Belleair Bluffs, FL has a population of 2,255 and is the 10,372nd largest city in the United States. The population density is 5,015 per sq mi which is 1608% higher than the Florida average and 5435% higher than the national average. The median age in Belleair Bluffs is 56 which is approximately 33% higher than the Florida average of 42. In Belleair Bluffs, 62% of the population over 15 years of age are married, 92% speak English and 2% speak Spanish. 21% of Belleair Bluffs residents were born in Florida, 67% were born out of state, 2% were born outside of the United States and 10% were foreign born.