Sullivan is located in Illinois. Sullivan, Illinois 61951has a population of 4,347. Sullivan 61951 is less family-centric than the surrounding county with 27% households with children. The county percentage for households with children is 29%.
The median household income in Sullivan, Illinois 61951 is $59,693. The median household income for the surrounding county is $62,913 compared to the national median of $66,222. The median age of people living in Sullivan 61951 is 41.7 years.
The average high temperature in July is 86.9 degrees, with an average low temperature in January of 18.9 degrees. The annual precipitation is 39.14.