There are 31 mathematicians whose last name begin with ORA.
| Orabi, Ismail | Clarkson University | 1987 |
| Oraby, Tamer | University of Cincinnati | 2008 |
| Oraibi, Zakariya | University of Missouri - Columbia | 2019 |
| Oraichi, Driss | Université du Québec à Montréal | 2002 |
| Orailoglu, Alex | University of Illinois at Urbana-Champaign | 1983 |
| Oral, Evrim | Hacettepe Üniversitesi | 2002 |
| Oral, Haluk | Simon Fraser University | 1989 |
| Orama, Jonathan | Universitat Rovira i Virgili | 2023 |
| Orama, Jonathan | Escola Tècnica Superior d'Enginyeria | 2023 |
| Oramas Mogrovejo, José | Katholieke Universiteit Leuven | 2015 |
| Oran, Ahmad | University of Illinois at Urbana-Champaign | 1990 |
| Oran, Elaine | ||
| Orang, Armin | University of Guelph | 2024 |
| Orang, Marjan | North Carolina State University | 2016 |
| Orange, Carol | Technische Universiteit Delft | 1994 |
| Orange, Sébastien | Université Pierre-et-Marie-Curie - Paris VI | 2006 |
| Orangi-Fard, Negar | Kansas State University | 2020 |
| Oranje, Barto | Comenius University | 1985 |
| Oranje, Barto | Universiteit Utrecht | 1985 |
| Orantin, Nicolas | Université Pierre-et-Marie-Curie - Paris VI | 2009 |
| Orasch, Markus | Carleton University | 1999 |
| Orav, Endel | Stanford University | 1983 |
| Orava, Jussi | ||
| Oravas, Monica | McMaster University | 1993 |
| Oravcova, Katarina | ||
| Oravecz, Zita | Katholieke Universiteit Leuven | 2009 |
| Oraw, Alexis | Bayerische Julius-Maximilians-Universität Würzburg | 1937 |
| Orazem, John | Columbia University | 1991 |
| Orazio, Sebastien | Université Bordeaux 1 | 2008 |
| Orazov, B. | Lomonosov Moscow State University | |
| Orazov, M. | Lomonosov Moscow State University |