- Silesian University (Czech Republic)
- Silla University (Korea, South)
- Silliman University (Philippines)
- Silpakorn University (Thailand)
- SIMAD University (Somalia)
- Simon Fraser University (Canada)
- Sinai University (Egypt)
- Sindh Agricultural University (Pakistan)
- Sindh Madressatul Islam University (Pakistan)
- Singapore Institute of Management (SIM) (Singapore)
- Singapore Management University (Singapore)
- Singhania University Rajasthan (India)
- Singidunum University (Serbia)
- Sinnar University (Sudan)
- Sir Syed Institute of Technology Islamabad (Pakistan)
- Sir Syed University of Engineering and Technology (Pakistan)
- Sirte University (Libya)
- Sistan & Balouchestan University (Iran)
- Sistema Universitario Ana G. Méndez (Puerto Rico)
- Skema Business School (France)
- Skrjabin Moscow State Academy of Veterinary Medicine and Biotechnology (Russia)
- Skyline University College (United Arab Emirates)
- Skyway University (Malawi)
- SLIIT | Sri Lanka Institute Of Information Technology (Sri Lanka)
- Slobomir P Univerzitet (Bosnia and Herzegovina)
- Slovak Medical University (Slovakia)
- Slovak University of Agriculture in Nitra (Slovakia)
- Slovak University of Technology in Bratislava (Slovakia)
- SMK Fomra Institute of Technology (India)
- Smolensk Humanitarian University (Russia)
- Smolensk State Medical Academy (Russia)
- Smolny University (Russia)
- Soai University (Japan)
- Södertörn University College (Sweden)
- Sofia University "St. Kliment Ohridski" (Bulgaria)
- Sogang University (Korea, South)
- Sohag Institute of Computer Science & Management Technology (Egypt)
- Sohag University (Egypt)
- Sohar University (Oman)
- Soka University (Japan)
- Sokoine University of Agriculture (Tanzania)
- Sokoto State University (Nigeria)
- Solapur University (India)
- Sol Plaatje University (South Africa)
- Solusi University (Zimbabwe)
- Somaliland University of Technology (Somalia)
- Somali National University (Somalia)
- Sonargaon University (Bangladesh)
- Sonoda Women's University (Japan)
- Soochow University (Taiwan)