Madeira Beach, FL has a population of 4,343 and is the 7,070th largest city in the United States. The population density is 4,413 per sq mi which is 1403% higher than the Florida average and 4771% higher than the national average. The median age in Madeira Beach is 58 which is approximately 39% higher than the Florida average of 42. In Madeira Beach, 56% of the population over 15 years of age are married, 90% speak English and 5% speak Spanish. 21% of Madeira Beach residents were born in Florida, 66% were born out of state, 3% were born outside of the United States and 10% were foreign born.