Willmar, Minnesota demographics

Willmar, MN demographics: median age 35.5; 25.3% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Willmar city, Minnesota · Incorporated city · GEOID 2770420. The survey estimates a population of 21,378 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Willmar is 35.5 years, with a 90% margin of error of 1.4 years. There are 8,297 households (±272). 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	35.5 ±1.4	38.8 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 21,378
Category	Count ± MOE	Share ± MOE (pp)	Minnesota	U.S.
Under 18	5,509 ±423	25.8% ±2.0 pp	22.9%	22.0%
18–34	5,063 ±431	23.7% ±2.0 pp	21.8%	22.8%
35–64	6,785 ±578	31.7% ±2.7 pp	38.0%	38.0%
65 and older	4,021 ±415	18.8% ±1.9 pp	17.3%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 21,378
Category	Count ± MOE	Share ± MOE (pp)	Minnesota	U.S.
Male	10,169 ±236	47.6% ±1.1 pp	50.1%	49.5%
Female	11,209 ±235	52.4% ±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: 21,378
Category	Count ± MOE	Share ± MOE (pp)	Minnesota	U.S.
White alone	13,577 ±679	63.5% ±3.2 pp	77.1%	61.0%
Black or African American alone	2,115 ±307	9.9% ±1.4 pp	7.0%	12.2%
American Indian and Alaska Native alone	200 ±76	0.9% ±0.4 pp	0.9%	0.9%
Asian alone	527 ±122	2.5% ±0.6 pp	5.1%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±18 · low precision	0.0% ±0.1 pp · low precision	0.0%	0.2%
Some other race alone	2,909 ±634	13.6% ±3.0 pp	2.9%	7.1%
Two or more races	2,050 ±638	9.6% ±3.0 pp	7.0%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 21,378
Category	Count ± MOE	Share ± MOE (pp)	Minnesota	U.S.
Not Hispanic or Latino	15,898 ±295	74.4% ±1.4 pp	93.6%	80.7%
Hispanic or Latino	5,480 ±285	25.6% ±1.3 pp	6.4%	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: 8,297
Category	Count ± MOE	Share ± MOE (pp)	Minnesota	U.S.
Married-couple family	3,460 ±354	41.7% ±4.0 pp	48.9%	46.9%
Other family: male householder, no spouse present	562 ±228	6.8% ±2.7 pp	4.5%	5.1%
Other family: female householder, no spouse present	1,067 ±243	12.9% ±2.9 pp	8.9%	12.2%
Nonfamily: householder living alone	2,533 ±342	30.5% ±4.0 pp	29.7%	28.7%
Nonfamily: householder not living alone	675 ±214	8.1% ±2.6 pp	7.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 8,297
Category	Count ± MOE	Share ± MOE (pp)	Minnesota	U.S.
Households with people under 18	2,435 ±294	29.3% ±3.4 pp	28.7%	29.5%
Households without people under 18	5,862 ±406	70.7% ±4.3 pp	71.3%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 8,297
Category	Count ± MOE	Share ± MOE (pp)	Minnesota	U.S.
One-person nonfamily households	2,533 ±342	30.5% ±4.0 pp	29.7%	28.7%
Two-person households	3,089 ±384	37.2% ±4.5 pp	35.6%	33.8%
Three-person households	823 ±228	9.9% ±2.7 pp	13.4%	15.3%
Four-person households	1,132 ±264	13.6% ±3.1 pp	12.3%	12.6%
Five-person households	312 ±133	3.8% ±1.6 pp	5.6%	5.9%
Six-person households	249 ±111	3.0% ±1.3 pp	2.0%	2.2%
Seven or more people	159 ±87 · low precision	1.9% ±1.0 pp · low precision	1.4%	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: 21,378
Category	Count ± MOE	Share ± MOE (pp)	Minnesota	U.S.
Native	17,598 ±559	82.3% ±2.6 pp	91.3%	85.9%
Foreign born	3,780 ±553	17.7% ±2.6 pp	8.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 19,723
Category	Count ± MOE	Share ± MOE (pp)	Minnesota	U.S.
English only	14,726 ±587	74.7% ±2.9 pp	87.6%	77.7%
Spanish	3,185 ±508	16.1% ±2.6 pp	4.2%	13.6%
French, Haitian, or Cajun	4 ±10 · low precision	0.0% ±0.1 pp · low precision	0.3%	0.7%
German or other West Germanic	36 ±37 · low precision	0.2% ±0.2 pp · low precision	0.4%	0.5%
Russian, Polish, or other Slavic	71 ±91 · low precision	0.4% ±0.5 pp · low precision	0.5%	0.7%
Other Indo-European	0 ±18 · low precision	0.0% ±0.1 pp · low precision	0.7%	2.0%
Korean	0 ±18 · low precision	0.0% ±0.1 pp · low precision	0.1%	0.3%
Chinese, including Mandarin and Cantonese	0 ±18 · low precision	0.0% ±0.1 pp · low precision	0.4%	1.1%
Vietnamese	0 ±18 · low precision	0.0% ±0.1 pp · low precision	0.4%	0.5%
Tagalog, including Filipino	14 ±23 · low precision	0.1% ±0.1 pp · low precision	0.2%	0.6%
Other Asian and Pacific Island	347 ±141	1.8% ±0.7 pp	2.4%	1.1%
Arabic	8 ±22 · low precision	0.0% ±0.1 pp · low precision	0.3%	0.5%
Other and unspecified	1,332 ±297	6.8% ±1.5 pp	2.6%	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: 13,822
Category	Count ± MOE	Share ± MOE (pp)	Minnesota	U.S.
Less than high school graduate	1,896 ±376	13.7% ±2.7 pp	6.1%	10.4%
High school graduate or equivalency	3,856 ±472	27.9% ±3.3 pp	23.3%	26.0%
Some college, no degree	2,785 ±420	20.1% ±3.0 pp	19.5%	19.1%
Associate’s degree	1,786 ±337	12.9% ±2.4 pp	11.8%	8.8%
Bachelor’s degree	2,573 ±397	18.6% ±2.8 pp	25.6%	21.6%
Graduate or professional degree	926 ±253	6.7% ±1.8 pp	13.8%	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: 20,850
Category	Count ± MOE	Share ± MOE (pp)	Minnesota	U.S.
Same house	17,216 ±723	82.6% ±3.4 pp	87.8%	87.7%
Moved within same county	2,121 ±606	10.2% ±2.9 pp	5.7%	6.3%
Moved from a different county in the same state	755 ±271	3.6% ±1.3 pp	4.3%	3.1%
Moved from a different state	237 ±234 · low precision	1.1% ±1.1 pp · low precision	1.8%	2.3%
Moved from abroad	521 ±318 · low precision	2.5% ±1.5 pp · low precision	0.4%	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

8.4% of Willmar residents (±1.9 percentage points) had no health insurance coverage when surveyed, compared with 4.7% in Minnesota and 8.4% nationally. 88.2% 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	Willmar	Minnesota	U.S.	Compared with Minnesota
People without health insurance Civilian noninstitutionalized population	8.4% ±1.9 pp	4.7%	8.4%	Higher
Households with a broadband subscription Households	88.2% ±2.6 pp	91.6%	91.0%	Lower
Veterans Civilian population age 18 and older	4.4% ±1.1 pp	5.9%	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 Willmar . 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 Willmar housing and cost context or return to the city profile.