There are 22 mathematicians whose last name begin with ORS.
| Örs, Sıddıka Berna | Katholieke Universiteit Leuven | 2005 |
| Orsak, Geoffrey | Rice University | 1990 |
| Orsáková, Martina | Charles University | 2006 |
| Orsatti, Adalberto | Università degli Studi di Trieste | 1960 |
| Orsatti, Giuseppe | Scuola Internazionale Superiore di Studi Avanzati, Trieste | 2023 |
| Orschulik, Anna Barbara | Universität Hamburg | 2020 |
| Orshan, Gooni | Hebrew University of Jerusalem | 1995 |
| Orshanskiy, Sergey | The Pennsylvania State University | 2010 |
| Orsina, Luigi | Università di Roma La Sapienza | 1996 |
| Orsinger, Heinz | Humboldt-Universität zu Berlin | 1952 |
| Orsingher, Enzo | ||
| Orsini, Chiara | University of Maryland College Park | 2007 |
| Orsini, Emmanuela | Università degli Studi di Milano | 2008 |
| Orso, Samuel | Université de Genève | 2019 |
| Orson, Patrick | The University of Edinburgh | 2015 |
| Orsoni, Marcu-Antone | Université de Bordeaux | 2021 |
| Ørsted, Bent | Massachusetts Institute of Technology | 1976 |
| Ørsted, Hans | Københavns Universitet | 1797 |
| Ørsted, Hans | Københavns Universitet | 1799 |
| Ørsted, Hans | Friedrich-Schiller-Universität Jena | 1801 |
| Orszag, J. Michael | University of Michigan | 1994 |
| Orszag, Steven | Princeton University | 1966 |