Summit Township is one of seventeen townships in Adair County, Iowa, USA. At the 2010 census, its population was 967. History Summit Township was organized in 1871. Summit is named from the ridge it contains that forms the watershed between the Mississippi and Missouri rivers. Geography Summit Township covers an area of and contains one incorporated settlement, Adair. According to the USGS, it contains two cemeteries: Saint Johns and Sunny Hill. References External links US-Counties.com City-Data.com Townships in Adair County, Iowa Townships in Iowa 1871 establishments in Iowa Populated places established in 1871