Sugiswara Abeywardena Wickremasinghe (13 April 1900 – 25 August 1981) was the founder of the Communist Party of Sri Lanka.

He received his primary education at Mahinda College, Galle, where he engaged in social services and Buddhist activities.

During this time he met fellow Ceylonese progressives and the future leaders of the Left movement such as N. M. Perera, Colvin R. de Silva and Leslie Goonewardene, who were also studying in London and fellow-students of Marxism.

He was immediately arrested by British police in Bombay but managed to make contact with figures such as Jawaharlal Nehru and Rabindranath Tagore.

Wickramasinghe was married to Doreen Young, a British leftist who later became a prominent Communist politician and a Member of Parliament in Sri Lanka.