Gillespie is a village located in Macoupin County, in the state of Illinois (IL), United States. Nestled in the East North Central division of the Midwest region, it covers an area of 0.3 square miles (1.0 km²) and sits at an elevation of 660 ft. With a population of approximately 234 residents, Gillespie offers a peaceful, rural atmosphere.
The town's population is composed of about 52.14% males and 47.86% females, and it has a population density of 731.25 people per square mile (282.34/km²). Gillespie lies at a latitude of 39.14 and a longitude of -89.81, operating in the UTC-6.
Locals reflect a blend of American ancestry, with roots primarily in United States (0%), followed by English (8.1%), German (30.3%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 62033.