Illinois is a state in the Midwestern United States. The Great Lakes are to its northeast, the Mississippi River to its west, and the Wabash and Ohio rivers to its south. Its largest metropolitan areas are Chicago and the Metro East region of Greater St. Louis. Other metropolitan areas include Peoria and Rockford, as well as Springfield, its capital, and Champaign-Urbana, home to the main campus of the state's flagship university.