Grand River Township is one of seventeen townships in Adair County, Iowa, USA. As of the 2020 census, its population was 140. History Grand River Township was organized in 1855. Geography Grand River Township covers an area of and contains no incorporated settlements. According to the USGS, it contains three cemeteries: Boley Farm, Grand River Center and Hebron. References External links US-Counties.com City-Data.com Townships in Adair County, Iowa Townships in Iowa 1855 establishments in Iowa Populated places established in 1855