Description & Facts: Chicagoland is an informal name for the Chicago metro area, used primarily by copywriters, advertising agencies, and traffic reporters. There is no precise definition for the term Chicagoland, but it generally means around Chicago or relatively local. The Chicago Tribune, which coined the term, includes the city of Chicago, the rest of Cook County, eight nearby Illinois counties; Lake, McHenry, DuPage, Kane, Kendall, Grundy, Will and Kankakee, and three counties in Indiana; Lake, Porter, and LaPorte. The Illinois Department of Tourism defines Chicagoland as Cook County without the city of Chicago, and only Lake, DuPage, Kane and Will counties. The Chicagoland Chamber of Commerce defines it as all of Cook, and DuPage, Kane, Lake, McHenry and Will counties.