There are 7 mathematicians whose last name begin with ORB.
| Orbach, Raymond | University of California, Berkeley | 1960 |
| Ørbæk, Peter | Aarhus University | 1997 |
| Orban, Dominique | Université de Namur | 2001 |
| Orbanič, Alen | University of Ljubljana | 2006 |
| Orbe, Clara | Columbia University | 2013 |
| Orbe, Susan | Universidad del País Vasco | 2000 |
| Orbell, John | The University of North Carolina at Chapel Hill | 1965 |