Seymour, Indiana demographics

Seymour, IN demographics: median age 33.3; 18.1% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Seymour city, Indiana · Incorporated city · GEOID 1868832. The survey estimates a population of 22,371 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Seymour is 33.3 years, with a 90% margin of error of 1.5 years. There are 8,382 households (±364). 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	33.3 ±1.5	38.1 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 22,371
Category	Count ± MOE	Share ± MOE (pp)	Indiana	U.S.
Under 18	6,799 ±767	30.4% ±3.4 pp	23.3%	22.0%
18–34	4,926 ±568	22.0% ±2.5 pp	22.8%	22.8%
35–64	7,729 ±661	34.5% ±2.9 pp	37.2%	38.0%
65 and older	2,917 ±373	13.0% ±1.6 pp	16.8%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 22,371
Category	Count ± MOE	Share ± MOE (pp)	Indiana	U.S.
Male	11,646 ±477	52.1% ±1.9 pp	49.6%	49.5%
Female	10,725 ±526	47.9% ±2.2 pp	50.4%	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: 22,371
Category	Count ± MOE	Share ± MOE (pp)	Indiana	U.S.
White alone	14,757 ±616	66.0% ±2.4 pp	77.1%	61.0%
Black or African American alone	239 ±99	1.1% ±0.4 pp	9.2%	12.2%
American Indian and Alaska Native alone	990 ±580 · low precision	4.4% ±2.6 pp · low precision	0.3%	0.9%
Asian alone	913 ±278	4.1% ±1.2 pp	2.6%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±24 · low precision	0.0% ±0.1 pp · low precision	0.0%	0.2%
Some other race alone	1,674 ±671	7.5% ±3.0 pp	3.4%	7.1%
Two or more races	3,798 ±1,047	17.0% ±4.7 pp	7.3%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 22,371
Category	Count ± MOE	Share ± MOE (pp)	Indiana	U.S.
Not Hispanic or Latino	17,011 ±665	76.0% ±2.6 pp	91.4%	80.7%
Hispanic or Latino	5,360 ±515	24.0% ±2.3 pp	8.6%	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: 8,382
Category	Count ± MOE	Share ± MOE (pp)	Indiana	U.S.
Married-couple family	3,540 ±383	42.2% ±4.2 pp	47.3%	46.9%
Other family: male householder, no spouse present	644 ±219	7.7% ±2.6 pp	5.1%	5.1%
Other family: female householder, no spouse present	1,204 ±327	14.4% ±3.9 pp	11.3%	12.2%
Nonfamily: householder living alone	2,459 ±362	29.3% ±4.1 pp	29.6%	28.7%
Nonfamily: householder not living alone	535 ±188	6.4% ±2.2 pp	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 8,382
Category	Count ± MOE	Share ± MOE (pp)	Indiana	U.S.
Households with people under 18	2,849 ±363	34.0% ±4.1 pp	29.9%	29.5%
Households without people under 18	5,533 ±483	66.0% ±5.0 pp	70.1%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 8,382
Category	Count ± MOE	Share ± MOE (pp)	Indiana	U.S.
One-person nonfamily households	2,459 ±362	29.3% ±4.1 pp	29.6%	28.7%
Two-person households	2,211 ±325	26.4% ±3.7 pp	34.9%	33.8%
Three-person households	1,789 ±369	21.3% ±4.3 pp	14.5%	15.3%
Four-person households	1,174 ±298	14.0% ±3.5 pp	11.9%	12.6%
Five-person households	458 ±155	5.5% ±1.8 pp	5.8%	5.9%
Six-person households	170 ±102 · low precision	2.0% ±1.2 pp · low precision	2.1%	2.2%
Seven or more people	121 ±78 · low precision	1.4% ±0.9 pp · low precision	1.3%	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: 22,371
Category	Count ± MOE	Share ± MOE (pp)	Indiana	U.S.
Native	19,046 ±1,007	85.1% ±4.2 pp	93.7%	85.9%
Foreign born	3,325 ±937	14.9% ±4.2 pp	6.3%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 20,715
Category	Count ± MOE	Share ± MOE (pp)	Indiana	U.S.
English only	16,235 ±928	78.4% ±3.9 pp	89.7%	77.7%
Spanish	3,624 ±695	17.5% ±3.3 pp	5.5%	13.6%
French, Haitian, or Cajun	14 ±25 · low precision	0.1% ±0.1 pp · low precision	0.4%	0.7%
German or other West Germanic	53 ±40 · low precision	0.3% ±0.2 pp · low precision	1.1%	0.5%
Russian, Polish, or other Slavic	15 ±26 · low precision	0.1% ±0.1 pp · low precision	0.3%	0.7%
Other Indo-European	222 ±221 · low precision	1.1% ±1.1 pp · low precision	0.9%	2.0%
Korean	0 ±24 · low precision	0.0% ±0.1 pp · low precision	0.1%	0.3%
Chinese, including Mandarin and Cantonese	0 ±24 · low precision	0.0% ±0.1 pp · low precision	0.4%	1.1%
Vietnamese	60 ±67 · low precision	0.3% ±0.3 pp · low precision	0.1%	0.5%
Tagalog, including Filipino	45 ±52 · low precision	0.2% ±0.3 pp · low precision	0.2%	0.6%
Other Asian and Pacific Island	405 ±239 · low precision	2.0% ±1.2 pp · low precision	0.8%	1.1%
Arabic	0 ±24 · low precision	0.0% ±0.1 pp · low precision	0.2%	0.5%
Other and unspecified	42 ±71 · low precision	0.2% ±0.3 pp · low precision	0.5%	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: 13,999
Category	Count ± MOE	Share ± MOE (pp)	Indiana	U.S.
Less than high school graduate	2,359 ±554	16.9% ±3.9 pp	9.6%	10.4%
High school graduate or equivalency	5,699 ±585	40.7% ±3.9 pp	32.5%	26.0%
Some college, no degree	2,609 ±390	18.6% ±2.7 pp	19.3%	19.1%
Associate’s degree	796 ±206	5.7% ±1.5 pp	9.1%	8.8%
Bachelor’s degree	1,711 ±342	12.2% ±2.4 pp	18.7%	21.6%
Graduate or professional degree	825 ±266	5.9% ±1.9 pp	10.8%	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: 22,151
Category	Count ± MOE	Share ± MOE (pp)	Indiana	U.S.
Same house	19,777 ±646	89.3% ±2.4 pp	87.3%	87.7%
Moved within same county	1,251 ±469	5.6% ±2.1 pp	6.5%	6.3%
Moved from a different county in the same state	589 ±268	2.7% ±1.2 pp	3.6%	3.1%
Moved from a different state	355 ±225 · low precision	1.6% ±1.0 pp · low precision	2.1%	2.3%
Moved from abroad	179 ±134 · low precision	0.8% ±0.6 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

12.4% of Seymour residents (±3.0 percentage points) had no health insurance coverage when surveyed, compared with 7.4% in Indiana and 8.4% nationally. 81.5% 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	Seymour	Indiana	U.S.	Compared with Indiana
People without health insurance Civilian noninstitutionalized population	12.4% ±3.0 pp	7.4%	8.4%	Higher
Households with a broadband subscription Households	81.5% ±4.0 pp	89.9%	91.0%	Lower
Veterans Civilian population age 18 and older	6.3% ±1.4 pp	6.3%	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 Seymour . 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 Seymour housing and cost context or return to the city profile.