Senoia, GA has a population of 3,889 and is the 7,571st largest city in the United States. The population density is 675 per sq mi which is 261% higher than the Georgia average and 646% higher than the national average. The median age in Senoia is 31 which is approximately 14% lower than the Georgia average of 36. In Senoia, 68% of the population over 15 years of age are married, 93% speak English and 5% speak Spanish. 45% of Senoia residents were born in Georgia, 49% were born out of state, 2% were born outside of the United States and 4% were foreign born.