| Last Name Sort descending | First Name | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Conway | Arthur W. | 1932 | Zurich | Mechanics and Mathematical Physics |
| Conway | J. H. | 1970 | Nice | Algebra |
| Conway | J. H. | 1978 | Helsinki | Mathematical logic & foundations of mathematics |
| Conway | John H. | 1994 | Zurich | Plenary |
| Cook | Stephen A. | 1990 | Kyoto | Plenary |
| Cook | William | 1998 | Berlin | Control Theory & Optimization |
| Cooper | R. | 1936 | Oslo | Analysis |
| Copeland | Arthur H. | 1936 | Oslo | Probability Calculus, Mathematical Statistics, Insurance Mathematics, and Econometry |
| Córdoba | Diego | 2018 | Rio de Janeiro | Partial Differential Equations |
| Corini | F. | 1928 | Bologna | Engineering and Industrial Applications |
| Corlette | Kevin | 1994 | Zurich | Geometry |
| Cormack | Patrick | 1924 | Toronto | Engineering |
| Cornalba | Maurizio | 1998 | Berlin | Algebraic Geometry |
| Cornuejols | Gerard | 2002 | Beijing | Combinatorics |
| Coron | Jean-Michel | 1990 | Kyoto | Partial Differential Equations |
| Coron | Jean-Michel | 2010 | Hyderabad | Plenary |
| Corput | J. van der | 1936 | Oslo | Plenary |
| Corral | J.I. | 1924 | Toronto | Algebra, Theory of Numbers, Analysis |
| Corry | Leo | 2006 | Madrid | History of Mathematics |
| Cortinas | Guillermo | 2014 | Seoul | Algebra |
| Corwin | Ivan | 2014 | Seoul | Mathematical Physics |
| Costa | A.R. da | 1924 | Toronto | Geometry |
| Costa Lobo | F.M. da | 1924 | Toronto | Mechanics, Physics, Astronomy, Geophysics |
| Costello | Kevin | 2010 | Hyderabad | Topology |
| Courant | R. | 1928 | Bologna | Analysis |