Oto Township is a township in Woodbury County, Iowa, United States.[1] References [1]U.S. Geological Survey Geographic Names Information System: Oto Township, Woodbury County, Iowa 42.2546°N 95.8467°W / 42.2546; -95.8467 This article about the geography of Woodbury County, Iowa is a stub. You can help Wikipedia by expanding it.vteWikiwand - on Seamless Wikipedia browsing. On steroids.