There are 16 mathematicians whose last name begin with ORI.
| Ori, Ramesh | University of Colorado at Boulder | 1975 |
| Orians, Gordon | University of California, Berkeley | 1960 |
| Oriat, Bernard | Université de Franche-Comté | |
| Oridoroga, Leonid | Donetsk University | 2006 |
| Oriekhov, Dmytro | Universiteit Leiden | 2023 |
| Orieux, Michael | Université Paris IX - Dauphine | 2018 |
| Origlia, Marcos | Universidad Nacional de Córdoba | 2017 |
| Orihuela Calatayud, José | Universidad de Murcia | 1984 |
| Oriolo, Gianpaolo | Università di Roma La Sapienza | 1996 |
| Orispää, Mikko | Oulun yliopisto | 2002 |
| Orita, Ryuma | University of Tokyo | 2017 |
| Oriti, Daniele | University of Cambridge | 2003 |
| Orive, Rafael | Universidad Autónoma de Madrid | 2003 |
| Orive, Rafael | Universidad de Chile | 2003 |
| Orive Rodríguez, Ramón A. | Universidad de La Laguna | 1991 |
| Orizaga, Saulo | Iowa State University | 2014 |