Clarksville is a town located in Clark County, Indiana, within the United States. Situated along the Ohio River, it functions as part of the Louisville Metropolitan area. As of the 2020 census, the town had a population of 22,333.
The town was founded in 1783 by George Rogers Clark at a site featuring the only seasonal rapids on the entire Ohio River. Due to its founding date and location, it is recognized as the oldest American town in the former Northwest Territory.
Clarksville is home to several notable landmarks, including the Colgate clock, which is one of the largest clocks in the world. Additionally, the area contains the Falls of the Ohio State Park, which features the world's largest exposed Devonian period fossil bed.