Ohio County had its beginnings with the formation of Dearborn County by Indiana Territorial Governor William Henry Harrison in 1803, thirteen years before Indiana became a state. The new county included territory now comprising Ripley, Franklin and Ohio Counties. Harrison made Lawrenceburg the county seat at that time. In 1811 Harrison separated Franklin County from Dearborn County. The Indiana General Assembly detached and created Ripley County in 1818. Continue reading Podcast – A Thumbnail History of Ohio County, Indiana