Tennille, GA has a population of 1,649 and is the 12,148th largest city in the United States. The population density is 931 per sq mi which is 458% higher than the Georgia average and 928% higher than the national average. The median age in Tennille is 39 which is approximately 9% higher than the Georgia average of 36. In Tennille, 49% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 85% of Tennille residents were born in Georgia, 15% were born out of state, 0% were born outside of the United States and 0% were foreign born.