Walnut Grove township
- County:
- Douglas County
- County Seat:
- No
- Area (mi²):
- 28.984
- State:
- South Dakota
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.