Greenfield Township is one of the sixteen townships of Warren County, Iowa, United States.PlaceNames.com , Greenfield, Township ofHistopolis, Warren County, Iowa, United States Its estimated population as of 2008 is 5,773 people, with a density of .City-Data.com, Greenfield township, Warren County, Iowa (IA) Three cities have land in Greenfield (Norwalk, Spring Hill, and Des Moines—the state capital), as well as two unincorporated areas (Greenbush and Scotch Ridge). The township has two cemeteries (Webb Cemetery and North Ridge).Histopolis Greenfield Township, Warren County, Iowa, United States
Geography At an elevation of , Greenfield Township covers an area of . The North River, a tributary of the Des Moines River, passes through Greenfield Township.Iowa Geological Survey Annual Report: Vol. 5, p. 301–360 (1895), "Geology of Warren County" by J.L. Tilton
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