St. Pete Beach, FL has a population of 9,528 and is the 4,084th largest city in the United States. The population density is 4,474 per sq mi which is 1424% higher than the Florida average and 4838% higher than the national average. The median age in St. Pete Beach is 57 which is approximately 37% higher than the Florida average of 42. In St. Pete Beach, 64% of the population over 15 years of age are married, 90% speak English and 2% speak Spanish. 21% of St. Pete Beach residents were born in Florida, 63% were born out of state, 2% were born outside of the United States and 14% were foreign born.