Long Island is an unincorporated community in Campbell County, Virginia, United States. Long Island is located along the Roanoke River east-southeast of Altavista.The main road through the community is Virginia Secondary Route 761, and the community is almost entirely agricultural. A former Norfolk and Western Railway line runs through the community on the northeast bank of the Staunton River. A boat ramp exists south of VSR 761.Green Hill was listed on the National Register of Historic Places in 1969.