
Foster township
- County:
- Perkins County
- County Seat:
- No
- Area (mi²):
- 64.319
- State:
- South Dakota
Foster township is located in Perkins County, South Dakota. Foster township has a 2025 population of 21. Foster township is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 21 in 2020.
The average household income in Foster township is $0 with a poverty rate of 0%. The median age in Foster township is 0 years: 0 years for males, and 0 years for females.