Joliet is a city in Will and Kendall Counties in the U.S. state of Illinois, located 40 miles (64 km) southwest of Chicago. It is the county seat of Will County. As of the 2010 census, the city was the fourth-most populated in Illinois, with a population of 147,433. It continues to be Illinois' fastest growing city and one of the fastest growing in the southwest Chicago metropolitan area. When Joliet was first planned in the early 1870s, it was still in Cook County. In 1886, it became the county seat of the new Will County.

Joliet is a Des Plaines River town, with the downtown located in the river valley. This is especially evident on Interstate 80 if one is coming from the east or the west where it has been flat for many miles and suddenly the land drops as you approach the river. This offers a great view looking north to see downtown Joliet. For most of its existence Joliet geographically has had its "west side" and "east side", referring to areas to the west or the east of the Des Plaines River, which runs through the city.

en.wikipedia.org/wiki/Joliet,_Illinois