Illinois

Illinois is a Midwestern U.S. state bordered by the Mississippi River on the west and Lake Michigan on the northeast. Its largest city is Chicago.

Chicago: Chicago is Illinois’s largest city and a major center of transportation, commerce, and culture. Its population and economic weight make it the state’s most prominent city.
Illinois Territory: Illinois Territory was a United States territory that existed from 1809 until Illinois became a state in 1818. It was the immediate territorial predecessor of the state.
Port of Chicago: The Port of Chicago is a system of facilities on Lake Michigan and the Chicago Sanitary and Ship Canal. It links Illinois’s lakefront to inland waterways and commercial shipping.
Cahokia: Cahokia was a large Indigenous city near present-day St. Louis that flourished between about 1050 and 1350. Its archaeological remains in southwestern Illinois reveal a major precolonial urban center.
Indiana: Indiana is a Midwestern U.S. state east of Illinois, with Indianapolis as its capital and largest city. The neighboring state shares regional ties but has a distinct urban center and political history.
Springfield, Illinois: Springfield is the capital of Illinois, located in the central part of the state. State government is centered here, far from Chicago’s metropolitan region.
Illinois Statehood: Illinois entered the United States as the twenty-first state on December 3, 1818. Statehood established Illinois’s place in the Union and enabled self-government.
Illinois Waterway: The Illinois Waterway is a navigable river and canal route connecting Lake Michigan to the Mississippi River. It makes the state a link between Great Lakes and Mississippi traffic.
Lincoln Home National Historic Site: Lincoln Home National Historic Site preserves the Springfield house where Abraham Lincoln lived before becoming president. The site connects Illinois’s capital to Lincoln’s political life.
Missouri: Missouri is a Midwestern U.S. state west of Illinois, across the Mississippi River. The river separates the states while connecting their regional economies and histories.

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