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  2. Northern Illinois - Wikipedia

    en.wikipedia.org/wiki/Northern_Illinois

    Northern Illinois University (NIU), in DeKalb, is located at the heart of Northern Illinois and is the state's second largest institute of higher education.According to the Regional History Center at NIU, their area of service to the northern portion of Illinois includes the 18 northernmost counties, excluding Cook, Grundy, Kankakee, Mercer and Rock Island Counties, [3] which are covered by ...

  3. Geography of Illinois - Wikipedia

    en.wikipedia.org/wiki/Geography_of_Illinois

    Nearly the entire western boundary of Illinois is the Mississippi River, except for a few areas where the river has changed course. Illinois' southeastern and southern boundary is along the Wabash River and the Ohio River, whereas its northern boundary and much of its eastern boundary are straight survey (longitudinal and latitudinal) lines ...

  4. 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.

  5. Category:Regions of Illinois - Wikipedia

    en.wikipedia.org/wiki/Category:Regions_of_Illinois

    Northern Illinois geography stubs (4 C, 110 P) Southern Illinois geography stubs (1 C, 528 P) Pages in category "Regions of Illinois" The following 23 pages are in ...

  6. Geography of Chicago - Wikipedia

    en.wikipedia.org/wiki/Geography_of_Chicago

    Geography of Chicago and surrounding counties. Satellite image of Chicago, October, 2018 The city of Chicago is located in northern Illinois , United States, at the south western tip of Lake Michigan .

  7. List of National Natural Landmarks in Illinois - Wikipedia

    en.wikipedia.org/wiki/List_of_National_Natural...

    Natural Landmarks in Illinois range from 53 to 6,500 acres (21.4 to 2,630.5 ha; 0.1 to 10.2 sq mi) in size. Owners include private individuals or organizations, and several county, state and federal agencies. [2] The National Natural Landmarks Program is administered by the National Park Service, a branch of the Department of the Interior. The ...

  8. Climate of Illinois - Wikipedia

    en.wikipedia.org/wiki/Climate_of_Illinois

    Average yearly precipitation for Illinois varies from 48 inches or 1,220 mm at the southern tip to 35 inches or 890 mm in the northern portion of the state. Normal annual snowfall exceeds 38 inches or 0.97 m in Chicago, while the southern portion of the state normally receives less than 14 inches or 0.36 m. [1]

  9. List of counties in Illinois - Wikipedia

    en.wikipedia.org/wiki/List_of_counties_in_Illinois

    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.