There are 33 mathematicians whose last name begin with ORO.
| Orobio de Castro, Bram | Vrije Universiteit Amsterdam | 2000 |
| Orobitg Huguet, Joan | Universitat Autònoma de Barcelona | 1990 |
| Orochko, Yurii | Institute of Mathematics of the National Academy of Sciences of Ukraine | 1967 |
| Oron, Assaf | University of Washington | 2007 |
| Oron, Daniel | Hebrew University of Jerusalem | 2004 |
| Oronzio, Francesca | Università degli Studi di Napoli Federico II | 2022 |
| Oropesa, Leticia | University of Miami | 1993 |
| Oropeza, Alip | Université de Rouen | 2016 |
| Ororbia II, Alexander G. | The Pennsylvania State University | 2018 |
| Oros, Georgia | Babeş-Bolyai University | 2006 |
| Oros, Gheorghe | Babeş-Bolyai University | 1998 |
| Orosco, Jeremy | University of California, San Diego | 2019 |
| Oróstica, Karen | Universidad de Chile | 2021 |
| Orosz, Ágota | University of Debrecen | 2012 |
| Orosz, Brooke | City University of New York | 2009 |
| Orosz, Gabor | University of Bristol | 2006 |
| Orosz, Luiz | Rice University | 1983 |
| Orosz, Victor | Uzhhorod National University | 1993 |
| Orosz Hunziker, Florencia | Yale University | 2019 |
| Orou Chabi, Jean | Institut de Mathématiques et de Sciences Physiques | 1994 |
| Orović, Josip | University of Rijeka | 2012 |
| Orovitz, Joav | Ben-Gurion University of the Negev | 2020 |
| Orowan, Egon | Technische Universität Berlin | 1932 |
| Orowe, Idah | University of Nairobi | 2016 |
| Orozco, Edusmildo | University of Puerto Rico at Mayaguez | 2005 |
| Orozco, Javier | Universidad Autónoma de Barcelona | 2009 |
| Orozco-Alemán, Sandra | University of Pittsburgh | 2011 |
| Orozco-Barbosa, Luis | ||
| Orozco Bohorquez, Cindy | Stanford University | 2021 |
| Orozco del Pino, Pedro | University of Michigan | 2022 |
| Orozco García, Juan | University of Puerto Rico, Rio Piedras | 2017 |
| Orozco Ruiz, Fernando | Rice University | 1994 |
| Orozco-Zitli, Fernando | Universidad Nacional Autónoma de México (UNAM) | 2001 |