Fayette Township is a township in Decatur County, Iowa, United States. As of the 2000 census, its population was 185.
Fayette Township covers an area of 23.16 square miles (59.99 square kilometers); of this, 0.21 square miles (0.53 square kilometers) or 0.88 percent is water. The stream of Sevenmile Creek runs through this township.
The township contains two cemeteries: Hollen and Sweet Home.