Flat Creek township
- County:
- Perkins County
- County Seat:
- No
- Area (mi²):
- 35.943
- State:
- South Dakota
Flat Creek township is located in Perkins County, South Dakota. Flat Creek township has a 2025 population of 19. Flat Creek township 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 19 in 2020.
The median age in Flat Creek township is 20.5 years: 0 years for males, and 0 years for females.