The Chicago Metropolitan Area, often referred to as the Chicago Metro, is a densely populated region in the state of Illinois. It includes the city of Chicago and its surrounding suburbs, extending into parts of Indiana and Wisconsin. This area is known for its diverse economy, cultural institutions, and significant transportation networks. Home to over 9 million residents, the Chicago Metro is one of the largest metropolitan areas in the United States. It features various attractions, including the Art Institute of Chicago, Millennium Park, and the iconic Willis Tower. The region is also recognized for its contributions to music, particularly blues and jazz.