Atlanta, IN has a population of 826 and is the 16,377th largest city in the United States. The population density is 2,739 per sq mi which is 1426% higher than the Indiana average and 2923% higher than the national average. The median age in Atlanta is 37 which is approximately 2% lower than the Indiana average of 37. In Atlanta, 65% of the population over 15 years of age are married, 98% speak English and 2% speak Spanish. 81% of Atlanta residents were born in Indiana, 17% were born out of state, 1% were born outside of the United States and 2% were foreign born.