Maryville is located in Illinois. Maryville, Illinois has a population of 7,814. Maryville is less family-centric than the surrounding county with 25% households with children. The county percentage for households with children is 28%.
The median household income in Maryville, Illinois is $80,439. The median household income for the surrounding county is $63,321 compared to the national median of $66,222. The median age of people living in Maryville is 42.4 years.
The average high temperature in July is 88.93 degrees, with an average low temperature in January of 20.9 degrees. The annual precipitation is 40.21.