| Last Name | First Name | Year | City | Section/Speaker Type Sort descending |
|---|---|---|---|---|
| Janiszewski | Z. | 1912 | Cambridge | Geometry |
| Januszkiewicz | Tadeusz | 2010 | Hyderabad | Geometry |
| Johansson | Ingebrigt | 1932 | Zurich | Geometry |
| Jordan | C. | 1920 | Strasbourg | Geometry |
| Juel | C. | 1928 | Bologna | Geometry |
| Juvet | G. | 1928 | Bologna | Geometry |
| Kapouleas | Nikolaos | 1994 | Zurich | Geometry |
| Kapovich | Michael | 2006 | Madrid | Geometry |
| Kasner | E. | 1912 | Cambridge | Geometry |
| Kasner | E. | 1928 | Bologna | Geometry |
| Kasner | Edward | 1932 | Zurich | Geometry |
| Kaufmann | B. | 1932 | Zurich | Geometry |
| Kawaguchi | A. | 1928 | Bologna | Geometry |
| Kharlamov | V. A. | 1978 | Helsinki | Geometry |
| Khovanskii | A. G. | 1983 | Warszawa | Geometry |
| Kirwan | Frances | 1994 | Zurich | Geometry |
| Klee | Victor | 1974 | Vancouver | Geometry |
| Kleiner | Bruce | 2006 | Madrid | Geometry |
| Klingenberg | W. | 1966 | Moskva | Geometry |
| Knaster | Bronislaw | 1932 | Zurich | Geometry |
| Knoblauch | J. | 1904 | Heidelberg | Geometry |
| Koenigs | G. | 1924 | Toronto | Geometry |
| König | D. | 1912 | Cambridge | Geometry |
| Krebs | H. | 1932 | Zurich | Geometry |
| Kronheimer | Peter B. | 1990 | Kyoto | Geometry |