Clay Township, Washington County, Iowa From Wikipedia, the free encyclopedia Township in Washington County, Iowa, U.S. Clay Township is a township in Washington County, Iowa, United States.[1] Clay Township was established in 1844.[2] References ↑ U.S. Geological Survey Geographic Names Information System: Clay Township, Washington County, Iowa ↑ The History of Washington County, Iowa: Its Cities, Towns, Etc. Union Historical Company. 1880. pp. 569. vteMunicipalities and communities of Washington County, Iowa, United StatesCounty seat: WashingtonCities Ainsworth Brighton Coppock‡ Crawfordsville Kalona Keota‡ Riverside Washington Wellman West Chester Map of Iowa highlighting Washington CountyTownships Brighton Cedar Clay Crawford Dutch Creek English River Franklin Highland Iowa Jackson Lime Creek Marion Oregon Seventy-Six Washington Unincorporatedcommunities Haskins Noble Rubio Verdi Footnotes‡This populated place also has portions in an adjacent county or counties Iowa portal United States portal 41°12′12″N 91°53′24″W / 41.2033°N 91.8900°W / 41.2033; -91.8900 This article about the geography of Washington County, Iowa is a stub. You can help Wikipedia by adding missing information.vte Related Articles