Brownsville, FL has a population of 15,860 and is the 2,697th largest city in the United States. The population density is 6,958 per sq mi which is 2270% higher than the Florida average and 7580% higher than the national average. The median age in Brownsville is 36 which is approximately 13% lower than the Florida average of 42. In Brownsville, 30% of the population over 15 years of age are married, 67% speak English and 31% speak Spanish. 61% of Brownsville residents were born in Florida, 14% were born out of state, 4% were born outside of the United States and 21% were foreign born.