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Chicago

Most populous city in Illinois, US

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Chicago is the most populous city in the U.S. state of Illinois and in the Midwestern United States. Located on the western shore of Lake Michigan, it is the third-most populous city in the United States, with a population of 2.74 million at the 2020 census. The Chicago metropolitan area has approximately 9.62 million residents according to the 2020 census and is the third-largest metropolitan statistical area in the country and part of the fourth-largest combined statistical area in the United States, spanning 19 counties in three states and with a population of nearly 10 million. Chicago is the county seat of Cook County, the second-most populous county in the U.S.

Chicago was incorporated as a city in 1837 near a portage between the Great Lakes and the Mississippi River watershed. It grew rapidly in the mid-19th century. In 1871, the Great Chicago Fire destroyed several square miles and left more than 100,000 homeless, but Chicago's population continued to grow. Chicago made noted contributions to urban planning and architecture, such as the Chicago School, the development of the City Beautiful movement, and the steel-framed skyscraper.

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More about Chicago

Chicago is the most populous city in the U.S. state of Illinois and in the Midwestern United States. Located on the western shore of Lake Michigan, it is the third-most populous city in the United States, with a population of 2.74 million at the 2020 census. The Chicago metropolitan area has approximately 9.62 million residents according to the 2020 census and is the third-largest metropolitan statistical area in the country and part of the fourth-largest combined statistical area in the United States, spanning 19 counties in three states and with a population of nearly 10 million. Chicago is the county seat of Cook County, the second-most populous county in the U.S.

Chicago was incorporated as a city in 1837 near a portage between the Great Lakes and the Mississippi River watershed. It grew rapidly in the mid-19th century. In 1871, the Great Chicago Fire destroyed several square miles and left more than 100,000 homeless, but Chicago's population continued to grow. Chicago made noted contributions to urban planning and architecture, such as the Chicago School, the development of the City Beautiful movement, and the steel-framed skyscraper.

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When to go

29°16°Jan6d
33°20°Feb6d
52°35°Mar11d
57°42°Apr9d
63°49°May9d
81°64°Jun11d
83°70°Jul15d
79°67°Aug6d
75°61°Sep5d
64°52°Oct6d
48°37°Nov9d
33°21°Dec12d

Average highs and lows (°F) and days with rain or snow, from last year’s weather. Best months are highlighted.

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Photos from Unsplash, Wikipedia and Wikimedia Commons (CC BY-SA); facts from Wikipedia; maps © OpenStreetMap contributors, weather from Open-Meteo. Huginn’s tips are AI-written — check prices, hours and entry rules before you go.