Cassville is an unincorporated community in Howard Township, Howard County, Indiana, United States. It is part of the Kokomo, Indiana Metropolitan Statistical Area. History Originally named Pleasant Spring, Cassville was renamed in 1854 for Lewis Cass, a U.S. Senator from Michigan. Geography Cassville is located at on the border of Clay Township and Howard Township. Highway US-31 to South Bend (North) and Indianapolis (South) References Unincorporated communities in Howard County, Indiana Kokomo, Indiana metropolitan area Unincorporated communities in Indiana