Eagle Butte, South Dakota demographics

Eagle Butte, SD demographics: median age 28.0; 15.3% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Eagle Butte city, South Dakota · Incorporated city · GEOID 4617620. The survey estimates a population of 1,458 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Eagle Butte is 28.0 years, with a 90% margin of error of 2.5 years. There are 416 households (±59). 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	28.0 ±2.5	38.0 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 1,458
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Under 18	574 ±95	39.4% ±3.0 pp	24.2%	22.0%
18–34	355 ±82	24.3% ±4.3 pp	21.9%	22.8%
35–64	444 ±80	30.5% ±3.2 pp	35.9%	38.0%
65 and older	85 ±38	5.8% ±2.5 pp	18.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 1,458
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Male	700 ±133	48.0% ±5.8 pp	50.8%	49.5%
Female	758 ±131	52.0% ±4.7 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: 1,458
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
White alone	93 ±35	6.4% ±2.2 pp	80.7%	61.0%
Black or African American alone	16 ±27 · low precision	1.1% ±1.8 pp · low precision	2.3%	12.2%
American Indian and Alaska Native alone	1,283 ±221	88.0% ±7.9 pp	7.5%	0.9%
Asian alone	0 ±10 · low precision	0.0% ±0.7 pp · low precision	1.4%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±10 · low precision	0.0% ±0.7 pp · low precision	0.0%	0.2%
Some other race alone	0 ±10 · low precision	0.0% ±0.7 pp · low precision	1.6%	7.1%
Two or more races	66 ±87 · low precision	4.5% ±5.9 pp · low precision	6.5%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 1,458
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Not Hispanic or Latino	1,414 ±211	97.0% ±2.6 pp	95.2%	80.7%
Hispanic or Latino	44 ±69 · low precision	3.0% ±4.7 pp · low precision	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: 416
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Married-couple family	101 ±45	24.3% ±10.3 pp	48.3%	46.9%
Other family: male householder, no spouse present	50 ±24	12.0% ±5.5 pp	4.8%	5.1%
Other family: female householder, no spouse present	146 ±44	35.1% ±9.3 pp	8.1%	12.2%
Nonfamily: householder living alone	64 ±26	15.4% ±5.9 pp	31.9%	28.7%
Nonfamily: householder not living alone	55 ±28 · low precision	13.2% ±6.5 pp	6.8%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 416
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Households with people under 18	209 ±49	50.2% ±9.4 pp	29.0%	29.5%
Households without people under 18	207 ±50	49.8% ±9.7 pp	71.0%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 416
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
One-person nonfamily households	64 ±26	15.4% ±5.9 pp	31.9%	28.7%
Two-person households	165 ±46	39.7% ±9.5 pp	35.5%	33.8%
Three-person households	15 ±12 · low precision	3.6% ±2.9 pp · low precision	12.4%	15.3%
Four-person households	81 ±39	19.5% ±9.0 pp	10.5%	12.6%
Five-person households	29 ±20 · low precision	7.0% ±4.6 pp · low precision	6.1%	5.9%
Six-person households	39 ±24 · low precision	9.4% ±5.7 pp · low precision	2.2%	2.2%
Seven or more people	23 ±21 · low precision	5.5% ±4.9 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: 1,458
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Native	1,458 ±214	100.0% ±0.0 pp	96.0%	85.9%
Foreign born	0 ±10 · low precision	0.0% ±0.7 pp · low precision	4.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 1,291
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
English only	1,178 ±183	91.2% ±3.6 pp	92.9%	77.7%
Spanish	10 ±28 · low precision	0.8% ±2.2 pp · low precision	2.6%	13.6%
French, Haitian, or Cajun	0 ±10 · low precision	0.0% ±0.8 pp · low precision	0.1%	0.7%
German or other West Germanic	1 ±3 · low precision	0.1% ±0.2 pp · low precision	0.8%	0.5%
Russian, Polish, or other Slavic	0 ±10 · low precision	0.0% ±0.8 pp · low precision	0.4%	0.7%
Other Indo-European	0 ±10 · low precision	0.0% ±0.8 pp · low precision	0.4%	2.0%
Korean	0 ±10 · low precision	0.0% ±0.8 pp · low precision	0.1%	0.3%
Chinese, including Mandarin and Cantonese	0 ±10 · low precision	0.0% ±0.8 pp · low precision	0.1%	1.1%
Vietnamese	0 ±10 · low precision	0.0% ±0.8 pp · low precision	0.1%	0.5%
Tagalog, including Filipino	0 ±10 · low precision	0.0% ±0.8 pp · low precision	0.2%	0.6%
Other Asian and Pacific Island	0 ±10 · low precision	0.0% ±0.8 pp · low precision	0.4%	1.1%
Arabic	0 ±10 · low precision	0.0% ±0.8 pp · low precision	0.1%	0.5%
Other and unspecified	102 ±41	7.9% ±2.9 pp	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: 790
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Less than high school graduate	75 ±59 · low precision	9.5% ±7.4 pp · low precision	6.8%	10.4%
High school graduate or equivalency	325 ±80	41.1% ±8.1 pp	29.0%	26.0%
Some college, no degree	186 ±69	23.5% ±8.1 pp	19.9%	19.1%
Associate’s degree	83 ±34	10.5% ±4.0 pp	12.3%	8.8%
Bachelor’s degree	84 ±40	10.6% ±4.8 pp	21.9%	21.6%
Graduate or professional degree	37 ±25 · low precision	4.7% ±3.0 pp · low precision	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: 1,447
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Same house	1,380 ±220	95.4% ±5.5 pp	87.0%	87.7%
Moved within same county	54 ±55 · low precision	3.7% ±3.8 pp · low precision	5.7%	6.3%
Moved from a different county in the same state	12 ±13 · low precision	0.8% ±0.9 pp · low precision	3.7%	3.1%
Moved from a different state	1 ±2 · low precision	0.1% ±0.1 pp · low precision	3.2%	2.3%
Moved from abroad	0 ±10 · low precision	0.0% ±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

30.0% of Eagle Butte residents (±5.8 percentage points) had no health insurance coverage when surveyed, compared with 9.0% in South Dakota and 8.4% nationally. 84.4% 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	Eagle Butte	South Dakota	U.S.	Compared with South Dakota
People without health insurance Civilian noninstitutionalized population	30.0% ±5.8 pp	9.0%	8.4%	Higher
Households with a broadband subscription Households	84.4% ±6.2 pp	89.6%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	5.1% ±2.4 pp	7.9%	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 Eagle Butte . 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 Eagle Butte housing and cost context or return to the city profile.