Edna Township, Cass County, IowaEdna Township is one of sixteen townships in Cass County, Iowa, United States. As of the 2000 census, its population was 140.GeographyEdna Township covers an area of and contains no incorporated settlements. According to the USGS, it contains two cemeteries: Reno and Calvary in the Saint Timothy Roman Catholic Church yard.HistoryChief Mahaska was buried along the West Nodaway River in Edna Township after he was killed in 1834.