- Obafemi Awolowo University Ile-Ife (Nigeria)
- Ocean University of China (China)
- October 6 university (Egypt)
- Oda Bultum University (Ethiopia)
- Odessa National Academy of Food Technologies (Ukraine)
- Odessa National I.I. Mecnikov University (Ukraine)
- Odlar Yurdu University (Azerbaijan)
- Oduduwa University (Nigeria)
- Okan University (Turkey)
- Olabisi Onabanjo University (Nigeria)
- Olympia College (Malaysia)
- Oman College Of Management & Technology (Oman)
- Omar Al-Mukhtar University (Libya)
- Omdurman Ahlia University (Sudan)
- Omdurman Islamic University (Sudan)
- Omsk State Pedagogical University (Russia)
- onal Taipei University of Nursing and Health Sciences (Taiwan)
- Ondokuz Mayis University Samsun (Turkey)
- Ondo State University of Science and Technology (Nigeria)
- Open University Malaysia (Malaysia)
- Open University of Hong Kong (Hong Kong)
- Open University of Sudan (Sudan)
- Open University of Sudan (OUS) (Sudan)
- Oriental University Indore (India)
- Orkhon University (Mongolia)
- Osmangazi University (Turkey)
- Osun State University (Nigeria)
- Our Lady of Fatima University (Philippines)
- Ozyegin University (Turkey)
- Pak-AIMS (Institute of Management Sciences) (Pakistan)
- Pakistan Institute of Engineering and Applied Sciences (PIEAS) (Pakistan)
- Pakistan Virtual University (Pakistan)
- Paktia University (Afghanistan)
- Palawan State University (Philippines)
- Palestine Polytechnic University (Palestine)
- Palestine Technical College-Dier Elbalah (Palestine)
- Palestine Technical University - Kadoorie (Palestine)
- Pamir University (Afghanistan)
- Pampanga State Agricultural University (Philippines)
- Pamukkale University (Turkey)
- Pan African Christian University College (Ghana)
- Pan-African University (Nigeria)
- Pangasinan State University (Philippines)
- Pannnasatra University of Cambodia (Cambodia)
- Panzhihua University (China)
- Partido State University (Philippines)
- Parwan University (Afghanistan)
- Paul University (Nigeria)
- Pedagogical University of the Polish Association for Adult Education in Warsaw (Poland)
- Peking University (China)