Sir Ratnakirti Senerat Serasinghe Gunewardene, KBE (3 November 1899 – 10 August 1981) was a Sri Lankan statesmen and diplomat.
He was the Minister without Portfolio in the first post independence government and member of parliament, prior to which he had served as acting Minister of Local Government in the State Council of Ceylon.
He later served as Ceylon's High Commissioner to United Kingdom, Ambassador to Italy and when he was serving as Ceylon's Ambassador to the United States he was appointed concurrently as the first Permanent Representative to United Nations.