West Holman Township is a township in Poweshiek County, Iowa, USA.[1] References [1]U.S. Geological Survey Geographic Names Information System: Jefferson Township, Poweshiek County, Iowa 41°49′N 92°21′W This article about the geography of Poweshiek County, Iowa is a stub. You can help Wikipedia by expanding it.vteWikiwand - on Seamless Wikipedia browsing. On steroids.