Melbourne, FL has a population of 78,911 and is the 439th largest city in the United States. The population density is 1,788 per sq mi which is 509% higher than the Florida average and 1874% higher than the national average. The median age in Melbourne is 46 which is approximately 10% higher than the Florida average of 42. In Melbourne, 50% of the population over 15 years of age are married, 87% speak English and 7% speak Spanish. 33% of Melbourne residents were born in Florida, 53% were born out of state, 3% were born outside of the United States and 11% were foreign born.