| International Centre for Climate Change And Development (ICCAD) | Research network | South Asia | |
| International Centre for Integrated Mountain Development (ICIMOD) | Regional Organization | South Asia | Climate-Smart Technologies and Practices, Climate Services and Safety Nets |
| International Committee On New Integrated Climate change assessment Scenarios (ICONICS) | Academic Institution | | |
| International Cooperation and Development Fund (TaiwanICDF) | | 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 |
| International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) | CGIAR Center | South Asia | Climate-Smart Technologies and Practices, Low Emissions Development, Climate Services and Safety Nets, Gender and Social Inclusion |
| International Development Enterprise (iDE) | Advanced Research Institution | | Climate Services and Safety Nets |
| International Development Research Centre (IDRC) | Advanced Research Institution | | Gender and Social Inclusion |
| International Food Policy Research Institute (IFPRI) | CGIAR Center | | Climate-Smart Technologies and Practices, Low Emissions Development, Climate Services and Safety Nets, Gender and Social Inclusion |
| International Fund for Agricultural Development (IFAD) | Other | | Low Emissions Development, Climate Services and Safety Nets, Gender and Social Inclusion |
| International Institute for Applied Systems Analysis (IIASA) | Advanced Research Institution | | Climate-Smart Technologies and Practices, Low Emissions Development |
| International Institute for Environment and Development (IIED) | Advanced Research Institution | | |
| International Institute for Sustainable Development (IISD) | Private Research Institution | | |
| International Institute of Rural Reconstruction | | | |
| International Institute of Tropical Agriculture (IITA) | CGIAR Center | West Africa | Climate-Smart Technologies and Practices, Low Emissions Development |
| International Livestock Research Institute (ILRI) | CGIAR Center | East Africa | Climate-Smart Technologies and Practices, Low Emissions Development, Climate Services and Safety Nets, Gender and Social Inclusion |
| International Maize and Wheat Improvement Center (CIMMYT) | CGIAR Center | Latin America | Climate-Smart Technologies and Practices, Low Emissions Development, Climate Services and Safety Nets, Gender and Social Inclusion |
| International Plant Nutrition Institute (IPNI) | Advanced Research Institution | | Climate Services and Safety Nets, Low Emissions Development |
| International Potato Center (CIP) | | | |
| International Research Institute for Climate and Society (IRI) | Advanced Research Institution | | Climate Services and Safety Nets |
| International Research Institute for Climate and Society, Columbia University | | | |
| International Rice Research Institute (IRRI) | CGIAR Center | Southeast Asia | Climate-Smart Technologies and Practices, Low Emissions Development, Climate Services and Safety Nets, Gender and Social Inclusion |
| International Social Science Council (ISSC) | Advanced Research Institution | | |
| International Soil Reference and Information Centre (ISRIC) | Government office/department | Southeast Asia | Low Emissions Development |
| International Treaty on Plant Genetic Resources for Food and Agriculture (governing body) (ITPGRFA) | Other | | Climate-Smart Technologies and Practices |
| International Union for Conservation of Nature (IUCN) | Non-governmental organization/Development organization | West Africa | |
