| Société Nationale d'Aménagement et d'Exploitation des Terres du Delta du Fleuve Sénégal (SAED) | Non-governmental organization/Development organization | West Africa | Climate Services and Safety Nets |
| Society for Conservation of Natural Resources and Empowerment of Rural Youth (SCNRERY) | Other | South Asia | Low Emissions Development |
| Society for International Development (SID) | Non-governmental organization/Development organization | | |
| Society for International Development - Eastern Africa (SID EA) | Non-governmental organization/Development organization | East Africa | |
| Soil, Water and Environment Research Institute (SWERI) | National agricultural research and extension services | | Climate Services and Safety Nets |
| Sokoine University of Agriculture (SUA) | Academic Institution | East Africa | Climate-Smart Technologies and Practices, Climate Services and Safety Nets, Low Emissions Development |
| South Asia Institute of Applied Studies (SIAS) | Research network | South Asia | |
| Southeast Asian Regional Center for Graduate Study (SEARCA) | Other | Southeast Asia | Climate-Smart Technologies and Practices, Climate Services and Safety Nets |
| Southeast Asian Regional Center for Graduate Study and Research in Agriculture | | | |
| Southern Institute for Water Resource Planning (SIWRP) | Advanced Research Institution | Southeast Asia | Climate-Smart Technologies and Practices |
| Sri Lanka Air Force | Government office/department | South Asia | |
| Stanford University | Academic Institution | | Climate-Smart Technologies and Practices, Climate Services and Safety Nets |
| State Forestry Administration (SFA) | Government office/department | | |
| Statistical Services Centre, University of Reading (SSC-UoR) | Academic Institution | | |
| Stichting Dienst Landbouwkundig Onderzoek (LEI) | Academic Institution | | |
| Stockholm Environment Institute (SEI) | Advanced Research Institution | | Climate-Smart Technologies and Practices |
| Stockholm International Water Institute (SIWI) | Advanced Research Institution | | Climate-Smart Technologies and Practices |
| Stockholm Resilience Centre (SRC) | Academic Institution | | |
| Sustainable Development Policy Institute (SDPI) | Non-governmental organization/Development organization | South Asia | Climate Services and Safety Nets |
| Sustainable Intensification of Maize-Legume Systems for Food Security in Eastern and Southern Africa (SIMLESA) | Research network | | Climate-Smart Technologies and Practices, Climate Services and Safety Nets, Low Emissions Development |
| Swedish University of Agricultural Sciences (SLU) | Academic Institution | | |
| Swiss Agency for Development and Cooperation (SDC) | Non-governmental organization/Development organization | | |
| SYMBIOSE | Non-governmental organization/Development organization | West Africa | Climate Services and Safety Nets |
| Symbiosis Institute of Geoinformatics | Research network | South Asia | Climate Services and Safety Nets |
| Syngenta EA | Private Research Institution | East Africa | |
