| Last Name Sort descending | First Name | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Northcott | D. G. | 1954 | Amsterdam | Algebra & Theory of Numbers |
| Noumi | M. | 2002 | Beijing | Mathematical Physics |
| Novik | Isabella | 2022 | Virtual | Combinatorics |
| Novikov | Dmitry | 2022 | Virtual | Logic |
| Novikov | P. S. | 1962 | Stockholm | Algebra & Theory of Numbers |
| Novikov | S. P. | 1966 | Moskva | 1/2 hr. report |
| Novikov | S. P. | 1970 | Nice | Geometry & Topology/Prize winner |
| Novikov | S. P. | 1978 | Helsinki | Plenary |
| Nowak | Martin A. | 2006 | Madrid | Applications of Mathematics in the Sciences |
| Noy | Marc | 2014 | Seoul | Combinatorics |
| Nualart | David | 2006 | Madrid | Applications of Mathematics in the Sciences |
| Nunn | T.P. | 1912 | Cambridge | Didactics |
| Nussenzveig Lopes | Helena | 2018 | Rio de Janeiro | Partial Differential Equations |
| Nyström | E. J. | 1936 | Oslo | Analysis |
| O'Donnell | Ryan | 2014 | Seoul | Mathematical Aspects of Computer Science |
| Obrechkoff | N. | 1928 | Bologna | Analysis |
| Obrechkoff | Nikola | 1936 | Oslo | Analysis |
| Ocneanu | Adrian | 1990 | Kyoto | Operator Algebras & Functional Analysis |
| Odell | E. | 1994 | Zurich | Operator Algebras & Functional Analysis |
| Odlyzko | A. M. | 1986 | Berkeley | Number Theory |
| Offord | A. C. | 1936 | Oslo | Analysis |
| Ogata | Yoshiko | 2022 | Virtual | Mathematical Physics |
| Oguiso | Keiji | 2014 | Seoul | Algebraic and Complex Geometry |
| Ogura | K. | 1920 | Strasbourg | Arithmetic, Algebra, Analysis |
| Ogus | A. | 1983 | Warszawa | Algebraic Geometry |