| Pos | Name | Country | stamps | Since |
|---|---|---|---|---|
| 835 | Sard Jesus | España | 1 | 29/12/2011 |
| 35 | Sebastian Carlos | Argentina | 3138 | 22/09/2009 |
| 247 | Secades Pilar | España | 101 | 28/11/2011 |
| 829 | Sed Michel | Cuba | 1 | 02/06/2018 |
| 916 | Seifert Peter | Suecia | 1 | 16/11/2019 |
| 863 | Sena Catia | Brasil | 1 | 04/05/2014 |
| 92 | Senestrari Patiño Ernesto | España | 1076 | 15/11/2012 |
| 339 | Serra Antonio | España | 40 | 11/11/2009 |
| 212 | Serrano Jose | España | 130 | 24/09/2010 |
| 51 | Serrano Jose | España | 2951 | 08/09/2011 |
| 735 | Servat Luis | Perú | 1 | 17/03/2011 |
| 496 | Seufferheld Omar | Argentina | 11 | 20/02/2013 |
| 133 | Sierra Fran | España | 178 | 26/09/2008 |
| 14 | Sierra Licona Herberth | Honduras | 7242 | 17/06/2009 |
| 625 | Sierra Gomez Soraya | España | 8 | 02/03/2014 |
| 919 | Sifuentes Erick | México | 1 | 14/05/2012 |
| 979 | Siguenza Felipe | España | 1 | 13/10/2013 |
| 139 | Silva Juan Carlos | España | 420 | 12/12/2008 |
| 348 | Silva Gustavo | Argentina | 19 | 29/09/2010 |
| 952 | Silva Lorena | Chile | 1 | 08/09/2011 |