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

Richland Township covers an area of 35.78 square miles (92.67 square kilometers); of this, 0.04 square miles (0.1 square kilometers) or 0.11 percent is water.

The stream of Sand Creek runs through this township.

The township contains six cemeteries: Grand River, O'Grady, Tennessee, Warrick, Westervelt and Young.

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