Harrison Township is one of seventeen townships in Adair County, Iowa, USA. As of the 2020 census, its population was 178. History Harrison Township was organized in 1856. It was served by the Arbor Hill post office () from 1857 to 1907. Geography Harrison Township covers an area of and contains no incorporated settlements. According to the USGS, it contains two cemeteries: Fairview and Roberts. References External links US-Counties.com City-Data.com Townships in Adair County, Iowa Townships in Iowa 1856 establishments in Iowa Populated places established in 1856