The city of Darien is located in the county of DuPage. It covers a total area of 16.3 sq. km. Industries related to advertising, alternative medicine, household appliances, automotive, beverages, construction, apparel, information technology, pharmaceuticals, freight forwarding, industrial and commercial machinery, insurance, oil and lubrication, sheet metal, motor freight and wireless communication, enhance the local economy in a positive way. Commercial spaces are utilized by youth centers, road side services, service stations and recreation centers.