There are 15 mathematicians whose last name begin with OBI.
| Obi, Chike | University of Cambridge | 1950 |
| Obi, Emman | University of Toledo | 1971 |
| Obi, Gabriel | Cornell University | 1974 |
| Obi, Onyekachukwu | University of Pittsburgh | 2010 |
| Obiedat, Hamed | New Mexico State University | 2005 |
| Obiedat, Mohammad | Middle East Technical University | 1998 |
| Obieglo, Andreas | ETH Zürich | 2000 |
| Obien, Jonathan | University of Alabama-Birmingham | 1996 |
| Obiero, Ben | University of Nairobi | 2016 |
| Obilade, Titilola | Trinity College, Dublin | 1981 |
| Obimbo, Charlie | University of New Brunswick | 2000 |
| Obinger, Herbert | Universität Wien | 1998 |
| Obinna, Enukoha | ||
| Obiols-Homs, Francesc | Universitat Pompeu Fabra | 1996 |
| Obiri, Moses | Montana State University | 2020 |