Aurora, a suburb of Chicago, is a city predominantly in Kane County and DuPage County, with portions extending into Kendall and Will counties. It is in the outer region of Chicago metropolitan area in the U.S. state of Illinois. It is the second m...

Joliet ( or ) is a city in Kendall and Will counties in the U.S. state of Illinois, 30 miles (48 km) southwest of Chicago. It is the county seat of Will County and part of southwest Chicagoland. At the 2010 census, the city was the fourth largest ...

Naperville () is a city in DuPage and Will counties in the U.S. state of Illinois, and a suburb of Chicago. In a 2010 study assessing cities with populations exceeding 75,000, Naperville was ranked as the wealthiest city in the Midwest and the ele...

Rockford is the third largest city in the U.S. state of Illinois, the 171st most populous city in the United States, the largest city in Illinois outside the Chicago metropolitan area, and the city of the 148th most populous metropolitan area in t...

Springfield is the capital of the U.S. state of Illinois and the county seat of Sangamon County. The city's population of 116,250 as of the 2010 U.S. Census makes it the state's sixth most populous city. It is the largest city in central Illinois....