Champaign is a city in Champaign County, Illinois, United States. The population was 88,302 at the 2020 census. It is the tenth-most populous municipality in Illinois and the fourth most populous city in Illinois outside the Chicago metropolitan area. It is included in the Champaign–Urbana metropolitan area. Champaign shares the main campus of the University of Illinois with its twin city of Urbana.
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