Asgiri Maha Viharaya is a Buddhist monastery located in Kandy, Sri Lanka. It is the headquarters of the Asgiriya chapter of Siyam Nikaya, one of the two Buddhist monasteries that holds the custodianship of sacred tooth relic of Buddha kept in Sri Dalada Maligawa, Kandy. The chief incumbent of the Asgiri Maha Viharaya is the Mahanayaka thero of Asgiri chapter of Siyam nikaya, a leading Buddhist monastic fraternity in Sri Lanka. The present chief incumbent of Asgiri Maha Viharaya is Warakagoda Sri Gnanarathana Thero. Asgiri Maha Vihara traces its origin from the Wanavasi sect of the Dimbulagala forest monastery of Polonnaruva. Currently, 565 Buddhist temples in Sri Lanka function under Asgiri Viharaya of Kandy.