South Wilmington is located in Illinois. South Wilmington, Illinois has a population of 565. South Wilmington is less family-centric than the surrounding county with 24% households with children. The county percentage for households with children is 33%.
The median household income in South Wilmington, Illinois is $78,406. The median household income for the surrounding county is $79,417 compared to the national median of $66,222. The median age of people living in South Wilmington is 42.6 years.
The average high temperature in July is 83.7 degrees, with an average low temperature in January of 12.4 degrees. The annual precipitation is 34.61.