Plummer
- County:
- Brule County
- County Seat:
- No
- Area (mi²):
- 35.543
- State:
- South Dakota
Plummer is located in Brule County, South Dakota. Plummer has a 2025 population of 15 . Plummer 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 Plummer is 17.5 years: 0 years for males, and 0 years for females. For every 100 females there are 14.3 males.