Fairburn
- County:
- Custer County
- County Seat:
- No
- Area (mi²):
- 0.327
- State:
- South Dakota
Fairburn is a town located in Custer County, South Dakota. Fairburn has a 2026 population of 68. Fairburn is currently growing at a rate of 4.62% annually and its population has increased by 19.3% since the most recent census, which recorded a population of 57 in 2020.