There are 5 mathematicians whose last name begin with ORTA.
| Ortaçgil, Ercüment | The Johns Hopkins University | 1985 |
| Ortaglia, Andrew | University of South Carolina | 2012 |
| Ortali, Giulio | Scuola Internazionale Superiore di Studi Avanzati (SISSA) | 2025 |
| Ortali, Giulio | Technische Universiteit Eindhoven | 2025 |
| Ortan, Alexandra | University of Minnesota - Twin Cities | 2017 |