Santiago Wilson Osmund De Silva OBE (25 December 1909 - c. 1980) was Ceylonese police officer.
[5][6] In 1955 de Silva succeeded his father-in-law, Sir Richard Aluwihare to be appointed as Inspector General of Police (IGP).
In 1959 the Prime Minister of Ceylon, S. W. R. D. Bandaranaike requested that the police intervene against trade union action occurring at Colombo Harbour.
[10][11] On 24 April 1959, de Silva was compulsorily retired from the police force and M. Walter F. Abeykoon, a civil servant, was appointed in his place.
[12] In 1941, he married Ena Aluvihare, the nineteen year old daughter of the civil servant Richard Aluwihare, who would become the first Ceylonese Inspector General of Police in 1947.