Itasca, IL has a population of 8,502 and is the 4,458th largest city in the United States. The population density is 1,706 per sq mi which is 667% higher than the Illinois average and 1783% higher than the national average. The median age in Itasca is 41 which is approximately 10% higher than the Illinois average of 37. In Itasca, 64% of the population over 15 years of age are married, 76% speak English and 7% speak Spanish. 70% of Itasca residents were born in Illinois, 12% were born out of state, 1% were born outside of the United States and 16% were foreign born.