| Last Name Sort ascending | First Name | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Littelmann | Peter | 1994 | Zurich | Algebra |
| Lipshitz | Robert | 2018 | Rio de Janeiro | Topology |
| Lions | J. L. | 1958 | Edinburgh | Classical & Functional Analysis |
| Lions | J. L. | 1970 | Nice | Analysis |
| Lions | J. L. | 1974 | Vancouver | Plenary |
| Lions | Pierre-Louis | 1983 | Warszawa | Control Theory & Optimization |
| Lions | Pierre-Louis | 1990 | Kyoto | Partial Differential Equations |
| Lions | Pierre-Louis | 1994 | Zurich | Plenary/Prize winner |
| Linnik | Ju. V. | 1962 | Stockholm | Algebra & Theory of Numbers |
| Linnik | Yu. V. | 1958 | Edinburgh | Algebra & Theory of Numbers |
| Linial | Nathan | 2002 | Beijing | Combinatorics |
| Linfoot | E. H. | 1932 | Zurich | Algebra and Number Theory |
| Lindner | Rolf | 1974 | Vancouver | Discrete Mathematics & Theory of Computation |
| Linder | Arthur | 1936 | Oslo | Probability Calculus, Mathematical Statistics, Insurance Mathematics, and Econometry |
| Lindenstrauss | Elon | 2006 | Madrid | Ordinary Differential Equations and Dynamical Systems |
| Lindenstrauss | Elon | 2010 | Hyderabad | Plenary/Prize winner |
| Lindenstrauss | Joram | 1970 | Nice | Analysis |
| Lindblad | Hans | 1998 | Berlin | Part. Diff. Equations |
| Lin | Chang-Shou | 2014 | Seoul | Analysis and its Applications |
| Lin | Fang Hua | 1990 | Kyoto | Partial Differential Equations |
| Lin | Huijia (Rachel) | 2022 | Virtual | Special Sectional Lecture |
| Lin | J . P. | 1978 | Helsinki | Topology |
| Lin | Wen-Hsiung | 1983 | Warszawa | Topology |
| Lilienthal | R. v. | 1904 | Heidelberg | Geometry |
| Liggett | T. M. | 1986 | Berkeley | Probability and Mathematical Statistics |