Chicago is the third most
populous city in the United States, after New York City and Los Angeles. With
2.7 million residents, it is the most populous city in both the U.S. state
of Illinois and the American Midwest. Its metropolitan area, sometimes called Chicagoland, is home to
9.5 million people and is the third-largest in the United States. Chicago
is the seat of Cook County, although a small part of the city extends into
DuPage County.
Chicago was incorporated as a city
