Joliet is a city in the U.S. state of Illinois, 40 miles (64 km) southwest of Chicago.At the 2010 census, the city was the fourth largest in Illinois, with a population of 147,433.
The origin of the name was most likely a corruption of the name of French Canadian explorer Louis Jolliet, who in 1673, along with Father Jacques Marquette, paddled up the Des Plaines River and camped on a huge mound, a few miles south of present-day Joliet. In 1845, local residents changed the community's name from "Juliet" to "Joliet". Joliet was reincorporated as a city in 1852. Cornelius Cohenhoven Van Horne was active in getting the city its first charter, and because of this he was elected Joliet's first Mayor.