| Last Name Sort descending | First Name | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Rapoport | Michael | 1994 | Zurich | Number Theory |
| Rasmadzè | 1928 | Bologna | Analysis | |
| Rasmussen | Jacob | 2022 | Virtual | Topology |
| Rathjen | Michael | 2006 | Madrid | Logic and Foundations |
| Ratib | I. | 1936 | Oslo | Geometry and Topology |
| Ratner | Marina | 1994 | Zurich | Plenary |
| Ravenel | D. C. | 1978 | Helsinki | Topology |
| Raviart | P. A. | 1978 | Helsinki | Numerical Analysis |
| Raynaud | Michel | 1970 | Nice | Algebra |
| Raz | R. | 2002 | Beijing | Mathematical Aspects of Computer Science |
| Razborov | A. A. | 1986 | Berkeley | Mathematical Aspects of Computer Science |
| Razmadzé | A. | 1924 | Toronto | Algebra, Theory of Numbers, Analysis |
| Reddy | Batmanathan Dayanand | 2014 | Seoul | Mathematics in Science and Technology |
| Reed | B. | 2002 | Beijing | Combinatorics |
| Reed | Lowell J. | 1924 | Toronto | Statistics, Actuarial Science, Economics |
| Rees | Mary | 1990 | Kyoto | Ordinary Differential Equations & Dynamical Systems |
| Regev | Oded | 2022 | Virtual | Mathematics of Computer Science |
| Reichstein | Zinovy | 2010 | Hyderabad | Algebra |
| Reid | Alan | 2018 | Rio de Janeiro | Topology |
| Reid | Miles | 2002 | Beijing | Algebraic & Complex Geometry |
| Reidemeister | K. | 1928 | Bologna | Geometry |
| Reingold | Omer | 2006 | Madrid | Mathematical Aspects of Computer Science |
| Reissner | Erich | 1936 | Oslo | Rational and Applied Mechanics |
| Reiten | Idun | 1998 | Berlin | Algebra |
| Reiten | Idun | 2010 | Hyderabad | ICM Emmy Noether Lecture |