| Last Name Sort ascending | First Name | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Rouchon | Pierre | 2014 | Seoul | Control Theory and Optimization |
| Rothschild | Linda | 2006 | Madrid | Analysis |
| Roth | K. F. | 1958 | Edinburgh | Plenary/Prize winner |
| Rota | G. -C. | 1978 | Helsinki | Discrete Math & math Aspects of Computer Science |
| Rost | Markus | 2002 | Beijing | Algebra |
| Rossman | Benjamin | 2018 | Rio de Janeiro | Mathematical Aspects of Computer Science |
| Rossi | H. E. | 1966 | Moskva | Algebraic geometry & complex manifolds |
| Rosenblatt | A. | 1928 | Bologna | Geometry |
| Rosenblatt | A. | 1928 | Bologna | Mechanics, Astronomy, Geodesy, Mathematical Physics, Theoretical Physics |
| Rosenblatt | Alfred | 1932 | Zurich | Mechanics and Mathematical Physics |
| Rosebrugh | T.R. | 1924 | Toronto | Algebra, Theory of Numbers, Analysis |
| Rosebrugh | T.R. | 1924 | Toronto | Engineering |
| Rosati | C. | 1928 | Bologna | Geometry |
| Ros | Antonio | 2006 | Madrid | Geometry |
| Rordam | Mikael | 2006 | Madrid | Operator Algebras and Functional Analysis |
| Roquette | P. | 1958 | Edinburgh | Algebra & Theory of Numbers |
| Roque | Tatiana | 2018 | Rio de Janeiro | History of Mathematics |
| Rong | Xiaochun | 2002 | Beijing | Differential Geometry |
| Rome | A. | 1950 | Cambridge (USA) | Plenary |
| Romberg | Tom | 2002 | Beijing | Mathematics Education & Popularization of Mathematics |
| Romanovsky | V. | 1928 | Bologna | Statistics, Mathematical Economics, Probability Calculus, Actuarial Sciences |
| Romanovsky | V. | 1932 | Zurich | Probability calculus, insurance mathematics, and statistics |
| Rokhlin | Vladimir | 1994 | Zurich | Numerical Analysis & Scientific Computing |
| Roiter | A. V. | 1978 | Helsinki | Algebra |
| Röhrl | Helmut | 1970 | Nice | Geometry & Topology |