Odessa, FL has a population of 7,859 and is the 4,765th largest city in the United States. The population density is 1,465 per sq mi which is 257% higher than the Florida average and 1517% higher than the national average. The median age in Odessa is 38 which is approximately 8% lower than the Florida average of 42. In Odessa, 61% of the population over 15 years of age are married, 81% speak English and 11% speak Spanish. 45% of Odessa residents were born in Florida, 41% were born out of state, 4% were born outside of the United States and 10% were foreign born.