Chicago Metro Area is metropolitan area that includes the city of Chicago, Illinois, and its suburb
Ahh, one of my favourite cities on earth! I love Chicago. Great restaurants! 
It would shock you to know that it is the third largest metropolitan area in the United States.
Yes, it's a big, spread out city. Love that deep dish pizza.
It  generates  an annual gross regional product (GRP) of over $561 billion.
Interesting. The architecture is stunning. Some real beauties there.
region is home to more than 400 major corporate headquarters, including 31 in the Fortune 500. For six consecutive years, Chicagoland was ranked the nation's top metropolitan area for corporate relocations.
There are several definitions of the area, including the areas defined by the United States Office of Management and Budget (OMB) as the Chicago–Naperville-Elgin IL–IN–WI Metropolitan Statistical Area (MSA) and the slightly larger Combined Statistical Area, and the area under the jurisdiction of the Chicago Metropolitan Agency for Planning
Lakes.
According to the Brookings Institution, if it stood alone as a country, the Great Lakes economy would be one of the largest economic units on Earth (with a $4.5-trillion gross regional product). This region also contains what area urban planners call the Great Lakes Megalopolis, which has an estimated 59 million people. Chicago is emerging as the third megacity in the United States, after the New York City and Los Angeles metropolitan areas, with a metro population approaching ten million. Cities along the Great Lakes have