Manasota Key, FL has a population of 1,078 and is the 14,677th largest city in the United States. The population density is 1,031 per sq mi which is 251% higher than the Florida average and 1038% higher than the national average. The median age in Manasota Key is 72 which is approximately 73% higher than the Florida average of 42. In Manasota Key, 80% of the population over 15 years of age are married, 82% speak English and 2% speak Spanish. 6% of Manasota Key residents were born in Florida, 74% were born out of state, 1% were born outside of the United States and 19% were foreign born.