Chicago is the largest city by population in the state of Illinois and the Midwest, and a dominant center of finance, industry and culture in the region. The city was long the "second city" (second in population to New York), and is currently the third-most populous city in the United States, with nearly 3 million people. The Chicago metropolitan area (commonly referred to as Chicagoland) has a population of over 9.7 million people in Illinois, Wisconsin and Indiana, making it also the third largest metropolitan area in the U.S. Adjacent to Lake Michigan, it is among the world's twenty-five largest urban areas by population. Loughborough University classifies Chicago as an alpha world city for its worldwide economic influence.
(from wikipedia)
(from wikipedia)