Key Vista, FL has a population of 1,666 and is the 12,093rd largest city in the United States. The population density is 2,196 per sq mi which is 648% higher than the Florida average and 2324% higher than the national average. The median age in Key Vista is 50 which is approximately 20% higher than the Florida average of 42. In Key Vista, 79% of the population over 15 years of age are married, 82% speak English and 4% speak Spanish. 31% of Key Vista residents were born in Florida, 50% were born out of state, 5% were born outside of the United States and 14% were foreign born.