| Double Blue, The - Vol XXXIX, 1975-1985 (Wesley College, Colombo) | N/A | Magazine Committee | 1985 | General |
| Doughty Dons of Dowa, The | Kirthie | Abeyesekera | 2001 | Literature |
| Douglas F. Goonewardene Biography | N/A | N/A | 2020 | General |
| Douglas Papers, The - When Ceylon was to be Made a Crown Colony | S.G., Rev. Fr | Perera | 1933 | General |
| Down to Earth: Real Principles for Fertiliser Practice | Michael | Blake | 1970 | General |
| Dr Mary Ratnam | Kumari | Jayawardena | 1993 | General |
| Dr. Alice de Boer and Some Pioneer Burgher Women Doctors | Deloraine | Brohier | 1994 | General |
| Draft Bill of Pradeshiya Sabha - The All Party Conference | Govt of Sri Lanka | N/A | 1984 | Politics |
| Draft Proposals & Provincial Councils Bill | Govt of Sri Lanka | N/A | 1984 | Politics |
| Draft Proposals (30.8.85 to 19.12.86) Government | Govt of Sri Lanka | N/A | 1986 | General |
| Dragonflies of Sri Lanka | Gehan | de Silva Wijeyeratne | N/A | General |
| Dragonflies of Sri Lanka, The | Terrence | de Fonseka | 2000 | General |
| Dravida, A History of the Tamils from Prehistoric Times to 1800 | E. L. | Tambimuttu | 1945 | General |
| Dravidian Origin & Philosophy of the Human Speech | T.C., Rev. Fr | Closset | 1941 | General |
| Dream Time River | James | Goonewardene | 1984 | Literature |
| Dreams & Visions | Cleone | Jordan-Melder | 1991 | Literature |
| Driving, Challenges and the Essential Skills | T. | Perinpanayagam | 2004 | General |
| Drought in a New Settlement Scheme in Sri Lanka | Douglas J. | Merrey | 1989 | General |
| Drum, The | L.P.G. | N/A | N/A | General |
| Dudley Senanayake of Sri Lanka | T.D.S.A. | Dissanayaka | 1975 | Politics |
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