| Last Name Sort ascending | First Name | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Rohn | K. | 1904 | Heidelberg | Geometry |
| Rognes | John | 2014 | Seoul | Topology |
| Roggenkamp | Klaus W. | 1990 | Kyoto | Algebra |
| Rogers | C. A. | 1974 | Vancouver | Geometry |
| Rogers | James Harvey | 1924 | Toronto | History, Philosophy, Didactics |
| Roever | W.H. | 1924 | Toronto | Engineering |
| Rodriguez Hertz | Federico | 2010 | Hyderabad | Dynamical Systems and Ordinary Differential Equations |
| Rodnianski | Igor | 2006 | Madrid | Mathematical Physics |
| Rödl | Vojtech | 1990 | Kyoto | Combinatorics |
| Rödl | Vojtĕch | 2014 | Seoul | Plenary |
| Rockafellar | R. T. | 1983 | Warszawa | Control Theory & Optimization |
| Robinson | A. | 1950 | Cambridge (USA) | Logic & Philosophy |
| Robinson | Abraham | 1970 | Nice | Mathematical Logic |
| Roberts | Paul C. | 1990 | Kyoto | Algebra |
| Robert | Aline | 1998 | Berlin | Teaching & Popularization of Mathematics |
| Robert | Raoul | 1994 | Zurich | Applications of Mathematics in the Sciences |
| Robbiano | Luc | 2014 | Seoul | Control Theory and Optimization |
| Riviere | Tristan Joel | 2002 | Beijing | Part. Diff. Equations |
| Ritt | J. F. | 1950 | Cambridge (USA) | Plenary |
| Ritt | J.H. | 1924 | Toronto | Algebra, Theory of Numbers, Analysis |
| Ritov | Y. | 2002 | Beijing | Prob & Stats |
| Risser | R. | 1924 | Toronto | Mechanics, Physics, Astronomy, Geophysics |
| Risser | R. | 1928 | Bologna | Statistics, Mathematical Economics, Probability Calculus, Actuarial Sciences |
| Risser | R. | 1932 | Zurich | Probability calculus, insurance mathematics, and statistics |
| Rips | E. | 1994 | Zurich | Topology |