| Official Name: | Flat Creek Township, South Dakota |
| Settlement Type: | Township |
| Pushpin Map: | South Dakota |
| Pushpin Label: | Flat Creek Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | South Dakota |
| Subdivision Type2: | County |
| Subdivision Name2: | Perkins |
| Area Total Sq Mi: | 35.9 |
| Population As Of: | 2020 |
| Population Total: | 19 |
| Population Density Sq Mi: | 0.5 |
| Coordinates: | 45.8614°N -102.2608°W |
Flat Creek Township is a township in Perkins County, in the U.S. state of South Dakota. As of the 2020 census, it contains 19 people and 9 households.[1]