Tinley Park is a village in Cook County, Illinois, United States, and is a suburb of Chicago. Per the 2020 census, the population was 55,971, and it is among the fastest-growing suburbs southwest of Chicago. In 2009, BusinessWeek named Tinley Park the "best place in America" to raise a family.

Will County is a county in the northeastern part of the state of Illinois. According to the 2020 census, it had a population of 696,355, an increase of 2.8% from 677,560 in 2010, making it Illinois's fourth-most populous county. The county seat is Joliet. Will County is one of the five collar counties of the Chicago–Naperville–Elgin, IL–IN–WI Metropolitan Statistical Area. The portion of Will County around Joliet uses area codes 815 and 779, while 630 and 331 are for far northern Will County and 708 is for central and eastern Will County.