There are 14 mathematicians whose last name begin with BIRN.
| Birnbaum, Allan | Columbia University | 1954 |
| Birnbaum, Benjamin | University of Washington | 2012 |
| Birnbaum, Dionysus | Oregon State University | 2020 |
| Birnbaum, Joel | Yale University | 1966 |
| Birnbaum, Lawrence | Yale University | 1986 |
| Birnbaum, Michael | University of California, Los Angeles | 1972 |
| Birnbaum, Sidney | University of Colorado at Boulder | 1965 |
| Birnbaum, Walter | Georg-August-Universität Göttingen | 1924 |
| Birnbaum, Z. W. (Bill) | University of Lwów | 1929 |
| Birner, Matthias | Rheinische Friedrich-Wilhelms-Universität Bonn | 2023 |
| Birner, Michael | Universität Bayreuth | 2000 |
| Birnie, Derk | Rijksuniversiteit Groningen | 1991 |
| Birnir, Björn | New York University | 1981 |
| Birns, Samuel | University of Hawaii | 2023 |