Custer
- County:
- Custer County
- County Seat:
- No
- Area (mi²):
- 51.294
- State:
- South Dakota
Custer is located in Custer County, South Dakota. Custer has a 2025 population of 27 . Custer is currently declining at a rate of 0% annually and its population has decreased by -3.57% since the most recent census, which recorded a population of 28 in 2020.
The median age in Custer is 14.1 years: 0 years for males, and 14.2 years for females. For every 100 females there are 63.3 males.