Participants
| Angela Saini | United Kingdom |
| Jehan Salem Abdallah Alghneimin | Jordan |
| Michael Saliba | Germany |
| Ilga Salīte | Latvia |
| Jorge Sanchez Navas | Spain |
| Judit Sándor | Hungary |
| Edmond Sanganyado | Zimbabwe |
| Ana Raquel Santa Maria | Hungary |
| Ajeng Sari | Indonesia |
| Balázs Sarkadi | Hungary |
| Aigerim Satubaldina | Kazakhstan |
| Ashleigh Saunders | United Kingdom |
| Phillip Saxon | United Kingdom |
| Zsuzsa Schaff | Hungary |
| Thomas Schinko | Austria |
| Flavia Schlegel | Switzerland |
| Gitta Schlosser | Hungary |
| Herwig Schopper | Germany |
| Marion Schulte zu Berge | Germany |
| Yves Sciama | France |
| Nicolas Seidler | Switzerland |
| Muzaffer Şeker | Turkey |
| Viktoriia Semenova | Russian Federation |
| Adél Sepsi | Hungary |
| Anna Seres | Hungary |
| Mohammed Fekhreddine Seridi | Algeria |
| Joshua Setipa | Lesotho |