Walnut Grove township is located in Douglas County, South Dakota. Walnut Grove township has a 2026 population of 114. Walnut Grove township 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 median age in Walnut Grove township is 42.4 years: 49.9 years for males, and 29.7 years for females. For every 100 females there are 90.6 males.
Data after 2023 is projected based on recent change
Overall: 42.4 years
Female: 29.7 years
Male: 49.9 years
There are 131 adults, (43 of whom are seniors) in Walnut Grove township.
Female: 96 (52.5%)
Male: 87 (47.5%)
The racial composition of Walnut Grove township includes 100% White, and smaller percentages for and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 183 | 100% |