| Last Name Sort ascending | First Name | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Jackson | Stephen | 2018 | Rio de Janeiro | Logic and Foundations |
| Jablonskii | S. V. | 1978 | Helsinki | Discrete Math & math Aspects of Computer Science |
| Jabin | Pierre-Emmanuel | 2018 | Rio de Janeiro | Partial Differential Equations, Mathematics in Science and Technology |
| Izumi | Masaki | 2010 | Hyderabad | Functional Analysis and Applications |
| Iyama | Osamu | 2018 | Rio de Janeiro | Algebra |
| Iwata | Satoru | 2010 | Hyderabad | Control Theory & Optimization |
| Iwasawa | K. | 1950 | Cambridge (USA) | |
| Iwasawa | Kenkichi | 1970 | Nice | Algebra |
| Iwaniec | H. | 1978 | Helsinki | Number Theory |
| Iwaniec | H. | 1986 | Berkeley | Number Theory |
| Iwaniec | Henryk | 2006 | Madrid | Plenary |
| Iwaniec | T. | 1983 | Warszawa | Part. Diff. Equations |
| Ivrii | V. | 1986 | Berkeley | Partial Differential Equations and Dynamic Systems |
| Ivrii | V. A. | 1978 | Helsinki | Part. Diff. Equations |
| Ivanov | Alexander A. | 1990 | Kyoto | Combinatorics |
| Ivanov | Sergei | 2010 | Hyderabad | Geometry |
| Ivanov | Sergei V. | 1998 | Berlin | Algebra |
| Ivanoff | Alexandre | 1932 | Zurich | Probability calculus, insurance mathematics, and statistics |
| Ivaldi | G. | 1928 | Bologna | Elementary Mathematics, Didactical Questions, Mathematical Logic |
| Its | Alexander R. | 2010 | Hyderabad | Analysis |
| Ito | K. | 1962 | Stockholm | Probability & Statistics |
| Itelson | G. | 1908 | Rome | Philosophy, History, and Didactics |
| Itelson | G. | 1912 | Cambridge | Philosophy and History |
| Issaly | 1900 | Paris | Geometry | |
| Ismagilov | R. S. | 1983 | Warszawa | Lie groups & representations |