Duluth, GA has a population of 28,681 and is the 1,495th largest city in the United States. The population density is 2,828 per sq mi which is 1594% higher than the Georgia average and 3022% higher than the national average. The median age in Duluth is 38 which is approximately 4% higher than the Georgia average of 36. In Duluth, 56% of the population over 15 years of age are married, 65% speak English and 9% speak Spanish. 30% of Duluth residents were born in Georgia, 39% were born out of state, 2% were born outside of the United States and 29% were foreign born.