Matherville, IL has a population of 853 and is the 16,158th largest city in the United States. The population density is 2,182 per sq mi which is 881% higher than the Illinois average and 2308% higher than the national average. The median age in Matherville is 39 which is approximately 3% higher than the Illinois average of 37. In Matherville, 64% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 77% of Matherville residents were born in Illinois, 21% were born out of state, 1% were born outside of the United States and 1% were foreign born.