| Last Name | First Name | Year | City | Section/Speaker Type Sort descending |
|---|---|---|---|---|
| Sagastume | A. | 1928 | Bologna | Geometry |
| Salamon | Dietmar | 1994 | Zurich | Geometry |
| Sannia | G. | 1928 | Bologna | Geometry |
| Schaake | G. | 1928 | Bologna | Geometry |
| Scheffers | G. | 1904 | Heidelberg | Geometry |
| Schoen | R. M. | 1983 | Warszawa | Geometry |
| Schönflies | A. | 1904 | Heidelberg | Geometry |
| Schoute | P.H. | 1912 | Cambridge | Geometry |
| Schouten | J. A. | 1928 | Bologna | Geometry |
| Segre | B. | 1928 | Bologna | Geometry |
| Seifert | Herbert | 1932 | Zurich | Geometry |
| Servais | C. | 1924 | Toronto | Geometry |
| Sesum | Natasa | 2014 | Seoul | Geometry |
| Severi | F. | 1908 | Rome | Geometry |
| Severi | F. | 1928 | Bologna | Geometry |
| Severi | Francesco | 1932 | Zurich | Geometry |
| Shiohama | K. | 1978 | Helsinki | Geometry |
| Shustin | Eugenii I. | 1990 | Kyoto | Geometry |
| Simon | L. | 1983 | Warszawa | Geometry |
| Sinzov | D. | 1912 | Cambridge | Geometry |
| Sisam | C. H. | 1928 | Bologna | Geometry |
| Snyder | V. | 1928 | Bologna | Geometry |
| Snyder | V. | 1932 | Zurich | Geometry |
| Sobotka | J. | 1920 | Strasbourg | Geometry |
| Sommerville | D.M.Y. | 1912 | Cambridge | Geometry |