| Comments on Ceylon Birds | S.Dillon | Ripley | N/A | General |
| Comments on Independence | Ivor W., Sir | Jennings | 1948 | General |
| Comments On The Endemic Birds of Sri Lanka | Robert L. | Fleming | 1977 | General |
| Commercial Ceylon | S.E.N. | Nicholas | 1933 | General |
| Commercial Profitability of Tourism | M.A. | Gamage | 1981 | General |
| Commitment To Service, A | Jehan | Perera | 1990 | General |
| Common Butterflies of Sri Lanka | Himesh | Jayasinghe | 2015 | General |
| Common Forest Trees of Sri Lanka | Sudheera M. W. | Ranwala | 2016 | General |
| Common Garden Birds of Sri Lanka, describing & depicting 30 species | Pathmanath | Samaraweera | 2016 | General |
| Common Reef Fishes of Sri Lanka | Charles, Dr | Anderson | 1996 | General |
| Commoner Diseases of Tea, The | C.H. | Gadd | 1949 | General |
| Commonwealth in Asia, The | Ivor, Sir | Jennings | 1951 | General |
| Commonwealth Pen, The | A. L | McLeod | 1961 | General |
| Communal Politics Under The Donoughmore Constitution 1931-1947 | Jane | Russell | 1982 | Politics |
| Communal Riots in Post Independence India | Asghar Ali | Engineer | 1984 | General |
| Communal Violence in Sri Lanka, July 1983, The | Patricia | Hyndman | N/A | General |
| Communication Policies in Sri Lanka | M.A. | de Silva | 1977 | General |
| Community Education In Promoting Peace & Justice | A.T. | Ariyaratne | 1991 | General |
| Community No 3, 1963 - The Public Services & The People | C.R. | Hensman | 1963 | General |
| Community Profiles, Sri Lanka Born, Census 1991 | N/A | Bureau of Immigration & Multicultural Population Research | 1995 | General |
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