| Small Industries Development Bank Of India | tamil nadu | 2 | |
| Smugglers And Foreign Exchange Manipulators | maharashtra | 2 | |
| Snow & Avalanche Study Establishment, Research & Development Centre | punjab | 1 | |
| Social Defence Department | tamil nadu | 16 | |
| Society for Applied Microwave Electronic Engineering and Research | maharashtra | 1 | |
| Society For Electronic Transactions And Security | tamil nadu | 1 | |
| Society For Integrated Coastal Management | delhi | 5 | |
| Society For Promotion Of Vocational & Technical Education | andaman nicobar islands | 8 | |
| Software Engineering Review Board | madhya pradesh | 1 | |
| Software Technology Parks of India | tamil nadu | 2 | |
| Software Technology Parks of India | delhi | 2 | |
| Soil and Land Use Survey Of India | central government | 3 | |
| Soil and Land Use Survey Of India | madhya pradesh | 1 | |
| Solapur University | maharashtra | 8 | |
| Solar Energy Corporation Of India Limited | delhi | 6 | |
| Solid State Physics Laboratory | delhi | 1 | |
| Sophisticated Test And Instrumentation Centre | kerala | 1 | |
| South Andaman | andaman nicobar islands | 8 | |
| South Central Zone Cultural Centre | maharashtra | 2 | |
| South East Central Railway | chhattisgarh | 1 | |
| South Eastern Railway | west bengal | 1 | |
| South Indian Bank | kerala | 11 | |
| South Western Railway | karnataka | 7 | |
| South Zone Cultural Centre | tamil nadu | 1 | |
| Southern Power Distribution Company of Telangana Limited | andhra pradesh | 2 | |