Chicago, Illinois, is the 3rd largest city in the U.S.
Chicago, Illinois, is the 3rd largest city, measured by population, in the U.S. The last census estimate was 2,716,450, with more than 10 million in the metro area, a.k.a. Chicagoland.
Chicago is the birthplace of the skyscraper and is considered a highly respected architectural city.
Chicago was settled in 1780 and incorporated on March 4, 1837. The type of government is Mayor-council, the body is Chicago City Council.
Current Mayor of Chicago: Lori E. Lightfoot (D)
City Clerk: Anna Valencia (D)
City Treasurer: Kurt Summers Jr. (D)