Wathumulla Grama Niladhari Division is a Grama Niladhari Division of the Ratmalana Divisional Secretariat of Colombo District of Western Province, Sri Lanka . It has Grama Niladhari Division Code 544A. Samudrasanna Vihara are located within, nearby or associated with Wathumulla. Wathumulla is a surrounded by the , , , and Mount Lavinia Grama Niladhari Divisions.