| Colombo Plan, The - Questions & Answers | Colombo Plan Bureau | N/A | N/A | General |
| Colombo Plan, The - Some Political Aspects | L.P. | Singh | 1963 | General |
| Colombo Rides The Tiger | Ministry of State | N/A | 1985 | General |
| Colombo to Badulla by Train | D. P. L. Walter | Silva | 2017 | General |
| Colonel Olcott His Service To Buddhism | B.P. | Kirthisinghe | 1981 | Religion |
| Colonial Economy on Track, The - Roads & Railways in Sri Lanka (1800-1905) | Indrani | Munasinghe | 2002 | General |
| Colonial Kollupitiya & Its Environs | H. M. Mervyn | Herath | 2004 | General |
| Colonial Mixed Blood, A Story of the Burghers of Sri Lanka | Allan Russell | Juriansz | 2013 | General |
| Colonialism in Sri Lanka - Political Economy of the Kandyan Hills | Asoka | Bandarage | 1983 | General |
| Colonization in the Dry Zone of Ceylon | B.H. | Farmer | N/A | General |
| Colosseum, The | Dipti | Saravanamuttu | 2004 | Literature |
| Colour - Sri Lanka | Dominic | Sansoni | 2005 | General |
| Colour Guide to the Snakes of Sri Lanka | Anslem | De Silva | 1990 | General |
| Coloured Atlas of Some Vertebrates From Ceylon, A - Vol 1, Fishes | P.E.P. | Deraniyagala | 1952 | General |
| Coloured Atlas of Some Vertebrates From Ceylon, A - Vol 2, Tetrapod Reptilia | P.E.P. | Deraniyagala | 1953 | General |
| Colours of the Sun | Rozaine | Cooray | 2010 | Literature |
| Colpetty People | Ashok | Ferrey | 2005 | Literature |
| Coming Back - The Science of Reincarnation | A.C. | Bhaktivedanta | 1983 | Religion |
| Coming Through Slaughter | Michael | Ondaatje | 1976 | Literature |
| Commentary on Sinhala Kingship (Vijaya to Kalinga Magha) | P.B. | Rambukwelle | 1993 | History |
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