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The western section (west of the Illinois River) was originally part of the Military Tract of 1812 and forms the distinctive western bulge of the state. Central Illinois is characterized by small towns and mid-sized cities. Agriculture, particularly corn and soybeans, figures prominently. Major cities include Peoria, and Springfield (the state ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 25 January 2025. "Cities in Illinois" redirects here. For unincorporated communities, see List of unincorporated communities in Illinois. For CDPs, see List of census-designated places in Illinois. Map of the United States with Illinois highlighted Illinois is a state located in the Midwestern United ...
Illinois's FIPS state code is 17 and its postal abbreviation is IL. What is now Illinois was claimed as part of Illinois County, Virginia, between 1778 and 1782. Modern-day county formation dates to 1790 when the area was part of the Northwest Territory; two counties—St. Clair and Knox—were created at that time.
Southern Illinois is a region of the U.S. state of Illinois comprising the southern third of the state, principally south of Interstate 70.Part of downstate Illinois, it is bordered by the two most voluminous rivers in the United States: the Mississippi below its connection with the Missouri River to the west and the Ohio River to the east and south, with the tributary Wabash River, extending ...
The location of the state of Illinois in the United States of America An enlargeable map of the 102 counties of the state of Illinois. Prehistory of Illinois. Indigenous peoples. Mississippian culture. Cahokia; French colony of Louisiane, 1699–1763; Upper Louisiana was called Illinois Country. Treaty of Paris of 1763
Chicagoland by county and state [13] A map of Chicagoland in relation to the states of Wisconsin, Illinois, and Indiana Chicagoland is an informal name for the Chicago metropolitan area. The term Chicagoland has no official definition, and the region is often considered to include areas beyond the corresponding MSA, as well as portions of the ...
Illinois 2020 Population Density Map. Illinois is the most populous state in the Midwest region. Chicago, the third-most populous city in the United States, is the center of the Chicago metropolitan area or Chicagoland, as this area is nicknamed.
Springfield is the capital city of the U.S. state of Illinois.Its population was 114,394 at the 2020 United States census, which makes it the state's seventh-most populous city, [10] the second-most populous outside of the Chicago metropolitan area (after Rockford), and the most populous in Central Illinois.