There are 34 mathematicians whose last name begin with OY.
| Oya, Hironori | University of Tokyo | 2017 |
| Oya, Simon | Universidad de Vigo | 2019 |
| Oyadare, Olufemi | University of Ibadan | 2016 |
| Oyallon, Edouard | Paris Sciences et Lettres | 2017 |
| Oyama, Daisuke | University of Tokyo | 2003 |
| Oyama-Higa, Mayumi | ||
| Oyapero, Mojisola | Central Michigan University | 2012 |
| Oyarzúa, Ricardo | Universidad de Concepción | 2010 |
| Oyarzun, Diego | ||
| Oyarzun Miranda, Pedro | Landbouwuniversiteit Wageningen | 1994 |
| Oyebanji, Joshua | University of Michigan | 1975 |
| Oyebo, Yakub | Federal University of Agriculture, Abeokuta | 2014 |
| Oyebola, Oyeyemi | Obafemi Awolowo University | 2019 |
| Oyediran, Ayo | Cornell University | 1985 |
| Oyekole, Oyekola | University of Notre Dame | 2020 |
| Oyelami, Michael | University of Ilorin | 2019 |
| Oyelese, John | University of California, Berkeley | 1970 |
| Oyem, Anthony | University of Lagos | 2021 |
| Oyenan, Walamitien (Herve) | Kansas State University | 2010 |
| Oyer, Paul | Princeton University | 1996 |
| Oyet, Alwell | University of Alberta | 1997 |
| Oyewole, Olawale | University of KwaZulu-Natal | 2021 |
| Oyjinda, Pravitra | King Mongkut's Institute of Technology Ladkrabang | 2018 |
| Oykar, Ali | Illinois Institute of Technology | 2000 |
| Oyler-McCance, Sara | Colorado State University | 1999 |
| Oymak, Samet | California Institute of Technology | 2014 |
| Oyman, Ilker | Boğaziçi University | 2004 |
| Oyman, Irfan | Universität Dortmund | 1999 |
| Oyman, Ozgur | Stanford University | 2005 |
| Oyolola, Maharouf | University of Wisconsin-Milwaukee | 2007 |
| Oyonarte Alcalá, Luis Antonio | Universidad de Almería | 1998 |
| Oyono Essam, Roger | Universität Duisburg-Essen | 2006 |
| Oyono Oyono, Hervé | Université Claude Bernard Lyon 1 | 1997 |
| OYoung, Jen Keng (Josh) | University of California, Davis | 2012 |