| Dictionary of the Sinhalese Language, A - Vol 1, Part 6 | D.B., Sir | Jayatilaka | 1941 | General |
| Dictionary, English & Sanskrit, A | Monier | Williams | 1971 | General |
| Diesel - Electric Locomotives - M1 Loco | N/A | N/A | 1958 | General |
| Diesel Rail Traction in Ceylon | H.W.F. | Freer | 1939 | General |
| Dietetics | Ananda | Namalasuria | 1948 | General |
| Different Kind of Madness, A | Pauline | Schokman | 2019 | Literature |
| Digest of Ceylon Cases, A - 1965 - 1968 | V.S. | Sivagurunathan | 1968 | General |
| Digest of the Civil Law of Ceylon, A - Vol 1 | P. | Arunachalam | 1910 | General |
| Digging Intothe Past - Essays of Antiquity | Raja | de Silva | 2005 | General |
| Digging Up the Family - A Guide to Genealogy & How to Find Where You have Come From in any Country | Kyle J. | Joustra | 2012 | General |
| Dilemma of an Island | Merril | Gunaratne | 2001 | General |
| Dilemma of Sri Lanka,The | T.D.S.A. | Dissanayaka | N/A | General |
| Dilemma of Theories, The - A Feminist Perspective | Selvy | Thiruchandren | 1991 | General |
| Dimensions of Sri Lankan Returned Migration | R.B.M. | Korale | 1985 | General |
| Dipavamsa & Mahavamsa, The & Their Historical Development in Ceylon | Wilhelm | Geiger | 1908 | General |
| Dipavamsa, The - An Ancient Buddhist Historical Record | Hermann | Oldenberg | 1992 | Religion |
| Diplomat for all Seasons, A: Essays in Honour of Deshmanaya Dr Vernon L.B.Mendis | Lorna S. | Dewaraja | 2004 | General |
| Directory of Dates & Events, Sri Lanka (Ceylon) 543 BC - 1984 AD | K. D. G. | Wimalaratne | 1988 | General |
| Directory of Exporters 1989-1990 | Ceylon Chamber of Commerce | N/A | 1990 | General |
| Directory of Office Holders of the Kandyan Kingdom, Sri Lanka | Kapila Pathirana | Vimaladharama | 2003 | History |
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