Madison township
- County:
- Lake County
- County Seat:
- No
- Area (mi²):
- 35.137
- State:
- South Dakota
Madison township is located in Lake County, South Dakota. Madison township has a 2025 population of 15. Madison 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 15 in 2020.
The median age in Madison township is 55.3 years: 0 years for males, and 0 years for females.