Elburn, IL has a population of 5,594 and is the 6,014th largest city in the United States. The population density is 1,791 per sq mi which is 706% higher than the Illinois average and 1877% higher than the national average. The median age in Elburn is 41 which is approximately 9% higher than the Illinois average of 37. In Elburn, 68% of the population over 15 years of age are married, 96% speak English and 3% speak Spanish. 81% of Elburn residents were born in Illinois, 15% were born out of state, 0% were born outside of the United States and 4% were foreign born.