Sweetwater, FL has a population of 20,718 and is the 2,091st largest city in the United States. The population density is 9,123 per sq mi which is 3007% higher than the Florida average and 9969% higher than the national average. The median age in Sweetwater is 41 which is approximately equal to the Florida average of 42. In Sweetwater, 46% of the population over 15 years of age are married, 4% speak English and 95% speak Spanish. 20% of Sweetwater residents were born in Florida, 4% were born out of state, 2% were born outside of the United States and 75% were foreign born.