Ohio is a state in the Midwestern United States. Ohio is the 34th largest, the 7th most populous, and the 10th most densely populated of the 50 United States. The state's capital and largest city is Columbus. Wikipedia

Clarksville is a city in and the county seat of Montgomery County, Tennessee, and the fifth-largest city in the state behind Memphis, Nashville, Knoxville, and Chattanooga, respectively. The city had a population of 132,957 at the 2010 census, and an estimated population of 142,519 in 2012. Wikipedia