Suwanee, GA has a population of 18,001 and is the 2,405th largest city in the United States. The population density is 1,655 per sq mi which is 891% higher than the Georgia average and 1727% higher than the national average. The median age in Suwanee is 37 which is approximately 1% higher than the Georgia average of 36. In Suwanee, 64% of the population over 15 years of age are married, 76% speak English and 9% speak Spanish. 36% of Suwanee residents were born in Georgia, 45% were born out of state, 1% were born outside of the United States and 18% were foreign born.