There are 35 mathematicians whose last name begin with OJ.
| Oja, Erkki | Teknillinen korkeakoulu | 1977 |
| Oja, Eve | University of Tartu | 1975 |
| Oja, Hannu | Oulun yliopisto | 1981 |
| Oja, Kirsti | Helsingin yliopisto | 1979 |
| Oja, Peeter | University of Tartu | 1975 |
| Ojah, Kanan | Tezpur University | 2013 |
| Ojakian, Kerry | Carnegie Mellon University | 2004 |
| Ojala, Arto | Jyväskylän yliopisto | 2008 |
| Ojala, Timo | Oulun yliopisto | 1997 |
| Ojala, Tuomo | Jyväskylän yliopisto | 2014 |
| Ojalehto, Vesa | Jyväskylän yliopisto | 2014 |
| Ojan, Hussain | University of Colorado at Boulder | 1992 |
| Ojanen, Harri | Rutgers University, New Brunswick | 1999 |
| Ojanguren, Manuel | ETH Zürich | 1968 |
| Ojea, Ignacio | Universidad de Buenos Aires | 2014 |
| Ojeda, Diana | The American University | 2001 |
| Ojeda, Eduardo | Humboldt-Universität zu Berlin | 1983 |
| Ojeda, Fabian | Katholieke Universiteit Leuven | 2011 |
| Ojeda, Jacqueline | ||
| Ojeda, Silvia | Universidad Nacional de Córdoba | 1999 |
| Ojeda-Aciego, Manuel | Universidad de Málaga | 1996 |
| Ojeda Aristizabal, Diana | Cornell University | 2014 |
| Ojeda Bär, Nicolás | The University of Chicago | 2012 |
| Ojeda Echevarria, Francisco | Lehigh University | 2006 |
| Ojeda Martínez de Castilla, Ignacio | Universidad de Sevilla | 2000 |
| Ojeda-Ruiz, Ivan | University of Texas at Arlington | 2017 |
| Ojeda Salazar, Ana Maria | King's College London | 1994 |
| Ojeda Santana, Juan Salvador | Ruhr-Universität Bochum | 2020 |
| Ojewole, Adegoke | Duke University | 2018 |
| Ojha, Aparajita | 1987 | |
| Ojha, Murari Prasad | Oregon State University | 1982 |
| Ojha, Vivek | University of Michigan | 2022 |
| Ojiambo, Peter | ||
| Ojwang, Julius | Technische Universiteit Eindhoven | 2009 |
| Ojwang, Maureiq | North Carolina State University | 2021 |