The Plains is a town in Fauquier County, Virginia, United States. The population was 217 at the 2010 census, down from 266 at the 2000 census. It is centered on the intersection of Virginia Route 55 (John Marshall Highway) and Virginia Route 245 (Old Tavern Road). The town of The Plains, Virginia is situated off of Interstate 66. The mayor of The Plains is Blake Gallagher.