| Last Name | First Name Sort descending | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Uhlenbeck | Karen | 1990 | Kyoto | Plenary |
| Vogtmann | Karen | 2006 | Madrid | Topology |
| Parshall | Karen Hunger | 1994 | Zurich | History of Mathematics |
| Astala | Kari | 1998 | Berlin | Analysis |
| Vilonen | Kari | 1998 | Berlin | Lie Groups |
| Chemla | Karine | 1998 | Berlin | History of Mathematics |
| Bögel | Karl | 1932 | Zurich | Analysis |
| Dürr | Karl | 1932 | Zurich | Philosophy and History |
| Goldziher | Karl | 1932 | Zurich | Probability calculus, insurance mathematics, and statistics |
| Kunisch | Karl | 2010 | Hyderabad | Mathematics in Science and Technology |
| Mayr | Karl | 1936 | Oslo | Analysis |
| Menger | Karl | 1932 | Zurich | Plenary |
| Menger | Karl | 1936 | Oslo | Geometry and Topology |
| Menger | Karl | 1936 | Oslo | Analysis |
| Rubin | Karl | 2002 | Beijing | Number Theory |
| Sigmund | Karl | 1998 | Berlin | Plenary |
| Strubecker | Karl | 1932 | Zurich | Geometry |
| Borsuk | Karol | 1932 | Zurich | Geometry |
| Borsuk | Karol | 1936 | Oslo | Geometry and Topology |
| Kozlowski | Karol | 2022 | Virtual | Mathematical Physics |
| Grove | Karsten | 1990 | Kyoto | Geometry |
| Mann | Kathryn | 2022 | Virtual | Geometry, Topology |
| Wendland | Katrin | 2010 | Hyderabad | Mathematical Physics |
| Ramanan | Kavita | 2022 | Virtual | Probability |
| Fujiwara | Kazuhiro | 2006 | Madrid | Number Theory |