| Sidho Kanho Birsha University |
| Sidho-Kanho-Birsha University |
| Sidi Mohamed Ben Abdellah University |
| Sidney Sussex College |
| Siemens Ltd |
| Siemens PLM Software Inc |
| SIES College of Arts and Science |
| SIES College of Arts, Science, and Commerce |
| SIES College of Management Studies |
| SIES Graduate School of Technology |
| SIET Institute of Management |
| SIET Institute of Managementh |
| Sigma Institute of Pharmacy |
| Sikkim Manipal College of Nursing |
| Sikkim Manipal Institute of Medical Sciences |
| Sikkim Manipal Institute of Technology |
| Sikkim Manipal Institute of Technology (SMIT) |
| Sikkim Manipal Institute of Technology(A constituent college of Sikkim Manipal University) |
| Sikkim Manipal University |
| Sikkim Manipal University of Distance Education |
| Sikkim University |
| Siksha 'O' Anusandhan University |
| Siksha ‘O’ Anusandhan University |
| Siksha O Anusandhan University |
| Siksha O' Anusandhan University |