S. W. R. D. Bandaranaike, Sri Lankan lawyer and politician, 4th Prime Minister of Sri Lanka (died 1959)

Solomon West Ridgeway Dias Bandaranaike, also known as "The Silver Bell of Asia", was a Sri Lankan statesman who served as the fourth Prime Minister of the Dominion of Ceylon, serving from 1956 until his assassination in 1959. The founder of the left-wing and Sinhalese nationalist Sri Lanka Freedom Party, he was elected the fourth Prime Minister of Ceylon after creating a powerful coalition called the Mahajana Eksath Peramuna and contesting on the lines of Sinhalese nationalism and democratic socialism. He achieved a landslide victory over the ruling United National Party in the general elections in 1956.

The prime minister of Sri Lanka, officially the prime minister of the Democratic Socialist Republic of Sri Lanka is the most senior member of parliament in the cabinet of ministers. It is the second-most powerful position in Sri Lanka's executive branch behind the president, who is the constitutional chief executive. The Cabinet is collectively held accountable to parliament for their policies and actions. The powers and functions of the prime minister has changed several times since the creation of the office in 1947.