Marion is located in Illinois. Marion, Illinois has a population of 17,029. Marion is less family-centric than the surrounding county with 23% households with children. The county percentage for households with children is 25%.
The median household income in Marion, Illinois is $46,450. The median household income for the surrounding county is $54,246 compared to the national median of $66,222. The median age of people living in Marion is 40.1 years.
The average high temperature in July is 87.2 degrees, with an average low temperature in January of 19 degrees. The annual precipitation is 46.96.