DuPage County is located in the northeastern part of the state of Illinois, just west of Chicago. It is one of the most populous counties in the state, known for its suburban communities, parks, and recreational areas. The county seat is Wheaton, which is home to several historical sites and cultural institutions. The county is also recognized for its strong economy, with a mix of residential, commercial, and industrial areas. Major highways, such as Interstate 88 and Interstate 355, provide easy access to surrounding regions. DuPage County offers a variety of services and amenities, making it a desirable place to live and work.