Leslie Simon Bernard Perera, CCS, commonly known as L. S. B. Perera, was a Sri Lankan civil servant. A career officer of the Ceylon Civil Service, he was the Permanent Secretary of the Ministry of Health and the Ministry of Cultural Affairs and Social Services as Director Civil Aviation, he played a major role in the formation of Air Ceylon. Later he served as High Commissioners of Sri Lanka to Canada. In 1967, he was appointed High Commissioner of Sri Lanka to Canada by prime minister Dudley Senanayake and served till 1970.