Clewiston, FL has a population of 7,343 and is the 5,007th largest city in the United States. The population density is 1,564 per sq mi which is 433% higher than the Florida average and 1626% higher than the national average. The median age in Clewiston is 37 which is approximately 12% lower than the Florida average of 42. In Clewiston, 51% of the population over 15 years of age are married, 53% speak English and 43% speak Spanish. 54% of Clewiston residents were born in Florida, 15% were born out of state, 4% were born outside of the United States and 27% were foreign born.