Non-Government or Civil Society Organisations
- CARAM Asia (1997 - )
- CARE Australia (1987 - )
- CARE Canada (1946 - )
- CARE International (1945 - )
- CARE Japan
- Center for Strategic and International Studies (1962 - )
- Centre for Harm Reduction, MacFarlane Burnet Institute for Medical Research and Public Health
- Centre for International Health (1986 - ), MacFarlane Burnet Institute for Medical Research and Public Health
- CFR
- see Council on Foreign Relations (1921 - ) - China AIDS Survey
- Christian Aid (1945 - )
- Coalition of Asia Pacific Regional Network on HIV/AIDS
- see Seven Sisters (2001 - ) - Constella Futures (1971 - )
- Coordination of Action Research on AIDS & Mobility
- see CARAM Asia (1997 - ) - Council on Foreign Relations (1921 - )
- CSIS
- see Center for Strategic and International Studies (1962 - )