Walnut Grove is located in Douglas County, South Dakota. Walnut Grove has a 2025 population of 114 . Walnut Grove is currently declining at a rate of 0% annually and its population has decreased by -0.87% since the most recent census, which recorded a population of 115 in 2020.
The average household income in Walnut Grove is $123,284 with a poverty rate of 0%. The median age in Walnut Grove is 29.1 years: 32.5 years for males, and 24.1 years for females. For every 100 females there are 84.5 males.
Data after 2023 is projected based on recent change
The racial composition of Walnut Grove includes 100% White, and smaller percentages for and multiracial populations.
White (100%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 190 | 100% |
Married
Widowed
Divorced
Separated
Never Married
Walnut Grove's average per capita income is $61,875. Household income levels show a median of $86,667. The poverty rate stands at 0%.
Name | Median | Mean |
|---|---|---|
| Households | $86,667 | $123,284 |
| Families | $86,667 | $123,284 |
| Married Families | $86,667 | - |
| Non Families | - | - |
Average Income
Median Household Income
Poverty Rate