Mableton, GA has a population of 38,839 and is the 1,071st largest city in the United States. The population density is 1,889 per sq mi which is 1032% higher than the Georgia average and 1985% higher than the national average. The median age in Mableton is 36 which is approximately 1% lower than the Georgia average of 36. In Mableton, 53% of the population over 15 years of age are married, 74% speak English and 18% speak Spanish. 45% of Mableton residents were born in Georgia, 35% were born out of state, 2% were born outside of the United States and 19% were foreign born.