Atlanta is a town in Jackson Township, Hamilton County, Indiana, United States. The population was 725 at the 2010 census.
Atlanta is located at 40°12′50″N 86°1′32″W / 40.21389°N 86.02556°W / 40.21389; -86.02556 (40.213954, -86.025498).
According to the United States Census Bureau, the town has a total area of 0.3 square miles (0.8 km²), all of it land. The town is noted throughout the area for the Atlanta New Earth Festival, held on the fourth weekend of September annually since 1973.