Austinville is an unincorporated community and census-designated place (CDP) on the New River in southern Wythe County, Virginia, United States.The town is the birthplace of Stephen F. Austin, for whose family it is named.The ZIP code (mail delivery region) for Austinville extends south into neighboring Carroll County.Austinville is built on the location of Lead Mines, the seat of the former Fincastle County.This Wythe County, Virginia state location article is a stub.