Bolingbrook is a village in Will and DuPage counties in the U.S. state of Illinois. It is a southwest suburb of Chicago on I-55 and Historic Route 66 (Frontage Road). The village was a new town built on the Gateway Wetlands west of the Des Plaines River in the 1960s. Bolingbrook experienced rapid growth in the 1980s and 1990s, eventually becoming Will county's second largest town after Joliet. Per the 2020 census, the population was 73,922. As of 2010, it is the 17th largest incorporated place in Illinois and the state's second-largest village.