Tennessee Voting Registers
Voting registers list the persons who were eligible to vote, or those who voted. Sometimes the date and court of naturalization are mentioned in voting records. Often these records are available on a yearly basis. You can use them to show where your ancestor lived in a certain year.
Eligible voters in Tennessee paid a tax for the privilege of voting. See the Tennessee Taxation wiki article.
Original poll (voter) lists may be in the custody of county clerks. Some larger counties have separate Election Commissions. The Family History Library has few such lists for Tennessee. Those available are listed in the Locality Search of the Family History Library Catalog under:
TENNESSEE - TAXATION
TENNESSEE - PUBLIC RECORDS
TENNESSEE, [COUNTY] - PUBLIC RECORDS
TENNESSEE, [COUNTY] - TAXATION
TENNESSEE, [COUNTY] - VOTING REGISTERS