Madison, South Dakota demographics

Madison, SD demographics: median age 40.1; 34.3% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Madison city, South Dakota · Incorporated city · GEOID 4640220. The survey estimates a population of 6,094 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Madison is 40.1 years, with a 90% margin of error of 2.4 years. There are 2,573 households (±141). 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	40.1 ±2.4	38.0 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 6,094
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Under 18	1,164 ±174	19.1% ±2.9 pp	24.2%	22.0%
18–34	1,616 ±238	26.5% ±3.9 pp	21.9%	22.8%
35–64	1,930 ±254	31.7% ±4.2 pp	35.9%	38.0%
65 and older	1,384 ±229	22.7% ±3.8 pp	18.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 6,094
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Male	3,133 ±148	51.4% ±2.4 pp	50.8%	49.5%
Female	2,961 ±145	48.6% ±2.4 pp	49.2%	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: 6,094
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
White alone	5,759 ±130	94.5% ±2.1 pp	80.7%	61.0%
Black or African American alone	80 ±67 · low precision	1.3% ±1.1 pp · low precision	2.3%	12.2%
American Indian and Alaska Native alone	58 ±51 · low precision	1.0% ±0.8 pp · low precision	7.5%	0.9%
Asian alone	49 ±48 · low precision	0.8% ±0.8 pp · low precision	1.4%	6.0%
Native Hawaiian and Other Pacific Islander alone	19 ±33 · low precision	0.3% ±0.5 pp · low precision	0.0%	0.2%
Some other race alone	0 ±15 · low precision	0.0% ±0.2 pp · low precision	1.6%	7.1%
Two or more races	129 ±108 · low precision	2.1% ±1.8 pp · low precision	6.5%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 6,094
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Not Hispanic or Latino	5,830 ±117	95.7% ±1.9 pp	95.2%	80.7%
Hispanic or Latino	264 ±112	4.3% ±1.8 pp	4.8%	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: 2,573
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Married-couple family	1,017 ±158	39.5% ±5.7 pp	48.3%	46.9%
Other family: male householder, no spouse present	111 ±58 · low precision	4.3% ±2.2 pp · low precision	4.8%	5.1%
Other family: female householder, no spouse present	267 ±121	10.4% ±4.7 pp	8.1%	12.2%
Nonfamily: householder living alone	944 ±168	36.7% ±6.2 pp	31.9%	28.7%
Nonfamily: householder not living alone	234 ±90	9.1% ±3.5 pp	6.8%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 2,573
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Households with people under 18	621 ±158	24.1% ±6.0 pp	29.0%	29.5%
Households without people under 18	1,952 ±208	75.9% ±6.9 pp	71.0%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 2,573
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
One-person nonfamily households	944 ±168	36.7% ±6.2 pp	31.9%	28.7%
Two-person households	888 ±195	34.5% ±7.3 pp	35.5%	33.8%
Three-person households	312 ±123	12.1% ±4.7 pp	12.4%	15.3%
Four-person households	209 ±109 · low precision	8.1% ±4.2 pp · low precision	10.5%	12.6%
Five-person households	98 ±91 · low precision	3.8% ±3.5 pp · low precision	6.1%	5.9%
Six-person households	90 ±76 · low precision	3.5% ±2.9 pp · low precision	2.2%	2.2%
Seven or more people	32 ±29 · low precision	1.2% ±1.1 pp · low precision	1.5%	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: 6,094
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Native	5,965 ±93	97.9% ±1.5 pp	96.0%	85.9%
Foreign born	129 ±88 · low precision	2.1% ±1.4 pp · low precision	4.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 5,803
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
English only	5,569 ±132	96.0% ±2.0 pp	92.9%	77.7%
Spanish	49 ±29 · low precision	0.8% ±0.5 pp · low precision	2.6%	13.6%
French, Haitian, or Cajun	0 ±15 · low precision	0.0% ±0.3 pp · low precision	0.1%	0.7%
German or other West Germanic	57 ±66 · low precision	1.0% ±1.1 pp · low precision	0.8%	0.5%
Russian, Polish, or other Slavic	77 ±88 · low precision	1.3% ±1.5 pp · low precision	0.4%	0.7%
Other Indo-European	6 ±14 · low precision	0.1% ±0.2 pp · low precision	0.4%	2.0%
Korean	0 ±15 · low precision	0.0% ±0.3 pp · low precision	0.1%	0.3%
Chinese, including Mandarin and Cantonese	0 ±15 · low precision	0.0% ±0.3 pp · low precision	0.1%	1.1%
Vietnamese	0 ±15 · low precision	0.0% ±0.3 pp · low precision	0.1%	0.5%
Tagalog, including Filipino	43 ±46 · low precision	0.7% ±0.8 pp · low precision	0.2%	0.6%
Other Asian and Pacific Island	0 ±15 · low precision	0.0% ±0.3 pp · low precision	0.4%	1.1%
Arabic	0 ±15 · low precision	0.0% ±0.3 pp · low precision	0.1%	0.5%
Other and unspecified	2 ±5 · low precision	0.0% ±0.1 pp · low precision	1.8%	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: 4,006
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Less than high school graduate	287 ±149 · low precision	7.2% ±3.7 pp · low precision	6.8%	10.4%
High school graduate or equivalency	970 ±197	24.2% ±4.8 pp	29.0%	26.0%
Some college, no degree	757 ±188	18.9% ±4.6 pp	19.9%	19.1%
Associate’s degree	616 ±183	15.4% ±4.5 pp	12.3%	8.8%
Bachelor’s degree	981 ±216	24.5% ±5.3 pp	21.9%	21.6%
Graduate or professional degree	395 ±152	9.9% ±3.8 pp	10.0%	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: 6,043
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Same house	4,734 ±306	78.3% ±5.0 pp	87.0%	87.7%
Moved within same county	517 ±227	8.6% ±3.8 pp	5.7%	6.3%
Moved from a different county in the same state	346 ±152	5.7% ±2.5 pp	3.7%	3.1%
Moved from a different state	411 ±238 · low precision	6.8% ±3.9 pp · low precision	3.2%	2.3%
Moved from abroad	35 ±40 · low precision	0.6% ±0.7 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 Madison residents (±1.6 percentage points) had no health insurance coverage when surveyed, compared with 9.0% in South Dakota and 8.4% nationally. 86.0% 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	Madison	South Dakota	U.S.	Compared with South Dakota
People without health insurance Civilian noninstitutionalized population	4.6% ±1.6 pp	9.0%	8.4%	Lower
Households with a broadband subscription Households	86.0% ±4.5 pp	89.6%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	6.5% ±2.1 pp	7.9%	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 Madison . 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 Madison housing and cost context or return to the city profile.