Afton
- County:
- Brookings County
- County Seat:
- No
- Area (mi²):
- 35.477
- State:
- South Dakota
Afton is located in Brookings County, South Dakota. Afton has a 2025 population of 228 . Afton is currently growing at a rate of 1.79% annually and its population has increased by 6.54% since the most recent census, which recorded a population of 214 in 2020.
The median age in Afton is 51.9 years: 51.8 years for males, and 59.1 years for females. For every 100 females there are 71.1 males.