Lely, FL has a population of 3,788 and is the 7,691st largest city in the United States. The population density is 2,764 per sq mi which is 842% higher than the Florida average and 2951% higher than the national average. The median age in Lely is 66 which is approximately 59% higher than the Florida average of 42. In Lely, 68% of the population over 15 years of age are married, 90% speak English and 5% speak Spanish. 11% of Lely residents were born in Florida, 81% were born out of state, 1% were born outside of the United States and 8% were foreign born.