Williamsburg, FL has a population of 7,968 and is the 4,698th largest city in the United States. The population density is 2,234 per sq mi which is 661% higher than the Florida average and 2366% higher than the national average. The median age in Williamsburg is 44 which is approximately 5% higher than the Florida average of 42. In Williamsburg, 51% of the population over 15 years of age are married, 63% speak English and 23% speak Spanish. 19% of Williamsburg residents were born in Florida, 50% were born out of state, 9% were born outside of the United States and 22% were foreign born.