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  2. Geography of Illinois - Wikipedia

    en.wikipedia.org/wiki/Geography_of_Illinois

    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 state. Charles Mound, located in this region, is the state's highest elevation above sea level.

  3. Illinois statistical areas - Wikipedia

    en.wikipedia.org/wiki/Illinois_statistical_areas

    The U.S. State of Illinois currently has 47 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated 14 combined statistical areas, 12 metropolitan statistical areas, and 21 micropolitan statistical areas in Illinois. [1]

  4. Category:Regions of Illinois - Wikipedia

    en.wikipedia.org/wiki/Category:Regions_of_Illinois

    Pages in category "Regions of Illinois" The following 23 pages are in this category, out of 23 total. This list may not reflect recent changes. A. American Bottom; C.

  5. Outline of Illinois - Wikipedia

    en.wikipedia.org/wiki/Outline_of_Illinois

    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 ...

  6. List of regions of the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_regions_of_the...

    U.S. Census Bureau regions and divisions. Since 1950, the United States Census Bureau defines four statistical regions, with nine divisions. [1] [2] The Census Bureau region definition is "widely used... for data collection and analysis", [3] and is the most commonly used classification system.

  7. Central Illinois - Wikipedia

    en.wikipedia.org/wiki/Central_Illinois

    Central Illinois within Illinois. Historically prairie, Central Illinois is generally flat and includes Douglas County, the state's flattest. [2] [3] The region also hosts a variety of man-made lakes, including Lake Shelbyville, Lake Springfield, Clinton Lake and Lake Decatur. [4]

  8. List of ecoregions in Illinois - Wikipedia

    en.wikipedia.org/wiki/List_of_ecoregions_in_Illinois

    Illinois' ecology is in a land area of 56,400 square miles (146,000 km 2); the state is 385 miles (620 km) long and 218 miles (351 km) wide and is located between latitude: 36.9540° to 42.4951° N, and longitude: 87.3840° to 91.4244° W, [1] with primarily a humid continental climate.

  9. Illinois - Wikipedia

    en.wikipedia.org/wiki/Illinois

    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.