Boynton Beach, FL has a population of 72,748 and is the 495th largest city in the United States. The population density is 4,509 per sq mi which is 1436% higher than the Florida average and 4877% higher than the national average. The median age in Boynton Beach is 43 which is approximately 3% higher than the Florida average of 42. In Boynton Beach, 50% of the population over 15 years of age are married, 70% speak English and 12% speak Spanish. 32% of Boynton Beach residents were born in Florida, 42% were born out of state, 3% were born outside of the United States and 23% were foreign born.