Groton Flag

Groton

County:
Brown County
County Seat:
No
Area (mi²):
1.751
State:
South Dakota

Groton is a city located in Brown County, South Dakota. Groton has a 2026 population of 1,324. Groton is currently declining at a rate of -0.68% annually and its population has decreased by -4.13% since the most recent census, which recorded a population of 1,381 in 2020.

The median household income in Groton is $89,861 with a poverty rate of 4.35%. The median age in Groton is 33.9 years: 34.1 years for males, and 32.9 years for females. For every 100 females there are 107.2 males.

1.3K
Total Population
756
Density (mi²)
-9 -0.68%
Growth

Groton Population

Groton Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20261,324-9-0.68%
20251,333-10-0.74%
20241,343-9-0.67%
20231,352-23-1.67%
20221,375-6-0.43%
20211,38100%
20201,381-4-0.29%
20191,482-14-0.94%
20181,496-18-1.19%
20171,514140.93%
20161,50050.33%
20151,49520.13%
20141,493-6-0.4%
20131,49950.33%
20121,494221.49%
20111,472140.96%
20101,46020.14%

Median Age

Overall: 33.9 years
Female: 32.9 years
Male: 34.1 years

Groton Adults

There are 1,174 adults, (220 of whom are seniors) in Groton.

Sex Ratio

Female: 816 (48.3%)
Male: 875 (51.7%)

Demographics

The racial composition of Groton includes 90.01% White, 4.14% other race, and smaller percentages for Two or more races, Asian, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White1,52290.01%
Other race704.14%
Two or more races412.42%
Asian362.13%
Native American221.3%
Race
Population ↓
Percentage (of total)
Other race704.14%
Two or more races181.06%
Race
Population ↓
Percentage (of total)
White1,52290.01%
Asian362.13%
Two or more races231.36%
Native American221.3%

Groton Marital Status

Economics and Income Statistics

Groton 's average per capita income is $60,000. Household income levels show a median of $89,861. The poverty rate stands at 4.35%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$121,964-
Families$116,650$127,796
Households$89,861$107,886
Non Families$48,750$52,045

$60,000

Average Income

$89,861

Median Household Income

4.35%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)