There are 13 mathematicians whose last name begin with ORC.
| Orcan, Betul | University of Texas at Austin | 2010 |
| Orchard, Bradley | Rensselaer Polytechnic Institute | 1991 |
| Orchard, Dominic | University of Cambridge | 2013 |
| Orchard, Jeffery | University of British Columbia | 1996 |
| Orchard, Michael | Princeton University | 1989 |
| Orchard, Robert | Stevens Institute of Technology | 1978 |
| Orchard, Tristan | King's College London | 2023 |
| Orchard Concha, Marcos | ||
| Orchel, Beata | Uniwersytet Pedagogiczny | 1999 |
| Orchini, Alessandro | University of Cambridge | 2016 |
| Orcholski, Tracy | University of California, Los Angeles | 2011 |
| Orcutt, Bruce | University of Virginia | 1969 |
| Orcutt, Guy | University of Michigan | 1944 |