Union Park, FL has a population of 10,623 and is the 3,768th largest city in the United States. The population density is 3,720 per sq mi which is 1167% higher than the Florida average and 4006% higher than the national average. The median age in Union Park is 31 which is approximately 26% lower than the Florida average of 42. In Union Park, 42% of the population over 15 years of age are married, 60% speak English and 32% speak Spanish. 40% of Union Park residents were born in Florida, 34% were born out of state, 13% were born outside of the United States and 13% were foreign born.