Gillespie is located in Illinois. Gillespie, Illinois has a population of 2,945. Gillespie is less family-centric than the surrounding county with 22.62% of the households containing married families with children. The county average for households married with children is 25.51%.
The median household income in Gillespie, Illinois is $45,817. The median household income for the surrounding county is $58,227 compared to the national median of $69,021. The median age of people living in Gillespie is 45.7 years.
The average high temperature in July is 87.5 degrees, with an average low temperature in January of 20.3 degrees. The average rainfall is approximately 39.9 inches per year, with 16 inches of snow per year.
