Srivilliputhur Megamalai Tiger Reserve is a tiger reserve, located in Tamil Nadu. It is the 51st tiger reserve of India and the 5th tiger reserve of tamil nadu, covering a total area of 1016.57 kilometre square. The reserve was formed on 11 April 2021 by combining two wild life sanctuaries namely grizzled squirrel wild life sanctuary and Megamalai wildlife sanctuary.