Foster township
- County:
- Big Stone County
- County Seat:
- No
- Area (mi²):
- 30.135
- State:
- Minnesota
Foster township is located in Big Stone County, Minnesota. Foster township has a 2026 population of 118. 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 118 in 2020.
The median household income in Foster township is $86,250 with a poverty rate of 5.38%. The median age in Foster township is 61.8 years: 62.8 years for males, and 60.8 years for females. For every 100 females there are 88.4 males.