Gateway, FL has a population of 9,699 and is the 4,025th largest city in the United States. The population density is 1,729 per sq mi which is 322% higher than the Florida average and 1808% higher than the national average. The median age in Gateway is 42 which is approximately 2% higher than the Florida average of 42. In Gateway, 57% of the population over 15 years of age are married, 88% speak English and 6% speak Spanish. 20% of Gateway residents were born in Florida, 66% were born out of state, 1% were born outside of the United States and 13% were foreign born.