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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.
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.
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 Quad Cities region, located along the Mississippi River in northern Illinois, had a population of 381,342 in 2011. The midsection of Illinois is the second major division, called Central Illinois. Historically prairie, it is now mainly agricultural and known as the Heart of Illinois. It is characterized by small towns and medium–small cities.
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 ...
On July 21, 2023, the OMB delineated 14 combined statistical areas, 12 metropolitan statistical areas, and 21 micropolitan statistical areas in Illinois. [1] As of 2023, the largest of these is the Chicago-Naperville, IL-IN-WI CSA , comprising the area around Illinois' largest city, Chicago .
The location of the state of Illinois in the United States of America. The following outline is provided as an overview of and topical guide to the U.S. state of Illinois: Illinois – fifth most populous of the 50 states of the United States of America.
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.