Southgate, FL has a population of 7,114 and is the 5,127th largest city in the United States. The population density is 3,595 per sq mi which is 777% higher than the Florida average and 3868% higher than the national average. The median age in Southgate is 51 which is approximately 22% higher than the Florida average of 42. In Southgate, 53% of the population over 15 years of age are married, 87% speak English and 8% speak Spanish. 25% of Southgate residents were born in Florida, 59% were born out of state, 2% were born outside of the United States and 13% were foreign born.