Edna Township is one of sixteen townships in Cass County, Iowa, United States.

Edna Township covers an area of 34.67 square miles (89.8 km2) and contains no incorporated settlements.

According to the USGS, it contains two cemeteries: Reno and Calvary in the Saint Timothy Roman Catholic Church yard.

Chief Mahaska was buried along the Nodaway River in Edna Township after he was killed in 1834.

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