Chicago

The Chicago metropolitan area, or Chicagoland as it is commonly called within the area, is the metropolitan area associated with the city of Chicago, Illinois and its suburbs. It is the area that is closely linked to the city through social, economic, and cultural ties. There are several definitions of the area, that being the definition by the United States census bureau, the area defined by the Office of Management and Budget (OMB) as the Chicago-Joliet-Naperville, IL-IN-WI Metropolitan Statistical Area (MSA), and the area under the jurisdiction of the Chicago Metropolitan Agency for Planning (a metropolitan planning organization). The metropolitan Chicago population (CSA) is over 9.8 million people.