Moratuwa is a large suburb of Colombo, on the southwestern coast of Sri Lanka, near Dehiwala-Mount Lavinia. It is situated on the Galle–Colombo main highway, 18 km south of Colombo city centre. Moratuwa is surrounded on three sides by water, except in the north of the city, by the Indian Ocean on the west, the Bolgoda lake on the east and the Moratu river on the south. According to the 2012 census, the suburb had a population of 168,280.
Moratuwa is also the birthplace of Veera Puran Appu, a resistance fighter against British rule in Matale, the philanthropist Sir Charles Henry de Soysa and the musician Pandit W. D. Amaradeva.