Richmond Hill, GA has a population of 11,501 and is the 3,536th largest city in the United States. The population density is 725 per sq mi which is 334% higher than the Georgia average and 700% higher than the national average. The median age in Richmond Hill is 31 which is approximately 14% lower than the Georgia average of 36. In Richmond Hill, 64% of the population over 15 years of age are married, 88% speak English and 7% speak Spanish. 40% of Richmond Hill residents were born in Georgia, 50% were born out of state, 3% were born outside of the United States and 8% were foreign born.