Illiana

Illiana is the general area around the border between the U.S. states of Illinois and Indiana, containing the eastern edge of Illinois and the western edge of Indiana. The word is a portmanteau of the two states' names. The name also applies specifically to Illiana, Illinois, which is the name given to that part of the Indiana town of State Line that protrudes west across the border into Illinois. Illiana is also the namesake of the Illiana Motor Speedway.