Lithia Springs, GA has a population of 17,743 and is the 2,439th largest city in the United States. The population density is 1,304 per sq mi which is 681% higher than the Georgia average and 1339% higher than the national average. The median age in Lithia Springs is 34 which is approximately 7% lower than the Georgia average of 36. In Lithia Springs, 43% of the population over 15 years of age are married, 77% speak English and 21% speak Spanish. 49% of Lithia Springs residents were born in Georgia, 36% were born out of state, 1% were born outside of the United States and 13% were foreign born.