There are 10 mathematicians whose last name begin with USA.
| Usachev, Aleksandr | Voronezh State University | 2009 |
| Usachev, Aleksandr | University of New South Wales | 2013 |
| Usachev, Leonid | ||
| Usadi, Karin | Indiana University | 1991 |
| Usaini, Salisu | University of Pretoria | 2015 |
| Usami, Yasuo | Massachusetts Institute of Technology | 1983 |
| Ušan, Janez | University of Belgrade | 1971 |
| Usanov, Dimitrii | Vrije Universiteit Amsterdam | 2020 |
| Usas, Alan | Stanford University | 1976 |
| Usatine, Jeremy | Yale University | 2019 |