
Foster township
- County:
- Hutchinson County
- County Seat:
- No
- Area (mi²):
- 29.299
- State:
- South Dakota
Foster township is located in Hutchinson County, South Dakota. Foster township has a 2025 population of 266. Foster township is currently declining at a rate of 0% annually and its population has decreased by -0.37% since the most recent census, which recorded a population of 267 in 2020.
The average household income in Foster township is $111,920 with a poverty rate of 53.33%. The median age in Foster township is 32 years: 5.6 years for males, and 87.2 years for females.