Aurora, IL
Aurora is a city in northeastern Illinois, United States. Located primarily in Kane and DuPage counties along the Fox River, it is the second-most populous city in Illinois, after Chicago, and the 144th-most populous city in the U.S. The population was 180,542 at the 2020 census. Aurora is the largest city in Illinois that is not the county seat of any county that it resides in. Source: Wikipedia