- Danish NGO Network on AIDS and Development (AIDSNET) (2000 - )
- Declaration of Commitment
- see United Nations General Assembly Special Session on HIV/AIDS - Democratic People's Republic of Korea, Korea, DPR
- Democratic Republic of Timor-Leste, East Timor
- Democratic Socialist Republic of Sri Lanka, Sri Lanka
- Department for International Development (1997 - ), United Kingdom Government
- Determinants of the epidemic
- Development
- see Agriculture/rural development - Development
- see Economics and development - DFID
- see Department for International Development (1997 - ), United Kingdom Government - Diagnostic tests
- see Testing, notification and reporting - Discrimination
- see Stigma and discrimination - Displaced people
- see Mobile populations - Division of AIDS and STD, Centre for Disease Control (1999 - ), Taiwan, R.O.C.
- DKT International (1989 - )
- Doctors Without Borders
- see Medecins Sans Frontieres (1971 - ) - Drug use
- see Injecting drug use