| Official Name: | Flat Creek Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Missouri |
| Subdivision Type2: | County |
| Subdivision Name2: | Barry |
| Area Total Km2: | 138.07 |
| Area Land Km2: | 138.05 |
| Area Water Km2: | 0.02 |
| Area Total Sq Mi: | 53.31 |
| Area Land Sq Mi: | 53.3 |
| Area Water Sq Mi: | 0.01 |
| Area Water Percent: | 0.01 |
| Population As Of: | 2000 |
| Population Total: | 5462 |
| Population Density Km2: | 39.6 |
| Population Density Sq Mi: | 102.5 |
| Elevation Footnotes: | [1] |
| Elevation M: | 413 |
| Elevation Ft: | 1355 |
| Coordinates: | 36.6783°N -93.8619°W |
| Blank Name: | FIPS code |
| Blank Info: | 29-24436[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0766255 |
Flat Creek Township is one of twenty-five townships in Barry County, Missouri, United States. As of the 2000 census, its population was 5,462.
Flat Creek was organized in 1844, taking its name from Flat Creek.[3]
Flat Creek Township covers an area of 53.31sqmi and contains one incorporated settlement, Cassville (the county seat). It contains six cemeteries: Corinth, Horner, Oak Hill, Pilant, Quaker and Russell.
Flat Creek Township contains one airport or landing strip, Cassville Municipal Airport.