Walnut Township is one of seventeen townships in Adair County, Iowa, USA. At the 2010 census, its population was 176. Geography Walnut Township covers an area of and contains no incorporated settlements. According to the USGS, it contains four cemeteries: Abandoned Timber, Canby, Oakwood and Saint Josephs. References External links US-Counties.com City-Data.com Townships in Adair County, Iowa Townships in Iowa