Samaranayake is a surname. Notable people with the surname include: Anusha Samaranayake (born 1962), Sri Lankan former cricketer Gamini Samaranayake, Sri Lankan diplomat Lakshman Samaranayake, Sri Lankan academic Mark Samaranayake (1914–2000), Sri Lankan actor R. G. Samaranayake (1923–1992), Ceylonese politician V. K. Samaranayake (1939–2007), Sri Lankan computer scientist