Lemon Grove, FL has a population of 730 and is the 17,203rd largest city in the United States. The population density is 24 per sq mi which is 92% lower than the Florida average and 73% lower than the national average. The median age in Lemon Grove is 31 which is approximately 26% lower than the Florida average of 42. In Lemon Grove, 61% of the population over 15 years of age are married, 70% speak English and 30% speak Spanish. 74% of Lemon Grove residents were born in Florida, 20% were born out of state, 4% were born outside of the United States and 2% were foreign born.