Tenn. Code Ann. § 17-1-206

The several judges and chancellors of this state, including retired chancellors and retired judges of courts of record of this state and persons who were members of quarterly county courts or county commissions on August 1, 1984, are authorized to solemnize the rites of matrimony. For the purposes of this section, the several judges of the United States courts who are citizens of Tennessee are deemed to be judges of this state.