| Last Name Sort descending | First Name | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Osher | Stanley | 2010 | Hyderabad | Plenary |
| Painlevé | P. | 1904 | Heidelberg | Plenary |
| Pandharipande | Rahul | 2018 | Rio de Janeiro | Plenary |
| Papanicolaou | George | 1998 | Berlin | Plenary |
| Parimala | R. | 2010 | Hyderabad | Plenary |
| Parshin | A.N. | 2010 | Hyderabad | Plenary |
| Pauli | W. | 1932 | Zurich | Plenary |
| Peano | G. | 1897 | Zurich | Plenary |
| Pelczynski | A. | 1983 | Warszawa | Plenary |
| Peng | Shige | 2010 | Hyderabad | Plenary |
| Penrose | R. | 1978 | Helsinki | Plenary |
| Perthame | Benoit | 2014 | Seoul | Plenary |
| Piatetski-Shapiro | Ilya I. | 1966 | Moskva | Plenary |
| Picard | E. | 1908 | Rome | Plenary |
| Pierpont | J. | 1924 | Toronto | Plenary |
| Pila | Jonathan | 2014 | Seoul | Plenary |
| Pincherle | S. | 1924 | Toronto | Plenary |
| Pisier | Gilles | 1998 | Berlin | Plenary |
| Plofker | Kim | 2010 | Hyderabad | Plenary |
| Poincaré | H. | 1897 | Zurich | Plenary |
| Poincaré | Henri | 1900 | Paris | Plenary |
| Poincaré | J.H. | 1908 | Rome | Plenary |
| Pontryagin | L. | 1970 | Nice | Plenary |
| Pontryagin | L. S. | 1958 | Edinburgh | Plenary |
| Popa | Sorin | 2006 | Madrid | Plenary |