| Norwegian Institute for International Affairs (NUPI) | Advanced Research Institution | | |
| Norwegian University of Science and Technology (NTNU) | Academic Institution | | |
| NSW Trade & Investment | Advanced Research Institution | | Low Emissions Development |
| Office du Niger (ON) | Non-governmental organization/Development organization | West Africa | Climate Services and Safety Nets |
| Office of Livestock & Pasture (OEP) | National agricultural research and extension services | | |
| Oficina Nacional de Semillas (ONS) | Government office/department | Latin America | Climate-Smart Technologies and Practices |
| Oregon State University (OSU) | Academic Institution | | Climate-Smart Technologies and Practices |
| Organization of Economic Cooperation and Development (OECD) | Non-governmental organization/Development organization | | |
| Orissa University of Agriculture & Technology | Academic Institution | South Asia | |
| Oromia Insurance Company | Donors | East Africa | Climate Services and Safety Nets |
| Oromiya Credit and Savings Share Company (OCSSC) | Other | East Africa | |
| Oromiya Insurance Company (OIC) | Other | East Africa | Climate Services and Safety Nets |
| Oromiya Pastoral Area Development Commission (OPADC) | Government office/department | East Africa | |
| Oxfam Great Britain | Non-governmental organization/Development organization | | |
| Oxfam Novib | Non-governmental organization/Development organization | | Climate-Smart Technologies and Practices |
| Oxfam, Horn of Africa Regional Office | Non-governmental organization/Development organization | East Africa | |
| Pakistan Agricultural Research Coucnil (PARC) | National agricultural research and extension services | South Asia | Climate-Smart Technologies and Practices, Climate Services and Safety Nets |
| Palli Karma-Sahayak Foundation (PKSF) | Non-governmental organization/Development organization | South Asia | Climate Services and Safety Nets |
| Pamoja Media | Other | East Africa | |
| Panafrican Farmers' Organization | | | |
| Panos Eastern Africa | Regional Organization | East Africa | |
| Panos South Asia | Regional Organization | South Asia | |
| Parivartan | Non-governmental organization/Development organization | South Asia | Climate Services and Safety Nets |
| Pathikrit | Non-governmental organization/Development organization | South Asia | |
| Pennsylvania State University | Academic Institution | | Climate Services and Safety Nets |
