Fitchburg, Wisconsin demographics

Fitchburg, WI demographics: median age 34.4; 57.7% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Fitchburg city, Wisconsin · Incorporated city · GEOID 5525950. The survey estimates a population of 32,619 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Fitchburg is 34.4 years, with a 90% margin of error of 1.0 years. There are 15,703 households (±641). 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	34.4 ±1.0	40.2 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 32,619
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
Under 18	5,413 ±593	16.6% ±1.8 pp	21.4%	22.0%
18–34	11,491 ±1,116	35.2% ±3.4 pp	21.9%	22.8%
35–64	10,749 ±966	33.0% ±3.0 pp	38.2%	38.0%
65 and older	4,966 ±671	15.2% ±2.1 pp	18.5%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 32,619
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
Male	17,651 ±662	54.1% ±2.0 pp	50.1%	49.5%
Female	14,968 ±660	45.9% ±2.0 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: 32,619
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
White alone	21,283 ±1,201	65.2% ±3.7 pp	80.1%	61.0%
Black or African American alone	2,839 ±671	8.7% ±2.1 pp	6.1%	12.2%
American Indian and Alaska Native alone	98 ±91 · low precision	0.3% ±0.3 pp · low precision	0.8%	0.9%
Asian alone	3,243 ±794	9.9% ±2.4 pp	3.0%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±21 · low precision	0.0% ±0.1 pp · low precision	0.0%	0.2%
Some other race alone	1,613 ±600	4.9% ±1.8 pp	2.5%	7.1%
Two or more races	3,543 ±898	10.9% ±2.8 pp	7.6%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 32,619
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
Not Hispanic or Latino	27,924 ±941	85.6% ±2.9 pp	92.0%	80.7%
Hispanic or Latino	4,695 ±937	14.4% ±2.9 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: 15,703
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
Married-couple family	5,842 ±556	37.2% ±3.2 pp	46.8%	46.9%
Other family: male householder, no spouse present	471 ±208	3.0% ±1.3 pp	4.5%	5.1%
Other family: female householder, no spouse present	1,207 ±356	7.7% ±2.2 pp	9.1%	12.2%
Nonfamily: householder living alone	6,115 ±844	38.9% ±5.1 pp	31.5%	28.7%
Nonfamily: householder not living alone	2,068 ±366	13.2% ±2.3 pp	8.0%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 15,703
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
Households with people under 18	3,127 ±426	19.9% ±2.6 pp	26.1%	29.5%
Households without people under 18	12,576 ±835	80.1% ±4.2 pp	73.9%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 15,703
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
One-person nonfamily households	6,115 ±844	38.9% ±5.1 pp	31.5%	28.7%
Two-person households	5,776 ±665	36.8% ±4.0 pp	37.0%	33.8%
Three-person households	2,017 ±488	12.8% ±3.1 pp	13.1%	15.3%
Four-person households	1,138 ±266	7.2% ±1.7 pp	10.9%	12.6%
Five-person households	376 ±128	2.4% ±0.8 pp	4.8%	5.9%
Six-person households	224 ±114 · low precision	1.4% ±0.7 pp · low precision	1.7%	2.2%
Seven or more people	57 ±50 · low precision	0.4% ±0.3 pp · low precision	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: 32,619
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
Native	28,122 ±833	86.2% ±2.6 pp	94.8%	85.9%
Foreign born	4,497 ±836	13.8% ±2.6 pp	5.2%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 30,904
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
English only	24,940 ±1,044	80.7% ±3.2 pp	91.0%	77.7%
Spanish	3,157 ±774	10.2% ±2.5 pp	4.9%	13.6%
French, Haitian, or Cajun	22 ±26 · low precision	0.1% ±0.1 pp · low precision	0.2%	0.7%
German or other West Germanic	0 ±21 · low precision	0.0% ±0.1 pp · low precision	0.7%	0.5%
Russian, Polish, or other Slavic	17 ±29 · low precision	0.1% ±0.1 pp · low precision	0.3%	0.7%
Other Indo-European	520 ±320 · low precision	1.7% ±1.0 pp · low precision	0.7%	2.0%
Korean	52 ±57 · low precision	0.2% ±0.2 pp · low precision	0.1%	0.3%
Chinese, including Mandarin and Cantonese	347 ±213 · low precision	1.1% ±0.7 pp · low precision	0.3%	1.1%
Vietnamese	308 ±246 · low precision	1.0% ±0.8 pp · low precision	0.1%	0.5%
Tagalog, including Filipino	34 ±57 · low precision	0.1% ±0.2 pp · low precision	0.1%	0.6%
Other Asian and Pacific Island	1,151 ±479	3.7% ±1.5 pp	1.2%	1.1%
Arabic	112 ±192 · low precision	0.4% ±0.6 pp · low precision	0.1%	0.5%
Other and unspecified	244 ±227 · low precision	0.8% ±0.7 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: 23,489
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
Less than high school graduate	1,363 ±370	5.8% ±1.6 pp	6.4%	10.4%
High school graduate or equivalency	4,046 ±679	17.2% ±2.8 pp	29.4%	26.0%
Some college, no degree	3,142 ±596	13.4% ±2.5 pp	19.5%	19.1%
Associate’s degree	1,391 ±306	5.9% ±1.3 pp	11.3%	8.8%
Bachelor’s degree	7,996 ±818	34.0% ±3.2 pp	22.0%	21.6%
Graduate or professional degree	5,551 ±709	23.6% ±2.9 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: 32,371
Category	Count ± MOE	Share ± MOE (pp)	Wisconsin	U.S.
Same house	25,566 ±1,031	79.0% ±3.2 pp	88.2%	87.7%
Moved within same county	3,750 ±751	11.6% ±2.3 pp	6.2%	6.3%
Moved from a different county in the same state	885 ±341	2.7% ±1.1 pp	3.3%	3.1%
Moved from a different state	1,778 ±542	5.5% ±1.7 pp	2.0%	2.3%
Moved from abroad	392 ±259 · low precision	1.2% ±0.8 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

6.5% of Fitchburg residents (±1.5 percentage points) had no health insurance coverage when surveyed, compared with 5.2% in Wisconsin and 8.4% nationally. 95.9% 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	Fitchburg	Wisconsin	U.S.	Compared with Wisconsin
People without health insurance Civilian noninstitutionalized population	6.5% ±1.5 pp	5.2%	8.4%	Not statistically different
Households with a broadband subscription Households	95.9% ±1.3 pp	90.3%	91.0%	Higher
Veterans Civilian population age 18 and older	3.1% ±0.8 pp	6.2%	6.2%	Lower

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 Fitchburg . 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 Fitchburg housing and cost context or return to the city profile.