| 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 | |
| Southern Railway | tamil nadu | 3 | |
| Spices Board, India | kerala | 1 | |
| Sports Authority Of India | west bengal | 1 | |
| Sports Authority Of India | central government | 23 | |
| Sports Authority Of India | jharkhand | 1 | |
| Sports Authority Of India | odisha | 1 | |
| Sports Injury Centre | central government | 1 | |
| Sree Chitra Tirunal Institute for Medical Sciences and Technology | kerala | 256 | |
| Sri Aurobindo College, University of Delhi | delhi | 7 | |
| Sri Guru Nanak Dev Khalsa College | delhi | 1 | |
| Sri Guru Tegh Bahadur Khalsa College | delhi | 1 | |
| Sri Konda Laxman Telangana State Horticultural University | telangana | 3 | |
| Sri Padmavati Mahila Visvavidyalayam | andhra pradesh | 3 | |
| Sri Venkateswara College | delhi | 1 | |