Orange County is located in southern Indiana in the United States. As of 2010, its population was 19,840, an increase of 2.8% from 19,306 in 2000. The county seat is Paoli. The county has four incorporated settlements with a total population of about 8,600, as well as several small unincorporated communities. It is divided into 10 townships which provide local services. One U.S.