Liberty township
- County:
- Brown County
- County Seat:
- No
- Area (mi²):
- 46.83
- State:
- South Dakota
Liberty township is located in Brown County, South Dakota. Liberty township has a 2026 population of 43. Liberty township is currently declining at a rate of -2.27% annually and its population has decreased by -2.27% since the most recent census, which recorded a population of 44 in 2020.