Locust Grove, GA has a population of 5,742 and is the 5,919th largest city in the United States. The population density is 515 per sq mi which is 176% higher than the Georgia average and 469% higher than the national average. The median age in Locust Grove is 32 which is approximately 11% lower than the Georgia average of 36. In Locust Grove, 50% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 67% of Locust Grove residents were born in Georgia, 27% were born out of state, 1% were born outside of the United States and 5% were foreign born.