Colfax Township is one of seventeen townships in Boone County, Iowa, USA. As of the 2000 census, its population was 746.
Colfax Township was organized in 1871. It is named for Schuyler Colfax.
Colfax Township covers an area of 34.97 square miles (90.6 km2) and contains no incorporated settlements. According to the USGS, it contains one cemetery, Olive Branch.
- ^ "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. 309.