| Last Name Sort ascending | First Name | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Knoblauch | J. | 1904 | Heidelberg | Geometry |
| Kneser | M. | 1962 | Stockholm | Algebra & Theory of Numbers |
| Knaster | B. | 1928 | Bologna | Analysis |
| Knaster | Bronislaw | 1932 | Zurich | Geometry |
| Knapp | A. W. | 1974 | Vancouver | Operator Algebras, Harmonic Analysis & Representation of Groups |
| Klyachko | Alexander | 2002 | Beijing | Lie Groups |
| Kloosterman | H. D. | 1950 | Cambridge (USA) | Algebra & Theory of Numbers |
| Klingler | Bruno | 2022 | Virtual | Algebraic and Complex Geometry, Number Theory |
| Klingenberg | W. | 1966 | Moskva | Geometry |
| Kleshchev | Alexander | 2014 | Seoul | Lie Theory and Generalizations |
| Kleitman | D. J. | 1974 | Vancouver | Discrete Mathematics & Theory of Computation |
| Kleiner | Bruce | 2006 | Madrid | Geometry |
| Kleiner | Bruce | 2022 | Virtual | Special Sectional Lecture |
| Kleinberg | Jon M. | 2006 | Madrid | Mathematical Aspects of Computer Science/Prize winner |
| Klein | F. | 1897 | Zurich | Plenary |
| Klein | F. | 1904 | Heidelberg | Applied Mathematics |
| Kleiman | Steven L. | 1970 | Nice | Algebra |
| Kleene | S. C. | 1950 | Cambridge (USA) | Logic & Philosophy |
| Kleene | S. C. | 1958 | Edinburgh | Plenary |
| Klee | Victor | 1974 | Vancouver | Geometry |
| Klartag | Boáz | 2006 | Madrid | Operator Algebras and Functional Analysis |
| Klainerman | S. | 1983 | Warszawa | Part. Diff. Equations |
| Kjeldsen | TinneHoff | 2010 | Hyderabad | History of Mathematics |
| Kisin | Mark | 2010 | Hyderabad | Number Theory |
| Kiselev | Alexander | 2018 | Rio de Janeiro | Partial Differential Equations |