Cinco Bayou, FL has a population of 374 and is the 21,254th largest city in the United States. The population density is 2,147 per sq mi which is 631% higher than the Florida average and 2269% higher than the national average. The median age in Cinco Bayou is 37 which is approximately 11% lower than the Florida average of 42. In Cinco Bayou, 45% of the population over 15 years of age are married, 93% speak English and 3% speak Spanish. 22% of Cinco Bayou residents were born in Florida, 70% were born out of state, 3% were born outside of the United States and 5% were foreign born.