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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 ...
The Quad Cities Metropolitan Area is on both sides of the Mississippi River separating Illinois from Iowa. The Illinois side includes Henry County, Mercer County, and Rock Island County. [4] In extreme northwestern Illinois the Driftless Zone, a region of unglaciated and therefore higher and more rugged topography, occupies a small part of the ...
Central Illinois is a region of the U.S. state of Illinois that consists of the entire central third of the state, divided from north to south. Also known as the Heart of Illinois , it is characterized by small towns and mid-sized cities.
An enlargeable map of the state of Illinois. Names Common name: Illinois. Pronunciation: / ˌ ɪ l ɪ ˈ n ɔɪ / ⓘ IL-i-NOY; Official name: State of Illinois; Abbreviations and name codes Postal symbol: IL; ISO 3166-2 code: US-IL; Internet second-level domain: .il.us; Nicknames Land of Lincoln [1] (currently used on license plates) Prairie ...
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.
Northwestern Illinois is a geographic region of the state of Illinois within the USA. Northwestern Illinois is generally considered to consist of the following area: Jo Daviess County , Carroll County , Whiteside County , Stephenson County , Winnebago County , Ogle County , and Lee County .
Galena is the largest city in and the county seat of Jo Daviess County, Illinois, United States. [7] It had a population of 3,308 at the 2020 census. [6] A 581-acre (235 ha) section of the city is listed on the National Register of Historic Places as the Galena Historic District.
South Central Illinois is a region in the southern part of Illinois; its approximate boundaries are US 50 in the south, and Illinois Highway 16 in the north. With fertile soil throughout the region, agriculture is a chief industry here. Some of the largest communities in south-central Illinois are Alton, Collinsville, Edwardsville, and Effingham.