| Soil and Land Use Survey Of India | madhya pradesh | 1 | |
| Solapur University | maharashtra | 10 | |
| Solar Energy Corporation Of India Limited | delhi | 13 | |
| Solid State Physics Laboratory | delhi | 16 | |
| Sophisticated Test And Instrumentation Centre | kerala | 1 | |
| South Central Zone Cultural Centre | maharashtra | 3 | |
| South East Central Railway | chhattisgarh | 9 | |
| South Eastern Railway | west bengal | 37 | |
| South Indian Bank | kerala | 677 | |
| South Western Railway | karnataka | 1354 | |
| South Zone Cultural Centre | tamil nadu | 1 | |
| Southern Power Distribution Company of Telangana Limited | andhra pradesh | 267 | |
| Southern Railway | tamil nadu | 840 | |
| Spices Board, India | kerala | 1 | |
| Sports Authority Of India | jharkhand | 1 | |
| Sports Authority Of India | odisha | 1 | |
| Sports Authority Of India | west bengal | 2 | |
| Sports Authority Of India | central government | 201 | |
| Sports Injury Centre | central government | 4 | |
| Sree Chitra Tirunal Institute for Medical Sciences and Technology | kerala | 443 | |
| Sri Aurobindo College, University of Delhi | delhi | 113 | |
| Sri Guru Nanak Dev Khalsa College | delhi | 25 | |
| Sri Guru Tegh Bahadur Khalsa College | delhi | 50 | |
| Sri Konda Laxman Telangana State Horticultural University | telangana | 100 | |
| Sri Padmavati Mahila Visvavidyalayam | andhra pradesh | 7 | |