Ekanayake Mudiyaselage Idame Gedara Indunil Madushan Herath (born 27 March 1993) is a Sri Lankan middle-distance runner who specialises in the 800 metres. He won a silver medal at the 2017 Asian Indoor and Martial Arts Games. In 2018, Herath broke the national record in the men's 800 m (with a time of 1:47.13) at the Kenyan President's Cup athletics.