Leesburg, FL has a population of 21,570 and is the 2,015th largest city in the United States. The population density is 669 per sq mi which is 128% higher than the Florida average and 638% higher than the national average. The median age in Leesburg is 38 which is approximately 9% lower than the Florida average of 42. In Leesburg, 53% of the population over 15 years of age are married, 91% speak English and 7% speak Spanish. 43% of Leesburg residents were born in Florida, 47% were born out of state, 3% were born outside of the United States and 7% were foreign born.