There are 23 mathematicians whose last name begin with OBA.
| Oba, Marilyn | University of Southern California | 1970 |
| Oba, Roger | New York University | 1988 |
| Oba, Takahiro | Tokyo Institute of Technology | 2017 |
| Obabiyi, O. | University of Ibadan | 2002 |
| Obada, Abdel-Shafy | Victoria University of Manchester | 1967 |
| Obadimu, Adewale | University of Arkansas at Little Rock | 2020 |
| Obadimu, Solomon | University of Limerick | 2022 |
| Obaid, Abdellatif | University of Ottawa | 1991 |
| Obaid, Hasim | ||
| Obaid, Mohammad | University of Canterbury | 2011 |
| Obaid, Samih | The Pennsylvania State University | 1977 |
| Obaisi, Razan | Rutgers University, Newark | 2000 |
| Oballe, Christopher | University of Tennessee - Knoxville | 2020 |
| Obame Nguema, Maurice Saint Clair | 2011 | |
| Obandi, Dzhamhur | Voronezh State University | 2015 |
| Obara, Ichiro | University of Pennsylvania | 2001 |
| Obara, Samuel | University of Georgia | 2006 |
| Obasi, Godwin | Massachusetts Institute of Technology | 1963 |
| Obata, Davi | Universidade Federal do Rio de Janeiro | 2019 |
| Obata, Davi | Université Paris-Sud XI - Orsay | 2019 |
| Obata, Kenji | University of California, Berkeley | 2006 |
| Obawole, A. | ||
| Obaya García, Rafael | Universidad de Valladolid | 1984 |