Cass Township is one of seventeen townships in Boone County, Iowa, USA. As of the 2000 census, its population was 668.
Cass Township was established in 1858. It is named for Lewis Cass.
Cass Township covers an area of 18.36 square miles (47.6 km2) and contains no incorporated settlements. According to the USGS, it contains two cemeteries: Liberty and State Hospital.
- ^ "US Board on Geographic Names". United States Geological Survey. 2007-10-25. Retrieved 2008-01-31.
- ^ "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- ^ Goldthwait, Nathan Edward (1914). History of Boone County, Iowa, Volume 1. Pioneer Publishing Company. p. 251.