Gillespie is located in Illinois. Gillespie, Illinois 62033 has population of 3,145. Gillespie 62033 is less family-centric than the surrounding county with 25% of the households with children.
The median household income in Gillespie, Illinois 62033 is $43,881. The median household income for the surrounding county is $56,452 compared to the national median of $66,222. The median age of people living in Gillespie 62033 is 40 years.
The average high temperature in July is 87.3 degrees, with an average low temperature in January of 17.4 degrees. The annual precipitation is 38.73.