There are 21 mathematicians whose last name begin with OSA.
| Osada, Robert | Princeton University | 2006 |
| Osadchenko, Alexander | Moscow Institute of Physics and Technology | 1980 |
| Osadchii, Dmitrii | Technische Universiteit Delft | 2020 |
| Osadchy, Margarita | University of Haifa | 2001 |
| Osadebey, Michael | Concordia University | 2015 |
| Osaisai, Evans | Loughborough University | 2008 |
| Osaiweran, Ammar | Technische Universiteit Eindhoven | 2012 |
| Osajda, Damian | Polska Akademia Nauk | 2004 |
| Osajima, Yasufumi | University of Tokyo | 2008 |
| Osaka, Haruki | University of Sydney | 2022 |
| Osakwe, Patrick | Queen's University at Kingston | 1997 |
| Osan, Remus | University of Pittsburgh | 2002 |
| Osanaiye, Opeyemi | University of Cape Town | 2016 |
| Osanaiye, Peter | University of Essex | 1984 |
| Osançlıol, Alen | Istanbul University | 2013 |
| Osang, Georg | Institute of Science and Technology Austria | 2021 |
| Osano, Bob | University of Cape Town | 2007 |
| Osatake, Tonau | ||
| Osawa, Ryoichi | Purdue University | 2000 |
| Osaye, Fadekemi | University of Johannesburg | 2019 |
| Osayimwese, Ghatekha | Northwestern University | 1974 |