South Detroit township
- County:
- Brown County
- County Seat:
- No
- Area (mi²):
- 36.209
- State:
- South Dakota
South Detroit township is located in Brown County, South Dakota. South Detroit township has a 2026 population of 50. South Detroit township is currently growing at a rate of 4.17% annually and its population has decreased by 0% since the most recent census, which recorded a population of 50 in 2020.
The median age in South Detroit township is 67.3 years: 47.8 years for males, and 67.6 years for females. For every 100 females there are 168.4 males.