There are 5 mathematicians whose last name begin with ISSB.
| Isbell, John | Princeton University | 1954 |
| Isbell, Jr., Charles | Massachusetts Institute of Technology | 1998 |
| Isberner, Malte | Technische Universität Dortmund | 2015 |
| Isbister, John | Princeton University | 1969 |
| Isbister, Katherine | Stanford University | 1998 |