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 2025 population of 1,333 . Groton is currently declining at a rate of -0.74% annually and its population has decreased by -3.48% since the most recent census, which recorded a population of 1,381 in 2020.

The average household income in Groton is $100,274 with a poverty rate of 3.88%. The median age in Groton is 34 years: 33.6 years for males, and 34.5 years for females. For every 100 females there are 114.1 males.

1.3K
Total Population
761
Density (mi²)
-10 -0.74%
Growth

Groton Population

Groton Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Groton includes 91.08% White, 4.96% other race, and smaller percentages for Asian, Two or more races and multiracial populations.

Population by Race

White (91.08%)

Other race (4.96%)

Asian (2.4%)

Two or more races (1.56%)

Race
Population
Percentage (of total)
White1,63491.08%
Other race894.96%
Asian432.4%
Two or more races281.56%

Groton Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Groton's average per capita income is $56,492. Household income levels show a median of $82,083. The poverty rate stands at 3.88%.

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$119,028-
Families$113,068$121,153
Households$82,083$100,274
Non Families$37,500$52,685

$56,492

Average Income

$82,083

Median Household Income

3.88%

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)