present	946 ±230	5.0% ±1.2 pp	4.5%	5.1%
Other family: female householder, no spouse present	1,853 ±311	9.7% ±1.6 pp	9.1%	12.2%
Nonfamily: householder living alone	7,597 ±657	39.9% ±3.3 pp	31.5%	28.7%
Nonfamily: householder not living alone	1,204 ±264	6.3% ±1.4 pp	8.0%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 19,018
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
Households with people under 18	4,787 ±369	25.2% ±1.8 pp	26.1%	29.5%
Households without people under 18	14,231 ±716	74.8% ±3.1 pp	73.9%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 19,018
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
One-person nonfamily households	7,597 ±657	39.9% ±3.3 pp	31.5%	28.7%
Two-person households	5,896 ±500	31.0% ±2.5 pp	37.0%	33.8%
Three-person households	2,257 ±350	11.9% ±1.8 pp	13.1%	15.3%
Four-person households	1,881 ±288	9.9% ±1.5 pp	10.9%	12.6%
Five-person households	822 ±206	4.3% ±1.1 pp	4.8%	5.9%
Six-person households	282 ±111	1.5% ±0.6 pp	1.7%	2.2%
Seven or more people	283 ±125	1.5% ±0.7 pp	1.0%	1.4%

A family household contains related people under the Census definition. A nonfamily household can contain one person or unrelated people sharing a home. Households with children can also appear in the household-type and size tables, so those tables must not be added together. Household estimates exclude people living in group quarters from the household universe.

Nativity and languages spoken at home

Nativity · B05002 · ACS 2020–2024 Total population: 44,494
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
Native	42,169 ±524	94.8% ±1.2 pp	94.8%	85.9%
Foreign born	2,325 ±522	5.2% ±1.2 pp	5.2%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 42,031
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
English only	38,426 ±657	91.4% ±1.5 pp	91.0%	77.7%
Spanish	2,167 ±499	5.2% ±1.2 pp	4.9%	13.6%
French, Haitian, or Cajun	3 ±5 · low precision	0.0% ±0.0 pp · low precision	0.2%	0.7%
German or other West Germanic	204 ±142 · low precision	0.5% ±0.3 pp · low precision	0.7%	0.5%
Russian, Polish, or other Slavic	29 ±46 · low precision	0.1% ±0.1 pp · low precision	0.3%	0.7%
Other Indo-European	157 ±101 · low precision	0.4% ±0.2 pp · low precision	0.7%	2.0%
Korean	0 ±21 · low precision	0.0% ±0.0 pp · low precision	0.1%	0.3%
Chinese, including Mandarin and Cantonese	430 ±239 · low precision	1.0% ±0.6 pp · low precision	0.3%	1.1%
Vietnamese	0 ±21 · low precision	0.0% ±0.0 pp · low precision	0.1%	0.5%
Tagalog, including Filipino	49 ±53 · low precision	0.1% ±0.1 pp · low precision	0.1%	0.6%
Other Asian and Pacific Island	448 ±207	1.1% ±0.5 pp	1.2%	1.1%
Arabic	0 ±21 · low precision	0.0% ±0.0 pp · low precision	0.1%	0.5%
Other and unspecified	118 ±150 · low precision	0.3% ±0.4 pp · low precision	0.3%	0.8%

Foreign born means not a U.S. citizen at birth; it includes naturalized citizens. Language categories describe speech at home among people age five and older. A language other than English at home does not establish that someone cannot speak English. This city page uses the published C16001 summary categories because the more detailed B16001 table does not provide these city records in this release.

Educational attainment

Highest completed education · B15003 · ACS 2020–2024 Population age 25 and older: 30,278
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
Less than high school graduate	2,682 ±459	8.9% ±1.5 pp	6.4%	10.4%
High school graduate or equivalency	11,148 ±693	36.8% ±2.2 pp	29.4%	26.0%
Some college, no degree	6,287 ±641	20.8% ±2.1 pp	19.5%	19.1%
Associate’s degree	3,715 ±483	12.3% ±1.6 pp	11.3%	8.8%
Bachelor’s degree	4,335 ±465	14.3% ±1.5 pp	22.0%	21.6%
Graduate or professional degree	2,111 ±353	7.0% ±1.2 pp	11.4%	14.1%

The denominator excludes residents under 25. Each person is counted in the highest attainment category they completed. This table does not measure the quality of local schools or the education level of every current student.

Residence one year earlier

Geographic mobility · B07003 · ACS 2020–2024 Population age 1 and older: 44,079
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
Same house	38,067 ±731	86.4% ±1.6 pp	88.2%	87.7%
Moved within same county	3,456 ±601	7.8% ±1.4 pp	6.2%	6.3%
Moved from a different county in the same state	2,113 ±491	4.8% ±1.1 pp	3.3%	3.1%
Moved from a different state	362 ±160	0.8% ±0.4 pp	2.0%	2.3%
Moved from abroad	81 ±56 · low precision	0.2% ±0.1 pp · low precision	0.3%	0.6%

These are respondents’ residence patterns one year before their survey response, pooled across the five-year window. They are not a net migration count for 2025. A person can move to a different house within the same city or county; moves within the same county should not automatically be interpreted as new arrivals to the city.

Health insurance, internet access and veterans

4.6% of Fond du Lac residents (±0.9 percentage points) had no health insurance coverage when surveyed, compared with 5.2% in Wisconsin and 8.4% nationally. 89.7% of households subscribe to broadband of any type, including cellular data plans. A subscription is not the same as available service: the FCC National Broadband Map shows providers at a specific address.

City, state and U.S. shares · ACS 2020–2024
Measure	Fond du Lac	Wisconsin	U.S.	Compared with Wisconsin
People without health insurance Civilian noninstitutionalized population	4.6% ±0.9 pp	5.2%	8.4%	Not statistically different
Households with a broadband subscription Households	89.7% ±1.8 pp	90.3%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	6.8% ±1.1 pp	6.2%	6.2%	Not statistically different

Reading and reusing the estimates

The Census table links above lead to the original detailed tables. Counts, source universes and uncertainty are retained in the source observation download for Fond du Lac . Compare these figures with the same survey window; do not compare one city’s five-year estimate with another city’s annual estimate as though they measured the same period. For methods, see uncertainty and denominator calculations.

Read Fond du Lac housing and cost context or return to the city profile.