Gillespie is located in Illinois. Gillespie, Illinois has a population of 3,183. Gillespie is less family-centric than the surrounding county with 20.04% of the households containing married families with children. The county average for households married with children is 29.19%.
The median household income in Gillespie, Illinois is $40,236. The median household income for the surrounding county is $53,890 compared to the national median of $57,652. The median age of people living in Gillespie is 43.4 years.
The average high temperature in July is 87 degrees, with an average low temperature in January of 19.7 degrees. The average rainfall is approximately 40 inches per year, with 17.1 inches of snow per year.
