| Last Name Sort ascending | First Name | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Lorentz | H.A. | 1908 | Rome | Plenary |
| Lopez De Medrano | Santiago | 1970 | Nice | Geometry & Topology |
| Loperfido | A. | 1928 | Bologna | Engineering and Industrial Applications |
| Looijenga | E. | 1978 | Helsinki | Algebraic Geometry |
| Longo | Roberto | 1994 | Zurich | Mathematical Physics |
| Long | M. | 1932 | Zurich | Geometry |
| Long | Yiming | 2002 | Beijing | Differential Geometry |
| Lojasiewicz | S. | 1970 | Nice | Geometry & Topology |
| Lohkamp | Joachim | 1998 | Berlin | Differential Geometry and Global Analysis |
| Logunov | Alexander | 2018 | Rio de Janeiro | Geometry, Partial Differential Equations |
| Loewy | A. | 1904 | Heidelberg | Arithmetic and Algebra |
| Loeser | François | 2014 | Seoul | Logic and Foundations, Algebraic and Complex Geometry |
| Loeffler | David | 2022 | Virtual | Number Theory |
| Loeb | P.A. | 1983 | Warszawa | Mathematical logic & foundations of mathematics |
| Locher | L. | 1936 | Oslo | Geometry and Topology |
| Locher | L. | 1936 | Oslo | Logic, Philosophy, and History |
| Liverani | Carlangelo | 2018 | Rio de Janeiro | Dynamical Systems and Ordinary Differential Equations, Mathematical Physics |
| Liu | Chiu-Chu Melissa | 2010 | Hyderabad | Algebraic Geometry |
| Liu | Gang | 2022 | Virtual | Geometry |
| Liu | Kefeng | 2002 | Beijing | Mathematical Physics |
| Liu | Tai-Ping | 2002 | Beijing | Part. Diff. Equations |
| Liu | Xiaobo | 2006 | Madrid | Geometry |
| Liu | Yi | 2022 | Virtual | Topology |
| Littlewood | J. E. | 1932 | Zurich | Analysis |
| Littlewood | J.E. | 1912 | Cambridge | Arithmetic, Algebra, Analysis |