Plummer township
- County:
- Brule County
- County Seat:
- No
- Area (mi²):
- 35.543
- State:
- South Dakota
Plummer township is located in Brule County, South Dakota. Plummer township has a 2025 population of 19. Plummer township is currently declining at a rate of -5% annually and its population has decreased by -5% since the most recent census, which recorded a population of 20 in 2020.
The median age in Plummer township is 17.5 years: 0 years for males, and 0 years for females.