An Illinois Tollway oasis is a type of commercialized rest area sited over interstate highways that are part of the toll road system in northern Illinois, United States. The seven oases offer food and gasoline vendors and are found in the Chicago Metropolitan Area, DeKalb, and Belvidere. Although the oases date back to the original tollway construction in 1958, they were redeveloped in 2003–05 by Wilton Partners, a private developer. The redevelopment of the oases has been the focal point of alleged political corruption.