South Jacksonville is located in Illinois. South Jacksonville, Illinois has a population of 3,302. South Jacksonville is more family-centric than the surrounding county with 27% households with children. The county percentage for households with children is 25%.
The median household income in South Jacksonville, Illinois is $55,517. The median household income for the surrounding county is $52,743 compared to the national median of $66,222. The median age of people living in South Jacksonville is 45.4 years.
The average high temperature in July is 87 degrees, with an average low temperature in January of 15 degrees. The annual precipitation is 38.47.