| Last Name | First Name | Year | City Sort ascending | Section/Speaker Type |
|---|---|---|---|---|
| Seifert | Herbert | 1932 | Zurich | Geometry |
| Semmes | Stephen W. | 1994 | Zurich | Real & Complex Analysis |
| Sergescu | P. | 1932 | Zurich | Algebra and Number Theory |
| Severi | F. | 1932 | Zurich | Plenary |
| Severi | Francesco | 1932 | Zurich | Geometry |
| Seymour | Paul | 1994 | Zurich | Plenary |
| Shaneson | Julius L. | 1994 | Zurich | Topology |
| Shatah | Jalal | 1994 | Zurich | Part. Diff. Equations |
| Shishikura | Mitsuhiro | 1994 | Zurich | Real & Complex Analysis |
| Sierpinski | Waclaw | 1932 | Zurich | Plenary |
| Slade | Gordon | 1994 | Zurich | Mathematical Physics |
| Smith | David Eugene | 1932 | Zurich | The International Commission on the Teaching of Mathematics |
| Smith | J. J. | 1932 | Zurich | Analysis |
| Snyder | V. | 1932 | Zurich | Geometry |
| Soergel | Wolfgang | 1994 | Zurich | Lie Groups |
| Sogge | Christopher D. | 1994 | Zurich | Real & Complex Analysis |
| Sontag | Eduardo D. | 1994 | Zurich | Applications of Mathematics in the Sciences |
| Souganidis | Panagiotis E. | 1994 | Zurich | Part. Diff. Equations |
| Speiser | Andreas | 1932 | Zurich | Analysis |
| Spencer | Joel | 1994 | Zurich | Combinatorics |
| Spruck | Joel | 1994 | Zurich | Part. Diff. Equations |
| Stenzel | J. | 1932 | Zurich | Plenary |
| Stéphanos | C. | 1897 | Zurich | Arithmetic and Algebra |
| Sternberg | W. | 1932 | Zurich | Probability calculus, insurance mathematics, and statistics |
| Stickelberger | L. | 1897 | Zurich | Arithmetic and Algebra |