Custer
- County:
- Custer County
- County Seat:
- No
- Area (mi²):
- 2.48
- State:
- South Dakota
Custer is a city located in Custer County, South Dakota. Custer has a 2026 population of 1,829. Custer is currently declining at a rate of -2.35% annually and its population has decreased by -5.72% since the most recent census, which recorded a population of 1,940 in 2020.