North Sioux City, South Dakota demographics

North Sioux City, SD demographics: median age 36.6; 25.8% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · North Sioux City city, South Dakota · Incorporated city · GEOID 4645700. The survey estimates a population of 3,045 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in North Sioux City is 36.6 years, with a 90% margin of error of 8.7 years. There are 1,591 households (±136). 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	36.6 ±8.7	38.0 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 3,045
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Under 18	483 ±147	15.9% ±4.8 pp	24.2%	22.0%
18–34	979 ±217	32.2% ±7.1 pp	21.9%	22.8%
35–64	943 ±182	31.0% ±6.0 pp	35.9%	38.0%
65 and older	640 ±170	21.0% ±5.6 pp	18.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 3,045
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Male	1,497 ±129	49.2% ±4.2 pp	50.8%	49.5%
Female	1,548 ±129	50.8% ±4.2 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: 3,045
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
White alone	2,487 ±167	81.7% ±5.5 pp	80.7%	61.0%
Black or African American alone	137 ±80 · low precision	4.5% ±2.6 pp · low precision	2.3%	12.2%
American Indian and Alaska Native alone	0 ±10 · low precision	0.0% ±0.3 pp · low precision	7.5%	0.9%
Asian alone	96 ±90 · low precision	3.2% ±3.0 pp · low precision	1.4%	6.0%
Native Hawaiian and Other Pacific Islander alone	18 ±28 · low precision	0.6% ±0.9 pp · low precision	0.0%	0.2%
Some other race alone	70 ±85 · low precision	2.3% ±2.8 pp · low precision	1.6%	7.1%
Two or more races	237 ±142 · low precision	7.8% ±4.7 pp · low precision	6.5%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 3,045
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Not Hispanic or Latino	2,833 ±124	93.0% ±4.0 pp	95.2%	80.7%
Hispanic or Latino	212 ±121 · low precision	7.0% ±4.0 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: 1,591
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Married-couple family	701 ±144	44.1% ±8.2 pp	48.3%	46.9%
Other family: male householder, no spouse present	56 ±54 · low precision	3.5% ±3.4 pp · low precision	4.8%	5.1%
Other family: female householder, no spouse present	133 ±85 · low precision	8.4% ±5.3 pp · low precision	8.1%	12.2%
Nonfamily: householder living alone	568 ±160	35.7% ±9.6 pp	31.9%	28.7%
Nonfamily: householder not living alone	133 ±88 · low precision	8.4% ±5.5 pp · low precision	6.8%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 1,591
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Households with people under 18	391 ±94	24.6% ±5.5 pp	29.0%	29.5%
Households without people under 18	1,200 ±178	75.4% ±9.1 pp	71.0%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 1,591
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
One-person nonfamily households	568 ±160	35.7% ±9.6 pp	31.9%	28.7%
Two-person households	616 ±160	38.7% ±9.5 pp	35.5%	33.8%
Three-person households	199 ±93	12.5% ±5.7 pp	12.4%	15.3%
Four-person households	88 ±62 · low precision	5.5% ±3.9 pp · low precision	10.5%	12.6%
Five-person households	97 ±59 · low precision	6.1% ±3.7 pp · low precision	6.1%	5.9%
Six-person households	23 ±34 · low precision	1.4% ±2.1 pp · low precision	2.2%	2.2%
Seven or more people	0 ±14 · low precision	0.0% ±0.9 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: 3,045
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Native	2,885 ±134	94.7% ±4.3 pp	96.0%	85.9%
Foreign born	160 ±132 · low precision	5.3% ±4.3 pp · low precision	4.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 2,952
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
English only	2,749 ±154	93.1% ±4.7 pp	92.9%	77.7%
Spanish	126 ±101 · low precision	4.3% ±3.4 pp · low precision	2.6%	13.6%
French, Haitian, or Cajun	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.1%	0.7%
German or other West Germanic	34 ±33 · low precision	1.2% ±1.1 pp · low precision	0.8%	0.5%
Russian, Polish, or other Slavic	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.4%	0.7%
Other Indo-European	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.4%	2.0%
Korean	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.1%	0.3%
Chinese, including Mandarin and Cantonese	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.1%	1.1%
Vietnamese	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.1%	0.5%
Tagalog, including Filipino	43 ±55 · low precision	1.5% ±1.9 pp · low precision	0.2%	0.6%
Other Asian and Pacific Island	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.4%	1.1%
Arabic	0 ±10 · low precision	0.0% ±0.3 pp · low precision	0.1%	0.5%
Other and unspecified	0 ±10 · low precision	0.0% ±0.3 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: 2,183
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Less than high school graduate	134 ±104 · low precision	6.1% ±4.7 pp · low precision	6.8%	10.4%
High school graduate or equivalency	750 ±166	34.4% ±6.9 pp	29.0%	26.0%
Some college, no degree	375 ±125	17.2% ±5.5 pp	19.9%	19.1%
Associate’s degree	361 ±104	16.5% ±4.5 pp	12.3%	8.8%
Bachelor’s degree	281 ±98	12.9% ±4.3 pp	21.9%	21.6%
Graduate or professional degree	282 ±131	12.9% ±5.9 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: 3,030
Category	Count ± MOE	Share ± MOE (pp)	South Dakota	U.S.
Same house	2,528 ±193	83.4% ±6.3 pp	87.0%	87.7%
Moved within same county	192 ±135 · low precision	6.3% ±4.5 pp · low precision	5.7%	6.3%
Moved from a different county in the same state	99 ±87 · low precision	3.3% ±2.9 pp · low precision	3.7%	3.1%
Moved from a different state	211 ±113 · low precision	7.0% ±3.7 pp · low precision	3.2%	2.3%
Moved from abroad	0 ±10 · low precision	0.0% ±0.3 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

5.6% of North Sioux City residents (±3.8 percentage points) had no health insurance coverage when surveyed, compared with 9.0% in South Dakota and 8.4% nationally. 85.2% 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	North Sioux City	South Dakota	U.S.	Compared with South Dakota
People without health insurance Civilian noninstitutionalized population	5.6% ±3.8 pp · low precision	9.0%	8.4%	Not statistically different
Households with a broadband subscription Households	85.2% ±4.7 pp	89.6%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	11.0% ±5.2 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 North Sioux City . 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 North Sioux City housing and cost context or return to the city profile.