Registering to vote in the Roanoke Area: To vote in Virginia, a person must be 18 years old and a resident of the state. A person must register in Virginia thirty (30) days prior to a general election. Registrar offices are listed below: Roanoke City; 215 Church Ave., Room 109, Roanoke (540) 981-2281 Roanoke County & Vinton; 5204 Bernard Drive, Roanoke;  (540) 772-7500 Salem City;19 East Clay St., Salem (540) 375-3034 Botetourt County; 1 W. Main St., Courthouse, Fincastle; (540) 992-8235