Elfers, FL has a population of 13,375 and is the 3,125th largest city in the United States. The population density is 3,775 per sq mi which is 1186% higher than the Florida average and 4067% higher than the national average. The median age in Elfers is 43 which is approximately 3% higher than the Florida average of 42. In Elfers, 59% of the population over 15 years of age are married, 85% speak English and 9% speak Spanish. 30% of Elfers residents were born in Florida, 58% were born out of state, 2% were born outside of the United States and 10% were foreign born.