Lyons, IL has a population of 10,571 and is the 3,782nd largest city in the United States. The population density is 4,836 per sq mi which is 2076% higher than the Illinois average and 5238% higher than the national average. The median age in Lyons is 36 which is approximately 5% lower than the Illinois average of 37. In Lyons, 49% of the population over 15 years of age are married, 56% speak English and 31% speak Spanish. 69% of Lyons residents were born in Illinois, 9% were born out of state, 1% were born outside of the United States and 21% were foreign born.