| Last Name | First Name Sort descending | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Ein | Lawrence | 2006 | Madrid | Algebraic and Complex Geometry |
| Markus | Lawrence | 1974 | Vancouver | Control Theory & Related Optimization Problems |
| Guo | Lei | 2002 | Beijing | Application of Mathematics in the Sciences |
| Ásgeirsson | Leifur | 1936 | Oslo | Analysis |
| Carleson | Lennart | 1990 | Kyoto | Ordinary Differential Equations & Dynamical Systems |
| Blum | Lenore | 1990 | Kyoto | Mathematical Aspects of Computer Science |
| Corry | Leo | 2006 | Madrid | History of Mathematics |
| Autonne | Leon | 1900 | Paris | Number Theory and Algebra |
| Brillouin | Léon | 1924 | Toronto | Mechanics, Physics, Astronomy, Geophysics |
| Levin | Leonid | 1994 | Zurich | Mathematical Aspects of Computer Science |
| Polterovich | Leonid | 1998 | Berlin | Differential Geometry and Global Analysis |
| Tonelli | Leonida | 1928 | Bologna | Plenary |
| Tonelli | Leonida | 1932 | Zurich | Analysis |
| Greengard | Leslie | 1998 | Berlin | Applications |
| Saper | Leslie | 1990 | Kyoto | Algebraic Geometry |
| Bowen | Lewis | 2018 | Rio de Janeiro | Analysis and Operator Algebras, Dynamical Systems and Ordinary Differential Equations |
| Ying | Lexing | 2022 | Virtual | Numerical Analysis and Scientific Computing |
| Pierce | Lillian B. | 2022 | Virtual | Number Theory, Analysis |
| Ge | Liming | 2002 | Beijing | Operator Algebras & Functional Analysis |
| Rothschild | Linda | 2006 | Madrid | Analysis |
| Trefethen | Lloyd N. | 1998 | Berlin | Numerical Analysis |
| Merel | Loic | 1998 | Berlin | Number Theory |
| Díaz | Lorenzo | 2018 | Rio de Janeiro | Dynamical Systems and Ordinary Differential Equations |
| van den Dries | Lou | 2018 | Rio de Janeiro | Logic and Foundations |
| van den Dries | Lou P. | 1990 | Kyoto | Mathematical Logic & Foundations |