Jefferson County is a county located in the U.S. state of Indiana. As of 2018, the population was 32,208. The county seat is Madison.
Montgomery County is a county in the U.S. state of Indiana. As of the 2010 United States Census, the population was 38,124. The county seat is Crawfordsville. The county is divided into eleven townships which provide local services.Montgomery County comprises the Crawfordsville, IN Micropolitan Statistical Area.
Boone County is a county in the U.S. state of Indiana. As of 2010, the population was 56,640. The county seat (and the county's only incorporated city) is Lebanon. Indiana's center of population is located in eastern Boone County, just northwest of the town of Sheridan in neighboring Hamilton County.