Leslie Simon Goonewardene (31 October 1909 – 11 April 1983) was a prominent Sri Lankan independence activist, politician, Member of Parliament and Cabinet Minister.
He was one of the founders of the Marxist Lanka Sama Samaja Party – the first political party in Sri Lanka, and later served as the party Leader from 1935-1977.
He later served as Minister of Transport and Minister of Communications in the Second Sirimavo Bandaranaike cabinet under the United Front Coalition.
He was designated as a National Hero of Sri Lanka for his leadership in the Independence movement, and his efforts are celebrated each year on the Sri Lankan Independence Day.