Walnut Grove, GA has a population of 1,181 and is the 14,135th largest city in the United States. The population density is 387 per sq mi which is 132% higher than the Georgia average and 327% higher than the national average. The median age in Walnut Grove is 37 which is approximately 2% higher than the Georgia average of 36. In Walnut Grove, 53% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 75% of Walnut Grove residents were born in Georgia, 24% were born out of state, 1% were born outside of the United States and 0% were foreign born.