Franklin County is a county on the eastern border of the U.S. state of Indiana. In the 2020 United States Census, the county population was 22,785. The county seat is the town of Brookville. Franklin County is part of the Cincinnati, OH–KY–IN Metropolitan Statistical Area. The only incorporated city in Franklin County is Batesville, which lies mostly in adjoining Ripley County.

Brookville is a town in Brookville Township, Franklin County, Indiana, United States. The town is the county seat of and the largest community entirely within Franklin County. The population was 2,596 at the 2010 census.