Vandalia Township is one of twenty townships in Fayette County, Illinois, USA. As of the 2010 census, its population was 6,629 and it contained 3,115 housing units.GeographyAccording to the 2010 census, the township has a total area of, of which is land and is water.Cities, towns, villages Vandalia (southeast three-quarters)Unincorporated towns Bluff CityExtinct towns Pinhook PopeCemeteriesThe township contains these eight cemeteries: Fairlawn, Haley Chapel, Mother of Dolors, Old State Burial Ground, Pinhook, Ritter, South Hill and Vandalia City.Major highways 25px Interstate 70 25px U.S. Route 40 25px U.S. Route 51 25px Illinois Route 140 25px Illinois Route 185Rivers Kaskaskia River