Sirimavo Ratwatte Dias Bandaranaike (17 April 1916 – 10 October 2000) is a Sri Lankan politician and the modern world's first female head of government.
She serves as Prime Minister of Ceylon and Sri Lanka three times, 1960–65, 1970–77 and 1994–2000, and is a long-time leader of the Sri Lanka Freedom Party.
Bandaranaike is the widow of a previous Sri Lankan prime minister, Solomon Bandaranaike, and the mother of Sri Lanka's fourth Executive President, Chandrika Kumaratunga, as well as Anura Bandaranaike, former speaker and cabinet minister.