| • 06/05/2021 Men's Under 16s: Squad selected for training camp in Warszawa (16 May - 20 May) |
| # | pos | name | club |
| G | Igor Bartnik |  Motor Lublin |
|
| G | Patryk Letkiewicz | UKS SMS ŁódĽ |
|
| G | Jan Sobczuk | Legia Warszawa |
|
| D | Krystian Derkacz | Polonia Warszawa |
|
| D | Mateusz Dobosz | Ursus Warszawa |
|
| D | Antoni Grzelczak | Polonia Warszawa |
|
| D | Dominik Janeczek | Lech Poznań |
|
| D | Bartosz Krasuski | Legia Warszawa |
|
| D | Miłosz Kurzydłowski | Lechia Gdańsk |
|
| D | Filip Luberecki | Escola Varsovia Warszawa |
|
| D |  Hubert Ogórek |
Górnik Zabrze |
|
| D | Jan Ziółkowski | Polonia Warszawa |
|
| M | Bartosz Bernatowicz | Jagiellonia Białystok |
|
| M | Jan Bonikowski | Zagłębie Lubin |
|
| M | Mateusz Cichocki | Victoria Sulejówek |
|
| M | Adam Chojecki | Mazur Karczew |
|
| M | Bartosz Falbierski | Warta Poznań |
|
| M | Oliwier Kwiatkowski | Rozwój Katowice |
|
| M | Mikołaj Nasalski | Motor Lublin |
|
| M | Franciszek Stachoń |
Wisła Kraków |
|
| M | Dariusz Stalmach | Górnik Zabrze |
|
| F | Dawid Gruszecki | ¦l±sk Wrocław |
|
| F | Maksymilian Stangret | Legia Warszawa |
|
| F | Marcel Szymański | Radomiak Radom |
|
| F | Tomasz Walczak | Escola Varsovia Warszawa |
|
| Krystian Bojańczyk | STF Champion Warszawa |
| Squad update: |
| • 18/05/2021 Men's Under 16s: Hubert Ogórek has been added to the squad for training camp in Warszawa (16 May - 20 May) |
| • 11/05/2021 Men's Under 16s: Franciszek Stachoń has been added to the squad for training camp in Warszawa (16 May - 20 May) |