Franklin Township is a township in Decatur County, Iowa, United States.

As of the 2000 census, its population was 370.

Franklin Township covers an area of 36.19 square miles (93.74 square kilometers); of this, 0.03 square miles (0.07 square kilometers) or 0.07 percent is water.

The township contains two cemeteries: Johnson and Kline.

This article about the geography of Decatur County, Iowa is a stub.