Grant Park, Illinois Area Code
Grant Park, IL is officially utilizing an area code overlay in which area codes 779 and 815 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.
In addition to Grant Park, IL area code information read more about area codes 779 and 815 details and Illinois area codes.
Grant Park, IL is located in Kankakee County and observes the Central Time Zone.
View our Times by Area Code tool.