There are 9 mathematicians whose last name begin with OPA.
| Opalecky, Robert | University of North Texas | 1997 |
| Opaluch, James | University of California, Berkeley | 1981 |
| Opanasenko, Stanislav | Institute of Mathematics of National Academy of Sciences of Ukraine | 2021 |
| Oparin, Vsevolod | St. Petersburg Academic University | 2016 |
| Oparnica, Ljubica | Universität Wien | 2008 |
| Opaswongkarn, Kongkiat | University of Pennsylvania | 1984 |
| Opatowski, Izaak | ||
| Opatrny, Jaroslav | University of Waterloo | 1975 |
| Opazo, Maria | Columbia University | 2014 |