Decatur County is a county located in the U.S. state of Georgia. As of the 2020 census, the population was 29,367. The county seat is Bainbridge.

Bainbridge is a city in Decatur County, Georgia, United States. The city is the county seat of Decatur County. As of the 2020 census, the city had a population of 14,468, up from 12,697 at the 2010 census. It is the principal city of the Bainbridge, Georgia Micropolitan Statistical Area and a principal city in the Tallahassee—Bainbridge, FL-GA Combined Statistical Area.