Volusia is an unincorporated community in Volusia County, Florida, United States, on the eastern shore of the St. Johns River. It is about three miles south of Lake George and across the river from the town of Astor in Lake County. Established by Spanish missionaries, Volusia is one of the oldest European settlements in Florida. The main route through the town is State Road 40, which crosses the St. Johns on the Astor Bridge.