Holly Hill, FL has a population of 11,839 and is the 3,454th largest city in the United States. The population density is 2,990 per sq mi which is 918% higher than the Florida average and 3200% higher than the national average. The median age in Holly Hill is 44 which is approximately 7% higher than the Florida average of 42. In Holly Hill, 45% of the population over 15 years of age are married, 93% speak English and 4% speak Spanish. 40% of Holly Hill residents were born in Florida, 53% were born out of state, 2% were born outside of the United States and 5% were foreign born.