Third National Bank may refer to:

in the United States (by state) Third National Bank (Atlanta, Georgia), now The Metropolitan (Atlanta condominium building) Third National Bank (Glasgow, Kentucky), listed on the NRHP in Kentucky Third National Bank (Ohio), a predecessor of Fifth Third Bank Third National Bank (Syracuse, New York), listed on the NRHP in New York Third National Bank (Sandusky, Ohio), listed on the NRHP in Ohio Third National Bank in Nashville, incorporated within SunTrust Bank since December 1986