Delaplane is an unincorporated community in northern Fauquier County, Virginia, located approximately 50 miles (80 km) due west of Washington, D.C. Delaplane is situated along U.S. Route 17 and Interstate 66; bordering Upperville, Virginia to the north, Hume, Virginia to the south, Paris, Virginia to the west, and Rectortown, Virginia to the east. Delaplane, Virginia has a ZIP Code of 20144. Since approximately 1995, the Mosby Heritage Area Association has worked to preserved Delaplane and surrounding areas, which Virginia designated the Moseby Heritage Area. In 2004, the federal government recognized the Crooked Run Valley Rural Historic District, which encompasses the Delaplane Historic District as well as the historic district of Paris, Virginia and many other properties.