Ranasinghe Hettiarachchige Tudor Edward Ranasinghe Gunasekara (23 January 1935 – 29 August 2021), known as Tudor Gunasekara (Sinhala: ටියුඩර් ගුණසේකර), was a Sri Lankan politician and diplomat. He was a Member of Parliament, District Minister for Gampaha in President JR Jayawardene's government. Later, he served as the first Sri Lanka ambassador to Poland, Bulgaria, Romania, and Hungary.