City of Chicago — LLMpedia

City of Chicago
Name	City of Chicago
Settlement type	City
Nickname	"The Windy City", "Chi-Town", "The Second City", "City of the Big Shoulders"
Motto	Urbs in Horto (City in a Garden)
Subdivision type	Country
Subdivision name	United States
Subdivision type1	State
Subdivision name1	Illinois
Subdivision type2	Counties
Subdivision name2	Cook, DuPage
Established title	Incorporated (city)
Established date	March 4, 1837
Founder	Jean Baptiste Point du Sable
Government type	Mayor–council
Leader title	Mayor
Leader name	Brandon Johnson
Leader title1	City Council
Leader name1	Chicago City Council
Area total km2	606.42
Area total sq mi	234.14
Area land km2	588.67
Area land sq mi	227.27
Area water km2	17.75
Area water sq mi	6.85
Elevation ft	597
Elevation m	182
Population total	2,746,388
Population as of	2020
Population density km2	4,660.5
Population density sq mi	12,059.8
Population metro	9,618,502 (Chicago metropolitan area)
Timezone	CST
Utc offset	−6
Timezone DST	CDT
Utc offset DST	−5
Postal code type	ZIP Codes
Postal code	606xx, 607xx, 608xx
Area code	312, 773, 872
Blank name	FIPS code
Blank info	17-14000
Blank1 name	GNIS feature ID
Blank1 info	0428803
Website	www.chicago.gov

Contents

History
Geography
Demographics
Economy
Culture
Government and politics

City of Chicago. Located on the southwestern shore of Lake Michigan, it is the most populous city in the state of Illinois and the third-most populous in the United States. A global hub for finance, culture, commerce, industry, education, and transportation, its growth was historically fueled by its strategic position as a rail and water transit center, epitomized by the Chicago River and the Port of Chicago.

History

The area's first permanent non-indigenous settler was Jean Baptiste Point du Sable, a trader of African descent, in the 1780s. Incorporated as a city in 1837, its explosive growth was driven by the expansion of the Illinois and Michigan Canal and the Galena and Chicago Union Railroad, making it a critical national transportation nexus. The Great Chicago Fire of 1871 devastated the city but led to a pioneering era of architectural innovation, including the world's first skyscraper, the Home Insurance Building. The late 19th and early 20th centuries saw immense industrial expansion, major labor conflicts like the Haymarket affair, and significant cultural contributions during the Prohibition era, closely associated with figures like Al Capone. The city hosted the World's Columbian Exposition in 1893 and the Century of Progress world's fair in 1933-34, cementing its international profile.

Geography

The city's terrain is predominantly flat, built on glacial plain, with an elevation averaging about 579 feet above sea level. Its extensive waterfront along Lake Michigan features major public spaces like Grant Park and Lincoln Park. The Chicago River, historically crucial for trade, was famously reversed in 1900 by the Chicago Sanitary and Ship Canal to protect the lake's water supply. The city is divided into numerous community areas, with a central business district known as the Loop, named for the elevated 'L' train tracks that encircle it. Major geographic additions include Northerly Island, created for the 1933 fair, and extensive landfill projects that expanded the shoreline.

Demographics

As of the 2020 United States census, the city proper had a population of approximately 2.7 million, with a diverse racial and ethnic composition including significant African American, Hispanic or Latino (particularly of Mexican and Puerto Rican descent), Polish, Irish, and German communities. Historically a major destination during the Great Migration, the city has notable cultural enclaves such as Chinatown, Pilsen, and Andersonville. Religious institutions like the Archdiocese of Chicago and the Metropolitan Missionary Baptist Church reflect this diversity. Population shifts in recent decades have included growth in the downtown area and changes in historically dominant neighborhoods like Austin and South Shore.

Economy

A leading global financial center, it houses major exchanges like the Chicago Board Options Exchange and the Chicago Mercantile Exchange. The city is a headquarters for numerous Fortune 500 companies, including Boeing, United Airlines Holdings, and Conagra Brands. Key economic sectors include advanced manufacturing, particularly of food processing and metalworking equipment, professional services, and information technology. O'Hare International Airport is consistently one of the world's busiest airports, and the city remains a top national hub for rail freight, handled by companies like BNSF Railway. Major commercial corridors include Michigan Avenue and the revitalized Fulton Market District.

Culture

The city is renowned for its architectural legacy, with landmark buildings by Louis Sullivan, Frank Lloyd Wright, and Ludwig Mies van der Rohe, and tours led by the Chicago Architecture Foundation. It is the birthplace of the modern skyscraper and the Chicago School. Musical contributions are profound, originating Chicago blues, house music, and influential artists in jazz and hip hop. The Chicago Symphony Orchestra and the Lyric Opera of Chicago are world-class institutions. The city's improvisational comedy tradition launched The Second City theater. Culinary staples include Chicago-style hot dogs, Italian beef, and deep-dish pizza. Major cultural institutions include the Art Institute of Chicago, the Field Museum of Natural History, and the Museum of Science and Industry.

Government and politics