Calhoun Township, Calhoun County, Iowa  Calhoun Township is one of sixteen townships in Calhoun County, Iowa, USA. As of the 2000 census, its population was 166. Calhoun Township was the first township created in 1856. It originally included the entire county. Calhoun Township covers an area of and contains no incorporated settlements. According to the USGS, it contains one cemetery, Bishop.