CITY · 1990 CENSUS

Groton

South Dakota · 1,212 residents · 1.75 sq mi

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Groton is home to 1,212 people in South Dakota. The median age is 40.1, about 7 years above the US median. The typical home is worth $36,700. Renters pay $217 a month at the median. The median household earns $20,714, about 31% below the national median. 69% of homes are owner-occupied.

At a glance

Lower income

below the US median

US median: $30,130

Older

median age 40.1

US median: 33.0

Average education

18% hold a bachelor's degree

US average: 20%

More affordable

home values down 26%, inflation adjusted

US median home: $93,722

Section 01

Population & growth

Total population

1,212

−11%vs 2000

vs 1,356 in 2000

1990 – 2025

Median age

40.1

+4%vs 2000

vs 38.6 in 2000

US average: 33.0

Land area

1.75 sq mi

Population, 1990 – 2024

20242K

Age distribution, 1990

Under 56.2%(75)

US avg: 7.3%

5 to 96.5%(79)

US avg: 7.3%

10 to 147.8%(94)

US avg: 6.9%

15 to 196.4%(78)

US avg: 7.1%

20 to 244.8%(58)

US avg: 7.5%

25 to 3411.3%(137)

US avg: 17.5%

35 to 4412.3%(149)

US avg: 15.1%

45 to 548.8%(107)

US avg: 10.2%

55 to 649.9%(120)

US avg: 8.5%

65 to 7410.6%(129)

US avg: 7.3%

75 to 849.1%(110)

US avg: 4%

85 and over6.3%(76)

US avg: 1.2%

BAR + DOT: THIS PLACE · TICK: US AVERAGE

Section 02

Income & economy

Median household income

$20,714

−28%inflation adjusted, since 2000

vs $38,125 in 2000

US average: $30,130

1990 – 2024

Per capita income

$10,040

−42%vs 2000

vs $17,248 in 2000

US average: $14,340

Poverty rate

10.7%

+4.8 ptsvs 2000

vs 5.8% in 2000

US average: 13.2%

Section 03

Housing

Median home value

$36,700

−26%inflation adjusted, since 2000

vs $65,200 in 2000

US average: $93,722

1990 – 2024

Median gross rent

$217

−22%inflation adjusted, since 2000

vs $368 in 2000

US average: $450

Owner-occupied

69.3%

−4.4 ptsvs 2000

vs 73.7% in 2000

30.7% rent

Section 04

Race & ethnicity

2000

White, non-Hispanic98.7%(1,338)

Black0%(0)

Hispanic / Latino0.4%(6)

Asian0%(0)

Other0%

1990

White, non-Hispanic97.8%(1,185)

Black1.1%(13)

Hispanic / Latino0.2%(3)

Asian0%(0)

Other1.2%(14)

No data for the years selected.

Section 04 · Origins

Detailed origins & ancestry

Detailed origin tables are available for 2024; showing 2024 data.

Hispanic origin

Mexican4.3%(72)

South American0.9%(16)

Peruvian0.9%(16)

Asian origin

Burmese1.5%(26)

Thai0.6%(10)

Ancestry

German35.6%(602)

Norwegian11.1%(188)

English8.5%(144)

Irish7.3%(123)

Swedish3.8%(65)

Polish2.5%(43)

American1.8%(31)

Welsh1.4%(23)

Russian1.1%(19)

Danish1.1%(18)

Scottish1%(17)

French0.8%(14)

+ 9 more ancestry groups with data

Italian0.7%(12)

Dutch0.7%(11)

Finnish0.7%(11)

Czech0.6%(10)

French Canadian0.5%(9)

Swiss0.4%(6)

Scotch-Irish0.2%(4)

Belgian0.2%(3)

Greek0.2%(3)

RANKED:Largest German population · Largest Norwegian population · Largest English population · Largest Irish population · Largest Mexican population

Section 05

Education

Bachelor's degree or higher

18.1%

−4.0 ptsvs 2000

vs 22.1% in 2000

US average: 20.3%

High school or higher

71.4%

−13.2 ptsvs 2000

vs 84.5% in 2000

US average: 75.2%

Graduate degree

4.0%

−0.5 ptsvs 2000

vs 4.5% in 2000

US average: 7.1%

Section 06

Commute & transportation

Average commute

21.8 min

+78%vs 2000

vs 12.2 min in 2000

US average: 21.9

Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

Marital status (2024)

Men 15+

Never married19.5%(118)

Married67%(406)

Widowed2.1%(13)

Divorced11.4%(69)

Women 15+

Never married19.2%(118)

Married65.6%(402)

Widowed8.8%(54)

Divorced6.4%(39)

SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024

Section 09

Health coverage

Showing 2024 (the nearest year with coverage data).

Uninsured

4.9%

+1.6 ptssince 2013

from 3.3% in 2013

US average: 8.4%

Employer-based

72.5%

+0.3 ptssince 2020

from 72.2% in 2020

US average: 54.8%

Direct-purchase

15.6%

−3.8 ptssince 2020

from 19.4% in 2020

US average: 13.8%

Medicare

11.9%

−2.7 ptssince 2020

from 14.6% in 2020

US average: 18.4%

Medicaid

7.4%

+2.8 ptssince 2020

from 4.6% in 2020

US average: 20.9%

VA health care

1.5%

−1.7 ptssince 2020

from 3.2% in 2020

US average: 2.2%

Any private

86.4%

−4.0 ptssince 2020

from 90.4% in 2020

US average: 67.1%

Any public

17.5%

−2.4 ptssince 2020

from 19.9% in 2020

US average: 36.7%

Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.

Section 09 · Service history

Veterans

Veterans by period of service, 2024

Gulf War (2001 or later)25%(18)

US avg: 26.4%

Gulf War (1990s)52.8%(38)

US avg: 24.3%

Vietnam era8.3%(6)

US avg: 33.1%

Korean War0%(0)

US avg: 4.5%

World War II0%(0)

US avg: 1%

Share of the 72 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.

BAR + DOT: THIS PLACE · TICK: US AVERAGE

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