Flat Creek
- County:
- Perkins County
- County Seat:
- No
- Area (mi²):
- 35.943
- State:
- South Dakota
Flat Creek is located in Perkins County, South Dakota. Flat Creek has a 2025 population of 20 . Flat Creek 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 20 in 2020.
The median age in Flat Creek is 20.5 years: 0 years for males, and 0 years for females. For every 100 females there are 157.1 males.