Allentown, FL has a population of 1,143 and is the 14,331st largest city in the United States. The population density is 38 per sq mi which is 87% lower than the Florida average and 58% lower than the national average. The median age in Allentown is 44 which is approximately 6% higher than the Florida average of 42. In Allentown, 73% of the population over 15 years of age are married, 97% speak English and 2% speak Spanish. 49% of Allentown residents were born in Florida, 47% were born out of state, 3% were born outside of the United States and 1% were foreign born.