Founded in 1957, as a nonprofit organization under Sri Lankan law, the school was originally named The Colombo School for Overseas Children. It was located at Queen’s Street in Colombo Fort when the school first opened on Monday, 23 September 1957. The founders were from diplomatic missions British High Commission, Burmese High Commission and Dutch Embassy and the business community which reflects the school population today. In September 1961, the school leased the premises known as “Rippleworth” at Turret Road Dharmapala Mawatha in Colombo 3. The younger children remained at the Fort while the older children moved to Rippleworth. In August 1963 the school in Fort had 100 children, while the school at Rippleworth, known as the Upper School, had about 72 children. In 1967 the school gained accreditation by the International Schools Association in Geneva, Switzerland.

Address: The Overseas School of Colombo Box 9, Pelawatte, Battaramulla, Sri Lanka
Telephone: 0094 11 2784920-4
Fax: 0094 11 2784999
Website: http://www.osc.lk/