| Last Name | First Name Sort descending | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Geppert | Harald | 1932 | Zurich | Analysis |
| Geppert | Harald | 1936 | Oslo | Geometry and Topology |
| Helfgott | Harald | 2014 | Seoul | Number Theory, Combinatorics |
| Niederreiter | Harald | 1998 | Berlin | Combinatorics |
| Kushner | Harold J. | 1974 | Vancouver | Control Theory & Related Optimization Problems |
| Hancock | Harris | 1900 | Paris | Number Theory and Algebra |
| Furstenberg | Harry | 1970 | Nice | Geometry & Topology |
| Kesten | Harry | 1970 | Nice | Analysis |
| Kesten | Harry | 2002 | Beijing | Plenary |
| Schmidt | Harry | 1932 | Zurich | Mathematical-technical sciences and astronomy |
| Smith | Hart F. | 1998 | Berlin | Analysis |
| Murakami | Haruo | 1990 | Kyoto | History, Teaching & Nature of Mathmatics |
| Friedman | Harvey | 1974 | Vancouver | Mathematical Logic and the Foundations of Mathematics |
| Oh | Hee | 2010 | Hyderabad | Lie Theory and Generalisations |
| Bauer | Heinz | 1974 | Vancouver | Plenary |
| Hopf | Heinz | 1932 | Zurich | Geometry |
| Kreiss | Heinz-Otto | 1974 | Vancouver | Plenary |
| Hironaka | Heisuke | 1970 | Nice | Analysis/Prize winner |
| Nussenzveig Lopes | Helena | 2018 | Rio de Janeiro | Partial Differential Equations |
| Frankowska | Hélène | 2010 | Hyderabad | Control Theory & Optimization |
| von Koch | Helge | 1900 | Paris | Number Theory and Algebra |
| Hofer | Helmut | 1990 | Kyoto | Geometry |
| Röhrl | Helmut | 1970 | Nice | Geometry & Topology |
| Hofer | Helmut H. | 1998 | Berlin | Plenary |
| Andersen | Henning Hahr | 1994 | Zurich | Lie Groups |