Summerset Township is one of seventeen townships in Adair County, Iowa, USA. At the 2010 census, its population was 996. History Summerset Township was organized in 1856. Geography Summerset Township covers an area of and contains one incorporated settlement, Fontanelle. According to the USGS, it contains one cemetery, Fontanelle. 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