| Link | Location | |
|---|---|---|
 | Joanna Kornacka | Łódź, Poland |
| Todd Kornahrens | Haddon Heights, New Jersey, United States |
| Stefan Körner | Munich, Germany |
| Eugene Korobka | Chicago, Illinois, United States |
| Roman Korolenko | Москва (Online), Russia |
| Vitaliy Korolev | Moscow, Russia |
| Sylwia Korpok | Warszawa, Poland |
| Andrei Korsak | Moscow, Russia |
| Asako Kosaka | Tokyo, Japan |
| Oleksandr Kosenkov | Munich, Germany |
| Satoshi Koshihara | Tokyo, Japan |
 | Justyna Kosińska | Warsaw, Poland |
 | Aleksander Kóska | Poznań, Poland |
| Eylül Kosok | Dortmund, Germany |
| Agnieszka Kosowska | Warszawa, Poland |
