Jayantha Dhanapala (Sinhala: ජයන්ත ධනපාල; born 30 December 1938) is a Sri Lankan diplomat who serves as member of the Board of Sponsors of The Bulletin of the Atomic Scientists and was a governing board member of the Stockholm International Peace Research Institute. Dhanapala is also a distinguished member of Constitutional Council of Sri Lanka and he is the Senior Special Advisor on Foreign Relations to President Maithripala Sirisena, and was Sri Lanka's official candidate for the post of Secretary-General of the United Nations, before withdrawing from the race on 29 September 2006. From 2007 he has been the President of the Pugwash Conferences on Science and World Affairs.