| Coorporación CLAYUCA (CLAYUCA) | National agricultural research and extension services | Latin America | Climate Services and Safety Nets |
| Cornell University | Academic Institution | | Climate-Smart Technologies and Practices, Climate Services and Safety Nets, Low Emissions Development |
| Corporación Colombiana de Investigación Agropecuaria (CORPOICA) | National agricultural research and extension services | Latin America | Climate-Smart Technologies and Practices, Low Emissions Development |
| Council on Renewable Natural Resources Bureau (CoRRb) | National agricultural research and extension services | South Asia | Climate-Smart Technologies and Practices |
| CRP 1.1 Dryland Systems | Challenge Research Program | West Africa | Climate Services and Safety Nets |
| CRP 2 Policies, institutions and markets | Challenge Research Program | West Africa | |
| CRP 3.1 Wheat | Challenge Research Program | West Africa | Climate-Smart Technologies and Practices |
| CRP 3.2 Maize | Challenge Research Program | West Africa | Climate-Smart Technologies and Practices |
| CRP 3.4 Roots, Tubers, and Bananas | Challenge Research Program | West Africa | Climate-Smart Technologies and Practices |
| CRP 3.5 Grain Legumes | Challenge Research Program | West Africa | |
| CRP Grain Legumes | Challenge Research Program | South Asia | |
| Cuu Long Delta Rice Research Institute (CLRRI) | National agricultural research and extension services | Southeast Asia | Climate-Smart Technologies and Practices |
| D.Light | Private Research Institution | | |
| Danish Institute for International Studies (DIIS) | Advanced Research Institution | | Climate Services and Safety Nets |
| Data Analysis and Technical Assistance Limited (DATA) | Private Research Institution | South Asia | Climate Services and Safety Nets |
| Deendayal Research Institute (DRI) | Non-governmental organization/Development organization | South Asia | Climate Services and Safety Nets |
| Defence Science and Technology Organisation (DSTO) | Government office/department | | Climate-Smart Technologies and Practices |
| Deltaplan Bangladesh | Other | South Asia | |
| Deltas vulnerability and Climate Change: Migration and Adaptation Project (DECCMA) | Other | | |
| Departamento Nacional de Planeación (DNP) | Government office/department | Latin America | Low Emissions Development |
| Department of Agrarian Development | Government office/department | South Asia | Climate-Smart Technologies and Practices |
| Department of Agricultural Extension Education of Bangladesh Agricultural University (DAEE) | Academic Institution | South Asia | Low Emissions Development |
| Department of Agricultural Extension Services (DAES) | Government office/department | | Climate-Smart Technologies and Practices |
| Department of Agricultural Research Services (DARS) | National agricultural research and extension services | | Climate-Smart Technologies and Practices, Climate Services and Safety Nets |
| Department of Agricultural Technical and Extension Services of Zimbabwe (AGRITEX) | National agricultural research and extension services | | Climate Services and Safety Nets |
