Sears Tower Chicago Observation Deck

Chicago is the most populous city in the U.S. state of Illinois and in the Midwestern United States. With a population of 2,746,388, as of the …
Chicago is the most populous city in the U.S. state of Illinois and in the Midwestern United States. With a population of 2,746,388, as of the 2020 census, it is the third-most populous city in the United States after New York City and Los Angeles. As the seat of Cook County, the second-most populous county in the U.S., Chicago is the center of the Chicago metropolitan area, often colloquially called "Chicagoland" and home to 9.6 million residents.
  • Country: United States
  • State: Illinois
  • Settled: c. 1780
  • Founded by: Jean Baptiste Point du Sable
  • Area codes: 312, 773, 872
  • Counties: Cook (majority) and DuPage (minority)
  • Incorporated (town): August 12, 1833

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Data from: en.wikipedia.org