Illiana is an unincorporated community in Newell Township, Vermilion County, Illinois, United States. In this area, State Line Road runs along the border between Illinois and Indiana; Illiana is just across the road from the town of State Line City in Warren County in Indiana. Its name is based on the portmanteau method of naming, combining the words 'Illinois' and 'Indiana'.
- ^ "Illiana". Geographic Names Information System. United States Geological Survey. Retrieved 2010-10-20.