North Sioux City, SD

City in Union County, SD, US

By Neilsberg Research

Last updated May 1, 2026

Key Indicators

A quick look at key numbers

Population

3,045

Source: U.S. Census Bureau American Community Survey (ACS) 2020-2024 5-Year Estimates

Median Age

36.6

years ∙ half population younger than 36.6, half older

Diversity Index

36%

chance two random people differ in race and ethnicity

Nativity

5.3%

foreign-born population

94.7%Native

5.3% Foreign-born

Geographic Context

Location, size, and surroundings

About

North Sioux City is a city within Union County, South Dakota, United States.

Location

City in Union County, SD, US

Co-ordinates

DEC42.535885° N, 96.494717° W

DMS42° 32′ 09.19″ N, 96° 29′ 40.98″ W

Population Density & area

911.7/sq mi (352.4/km²)

Total Area

3.47 sq mi (8.97 km²)

Land Area

3.34 sq mi (8.64 km²) · 96.4%

Water Area

0.13 sq mi (0.33 km²) · 3.6%

Demographics & Living

Who lives here, how households are formed, and community composition

Population Composition

Key characteristics of the population

Sex Distribution

49.2% male

Male 49.2%

Female 50.8%

males per 100 females

North Sioux City 96.7

Union County 106.6

South Dakota 103.1

Nativity

5.3%

foreign-born population

94.7%Native

5.3% Foreign-born

% Foreign-born

North Sioux City 5.3%

Union County 2%

South Dakota 4%

Age Distribution

How the population is spread across age groups

Median Age

36.6

years ∙ half population younger than 36.6, half older

North Sioux City

36.6

Union County

41.5

South Dakota

Dependency ratio

58.4

dependents per 100 working-age adults

North Sioux City 58.4

Union County 77.1

South Dakota 73

AGE DISTRIBUTION

Distribution of age group

Median age

	North Sioux City	Union County	South Dakota
Age Group
Children (Under 18)	15.9%	24.1%	24.2%
Working age (18-64)	63.1%	56.4%	57.8%
Senior (65+)	21%	19.5%	18%
Dependency ratio
Total dependency ratio	58.4	77.1	73
Child dependency ratio	25.1	42.6	41.9
Old-age dependency ratio	33.3	34.5	31.1

Racial & Ethnic Composition

Racial and ethnic makeup and how it compares

Race & Ethnicity

White

79.3%

Black

4.5%

Asian

3.2%

Hispanic

Other

Note: White, Black, and Asian refer to individuals belonging to a single race and not of Hispanic origin. Hispanics may be of any race.

Diversity Index

36%

chance two random people differ in race and ethnicity

North Sioux City 36%

Union County 21.5%

South Dakota 35.3%

Note: The Diversity Index (DI), based on the Blau Index, measures the probability that two randomly selected individuals differ in race and ethnicity. Values range from 0 (no diversity) to 1 (high diversity) and are shown as percentages.

RACIAL & ETHNIC COMPOSITION

Race & Ethnicity

Percentage of North Sioux City population

	North Sioux City	Union County	South Dakota
Hispanic or Latino	7%	4.8%	4.8%
Mexican	5.2%	4.5%	2.6%
Puerto Rican	0%	0%	0.4%
Cuban	0%	0%	0.1%
Other Hispanic / Latino	1.7%	0.3%	1.7%
Not Hispanic or Latino	93%	95.2%	95.2%
One race	87.5%	91.5%	90.8%
White	79.3%	88.4%	79.8%
Black or African American	4.5%	0.9%	2.1%
American Indian and Alaska Native	0%	0.7%	7.1%
Asian	3.2%	1.1%	1.4%
Native Hawaiian and Other Pacific Islander	0.6%	0.1%	0%
Some Other Race	0%	0.2%	0.3%
Two or more races (Multiracial)	5.5%	3.7%	4.4%

Household & Families Composition

Household size, type, and family structure

Household structure

55.9% family

Family 55.9%

Non family 44.1%

% family households

North Sioux City 55.9%

Union County 68.7%

South Dakota 61.3%

Average household size

1.91

persons per household

North Sioux City

1.91

Union County

2.32

South Dakota

2.39

Household & Family COMPOSITION

Households

Percentage of North Sioux City population

	North Sioux City	Union County	South Dakota
Total households	1,591	7,310	365,544
Average houshold size	1.91	2.32	2.39
Family households	890	5,020	224,058
Average family size	2.35	2.77	3.05
Married couple family	701	4,342	176,597
Other families	189	678	47,461
Male householder	56	272	17,711
Female householder	133	406	29,750
Non-family households	701	2,290	141,486
One-person households	568	1,818	116,755
Male householder	225	909	57,880
Senior (65+) living alone	63	347	17,403
Female householder	343	909	58,875
Senior (65+) living alone	184	510	29,381
Other living arrangements	133	472	24,731

Housing Profile

Housing stock, ownership, rentals, and cost burdens

Total housing units

1,644

housing units

North Sioux City 1,644

Union County 7,588

South Dakota 408,584

Occupancy status

96.8% occupied

Occupied 96.8%

Vacant 3.2%

vacancy rate

North Sioux City 3.2%

Union County 3.7%

South Dakota 10.5%

Housing Characteristics

How the housing supply is structured and used

Types of Housing unit

44.7%

Single family houses

44.7%

Apartments in multi-unit structures

47%

Mobile homes

8.3%

Boat, RV, van, etc

Median Year Built

1996

Half of houses were built before 1996, and half after.

Historic ∙ 1939 or earlier

Postwar & mid-century ∙ 1940 - 1969

6.1%

Late 20th century ∙ 1970 - 1999

44.4%

Modern ∙ 2000 or later

44.6%

Note: Median year built reflects occupied units only; distribution includes all units.

Housing Characteristics

Units, rooms & bedrooms

Physical characteristics of housing units

	North Sioux City	Union County	South Dakota
Rooms per unit
Median rooms	4.7	6.5	5.9
1–3 rooms	17.5%	9.6%	13.6%
4–6 rooms	59.9%	40.9%	44.6%
7+ rooms	22.6%	49.5%	41.8%
Bedrooms
No bedroom / studio	0%	1.2%	1.9%
1 bedroom	21.2%	8%	10.1%
2 bedrooms	36.7%	23.4%	26.4%
3 bedrooms	31.3%	32.4%	32%
4+ bedrooms	10.8%	35%	29.6%
At a glance
Median year built	1996	1993	1982
Total housing units	1,644	7,588	408,584

Occupancy Profile

Who is inside and how they use it

Homeownership

49.5% owners

Renter-occupied 50.5%

Owner-occupied 49.5%

homeownership rate

North Sioux City 49.5%

Union County 73.1%

South Dakota 68.6%

Average household size

2.12

Owner-occupied

1.71

Renter-occupied

owner-occupied average size

North Sioux City 2.12

Union County 2.52

South Dakota 2.54

Housing Characteristics

Occupied unit characteristics

Tenure, crowding, and utilities

	North Sioux City	Union County	South Dakota
Total occupied units	1,591	7,310	365,544
Year moved in
2020 or later	35.3%	22.8%	25.4%
2010 to 2019	45.4%	45.9%	39.7%
2000 to 2009	10.1%	16.1%	16.2%
1999 or earlier	9.3%	15.1%	18.7%
Occupants per room
1.00 or fewer	98.6%	99.1%	97.7%
1.01 to 1.50	1.4%	0.4%	1.6%
1.51 or more	0%	0.5%	0.7%
Vehicles availability
No vehicles	5.3%	3.7%	5.2%
1 vehicle	38%	23.8%	28.4%
2 vehicles	36%	37.3%	36.3%
3 or more vehicles	20.7%	35.3%	30.1%
House heating fuel used
Gas	49.9%	64.1%	63.1%
Electricity	46.6%	33.4%	32.4%
Solar	0%	0%	0%
Fuel oil, kerosene etc	0%	0.3%	1.3%
All other fuels	0.8%	1.5%	2.4%
No fuel used	2.6%	0.7%	0.8%
Selected characteristics
Lacking complete plumbing	0%	0.2%	0.5%
Lacking complete kitchen	0%	1.6%	0.9%
No telephone service available	0%	0.2%	1.1%

Housing Value

What owner-occupied units are worth

Median home value

$269,800

owner-occupied units

Median value(USD)

North Sioux City

$269,800

Union County

$301,100

South Dakota

$257,400

Housing Cost Burden

15%

of homeowners with a mortgage are cost-burdened

% Cost-Burdened Households

Owners with a mortgage

15%

Owners without a mortgage

21.1%

Renters

43.9%

Note: Households spending 30% or more of their income on housing costs are considered cost-burdened.

Financial characteristics

Property value and housing costs

Tenure, crowding, and utilities

	North Sioux City	Union County	South Dakota
Property value
Median Value	$269,800	$301,100	$257,400
Under $100,000	20.6%	10.6%	16.1%
$100,000 - $200,000	19.8%	19%	19.5%
$200,000 - $300,000	15.1%	20.2%	24.4%
$300,000 - $500,000	28.8%	30%	26%
$500,000 - $1,000,000	15.6%	18.4%	12.1%
$1,000,000 and more	0%	1.8%	1.8%
Owner-occupied households
With a mortgage	62.6%	60.5%	54.5%
Without a mortgage	37.4%	39.5%	45.5%
Median monthly owner costs
With a mortgage	$2,065	$1,758	$1,680
Without a mortgage	$749	$735	$617
Gross rent
Median rent	$1,098	$1,069	$946

Education Profile

How educated is the community and how education pays off

Adults with a college degree

25.8%

of adults 25+ with a bachelor's degree or higher

North Sioux City 25.8%

Union County 37%

South Dakota 31.9%

Adults without a high school diploma

6.1%

of adults (25+) without a high school diploma

North Sioux City 6.1%

Union County 4.4%

South Dakota 6.8%

School Enrollment

Who is enrolled in school and at what level

School enrollment

611

population (age 3+) enrolled in school

Nursery / Preschool

4.6%

K–12

64.8%

College / Undergraduate

26.8%

Graduate / Professional

3.8%

College-going rate (18-24 yr olds)

28.2%

of 18-24-year-olds in college or graduate school

North Sioux City

28.2%

Union County

13.3%

South Dakota

35.1%

Enrollment & school type

Enrollment levels, college-going rate, and public vs private school split

Population 3+ currently enrolled in a school

	North Sioux City	Union County	South Dakota
Total enrolled (age 3+)	611	3,829	216,085
Nursery / preschool	4.6%	7.3%	6.1%
K–12	64.8%	81.1%	73%
Kindergarten	0.8%	5.3%	5.6%
Elementary: Grades 1–4	13.4%	22.3%	22.3%
Elementary: Grades 5–8	15.5%	29%	22.8%
High School: Grades 9–12	35%	24.5%	22.3%
College or graduate school	30.6%	11.5%	20.9%
College, undergraduate	26.8%	6.4%	17.1%
Graduate, professional school	3.8%	5.1%	3.8%
College-going rate · 18-24 yr olds	28.2%	13.3%	35.1%
School type
Public school	91.3%	86.8%	86.9%
Private school	8.7%	13.2%	13.1%

Education Attainment by Level & Gender

What is the highest level of education completed among adults

Education attainment

2,183

population 25 years and over

Total adults (25+)

Less than 9th grade

2.4%

9th-12th, no diploma

3.7%

HS graduate

34.4%

Some college no degree

17.2%

Associates degree

16.5%

Bachelors degree

12.9%

Graduate or professional degree

12.9%

Attainment by gender

Male vs Female

Adults (25+) · Share within each education level

% male · % female

Less than 9th grade

100% · 0%

9th-12th, no diploma

74.1% · 25.9%

HS graduate

56.7% · 43.3%

Some college no degree

39.5% · 60.5%

Associates degree

41.6% · 58.4%

Bachelors degree

28.8% · 71.2%

Graduate or professional degree

51.8% · 48.2%

Educational Attainment Overview

Distribution and key education attainment rates for adults (25+)

Highest credential completed · adults 25+

	North Sioux City	Union County	South Dakota
Population (25+)	2,183	11,842	603,746
Less than 9th grade	2.4%	1.8%	2.6%
9th–12th, no diploma	3.7%	2.6%	4.2%
High school diploma or GED	34.4%	26.2%	29%
Some college, no degree	17.2%	19.8%	19.9%
Associate's degree	16.5%	12.7%	12.3%
Bachelor's degree or higher	25.8%	37%	31.9%
Bachelor's degree	12.9%	23.7%	21.9%
Graduate or professional	12.9%	13.3%	10%
High School or higher	93.9%	95.7%	93.2%

Earnings by education level

percentage as applicable

Median Earnings

$53,681

Median earnings for adults 25+, by level

Less than HS graduate

$88,098

HS graduate

$36,544

Some college or associates

$70,795

Bachelors degree

$44,375

Graduate or professional degree

$83,714

Poverty Rate

5.3%

for ages 25+, with bachelors degree or higher

Less than HS graduate

32.1%

HS graduate

10.5%

Some college or associates

Bachelors degree or higher

5.3%

Outcomes by Education Level

Earnings and poverty rates across education levels (25+)

Adults 25+

	North Sioux City	Union County	South Dakota
Median earnings
Population 25+, with earnings	$53,681	$59,260	$49,402
Less than high school graduate	$88,098	$64,231	$33,790
High school graduate (includes equivalency)	$36,544	$42,465	$40,544
Some college or associate's degree	$70,795	$56,064	$47,061
Bachelor's degree	$44,375	$64,819	$58,363
Graduate or professional degree	$83,714	$89,773	$72,377
Poverty rates
Less than high school graduate	32.1%	16.5%	28%
High school graduate (includes equivalency)	10.5%	9.7%	13.2%
Some college or associate's degree	5%	6.5%	8.5%
Bachelor's degree or higher	5.3%	3.2%	4.2%

Insights for North Sioux City, by topic

Income By year By race By age By gender

Population By year By race By age By gender

About Neilsberg Research

Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.

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