Matteson, IL has a population of 19,146 and is the 2,269th largest city in the United States. The population density is 2,058 per sq mi which is 826% higher than the Illinois average and 2172% higher than the national average. The median age in Matteson is 39 which is approximately 4% higher than the Illinois average of 37. In Matteson, 58% of the population over 15 years of age are married, 91% speak English and 3% speak Spanish. 79% of Matteson residents were born in Illinois, 17% were born out of state, 0% were born outside of the United States and 4% were foreign born.