Thomasville, GA has a population of 18,706 and is the 2,334th largest city in the United States. The population density is 1,246 per sq mi which is 647% higher than the Georgia average and 1275% higher than the national average. The median age in Thomasville is 39 which is approximately 7% higher than the Georgia average of 36. In Thomasville, 52% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 69% of Thomasville residents were born in Georgia, 29% were born out of state, 1% were born outside of the United States and 1% were foreign born.