| Columbia University | Academic Institution | | Climate-Smart Technologies and Practices, Low Emissions Development, Climate Services and Safety Nets, Gender and Social Inclusion |
| Comisión de Acción Social Menonita (CASM) | Organización No Gubernamental | Latin America | Priorities and Policies for CSA, Climate-Smart Technologies and Practices, Low Emissions Development, Climate Services and Safety Nets, Gender and Social Inclusion, Scaling Climate-Smart Agriculture |
| Comision nacional de recursos fitogeneticos de Panama (CONARFIP) | Government office/department | Latin America | Climate-Smart Technologies and Practices |
| Comité Diocésain de Développement de Maroua (CDD) | Non-governmental organization/Development organization | | |
| Comité National sur les Changements Climatiques (COMNAC) | Government office/department | West Africa | |
| Comité permanent Inter-Etats de Lutte contre la Sécheresse dans le Sahel (CILSS) | Regional Organization | West Africa | Climate-Smart Technologies and Practices, Low Emissions Development |
| Commissariat à la Sécurité Alimentaire | Government office/department | West Africa | |
| Commission on Genetic Resources for Food and Agriculture (CGRFA) | Other | | Climate-Smart Technologies and Practices |
| Common Market for Eastern and Southern Africa (COMESA) | Regional Organization | | |
| Commonwealth Scientific and Industrial Research Organisation (CSIRO) | Advanced Research Institution | | Climate-Smart Technologies and Practices |
| Communicator | Private Research Institution | South Asia | |
| Community crafts association of the Philippines (cccap) | Challenge Research Program | Southeast Asia | Climate Services and Safety Nets |
| Community initiative facilitation and assistance (CIFA) | Non-governmental organization/Development organization | East Africa | Climate Services and Safety Nets |
| Community Integrated Development Initiatives (CIDI) | Non-governmental organization/Development organization | East Africa | |
| Concordia University | Academic Institution | | Climate-Smart Technologies and Practices |
| Conseil national de l'environnement et du développement durable (CONEDD) | Government office/department | West Africa | Climate-Smart Technologies and Practices, Low Emissions Development |
| Conseil National de l'Environnement pour un Développement Durable (Niger) (CNEDD) | Government office/department | West Africa | |
| Conseil Ouest et Centre Africain pour la Recherche et le Developpement Agricoles (CORAF) | Regional Organization | West Africa | Climate-Smart Technologies and Practices, Low Emissions Development |
| Consejo Agropecuario Centroamericano (CAC) | Regional Organization | Latin America | Climate-Smart Technologies and Practices |
| Conservation Society of Sierra Leone (CSSL) | National agricultural research and extension services | West Africa | |
| Consumer Unity and Trust Society (CUTS) | Non-governmental organization/Development organization | South Asia | |
| Convention on Biological Diversity (CBD) | Other | | Climate-Smart Technologies and Practices |
| Cooperative for Assistance and Relief Everywhere (CARE) | Non-governmental organization/Development organization | | Climate-Smart Technologies and Practices, Low Emissions Development, Gender and Social Inclusion |
| Coopers K Brands | Private Research Institution | East Africa | |
| Coordinating Secretariat for Science Technology and Innovation (COSTI) | Government office/department | South Asia | |
