Atlanta is an unincorporated community in the U.S. state of Michigan, along the 45th parallel. It is a census-designated place (CDP) for statistical purposes and does not have any legal status as an incorporated municipality. The population was 757 at the 2000 census. It is the county seat of Montmorency County.The community is centered on the junction between M-32 and M-33 at 45°00′17″N 84°08′38″W in the east-central portion of Briley Township.