The Leader of the Opposition in the Tamil Nadu Legislative Assembly is an elected Member of Legislative Assembly who leads the official opposition in the Tamil Nadu Legislative Assembly. The Leader of the Opposition in the Tamil Nadu Legislative Assembly is the chairperson of the largest political party in the legislative assembly that is not in government (provided that said political party has at least 10% of the seats in the legislative assembly). The current incumbent has been Edappadi K. Palaniswami of the All India Anna Dravida Munnetra Kazhagam since 11 May 2021.