Hecla township
- County:
- Brown County
- County Seat:
- No
- Area (mi²):
- 23.954
- State:
- South Dakota
Hecla township is located in Brown County, South Dakota. Hecla township has a 2026 population of 28. Hecla township is currently declining at a rate of 0% annually and its population has decreased by -3.45% since the most recent census, which recorded a population of 29 in 2020.