Butler township
- County:
- Day County
- County Seat:
- No
- Area (mi²):
- 34.866
- State:
- South Dakota
Butler township is located in Day County, South Dakota. Butler township has a 2026 population of 36. Butler township is currently declining at a rate of -2.7% annually and its population has decreased by 0% since the most recent census, which recorded a population of 36 in 2020.