Oviedo, FL has a population of 37,545 and is the 1,108th largest city in the United States. The population density is 2,440 per sq mi which is 731% higher than the Florida average and 2593% higher than the national average. The median age in Oviedo is 35 which is approximately 15% lower than the Florida average of 42. In Oviedo, 57% of the population over 15 years of age are married, 79% speak English and 14% speak Spanish. 35% of Oviedo residents were born in Florida, 48% were born out of state, 4% were born outside of the United States and 12% were foreign born.