Chattooga County is a county in the Northwest region of the U.S. state of Georgia. As of the 2020 census, the population was 24,965. The county seat is Summerville. The county was created on December 28, 1838. Chattooga County comprises the Summerville, GA Micropolitan Statistical Area, which is included in the Rome-Summerville Combined Statistical Area. Summerville is the site of the Chattooga County Courthouse.