Putnam County is a county located in the central portion of the U.S. state of Georgia. As of the 2020 census, the population was 22,047. The county seat is Eatonton. Since the early 21st century, the county has had a housing boom. It has proximity to Lake Oconee, Lake Sinclair, and the Oconee River, all of which are recreation sites, as well as to major e…Putnam County is a county located in the central portion of the U.S. state of Georgia. As of the 2020 census, the population was 22,047. The county seat is Eatonton. Since the early 21st century, the county has had a housing boom. It has proximity to Lake Oconee, Lake Sinclair, and the Oconee River, all of which are recreation sites, as well as to major employment centers such as Atlanta, Athens, and Macon.