Groton is a city located in Brown County, South Dakota. Groton has a 2025 population of 1,334. Groton is currently declining at a rate of -0.74% annually and its population has decreased by -3.75% since the most recent census, which recorded a population of 1,386 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.
Data after 2023 is projected based on recent change
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.
Race | Population | Percentage (of total) |
---|---|---|
White | 1,634 | 91.08% |
Other race | 89 | 4.96% |
Asian | 43 | 2.4% |
Two or more races | 28 | 1.56% |
Married
Widowed
Divorced
Separated
Never Married
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%.
Name | Median | Mean |
---|---|---|
Married Families | $119,028 | - |
Families | $113,068 | $121,153 |
Households | $82,083 | $100,274 |
Non Families | $37,500 | $52,685 |
Average Income
Median Household Income
Poverty Rate