| • 25/05/2021 Men's Under 16s: Squad selected for friendlies against Slovenia |
| # | pos | name | club |
| G | Marcel Mendez-Dudziński |  Pogoń Szczecin |
|
| G | Antoni Mikułko | Lechia Gdańsk |
|
| D | Philip Buczkowski |  FC Schalke 04 |
|
| D | Krystian Derkacz | Polonia Warszawa |
|
| D | Yarek Gasiorowski Hernandis |  València |
|
| D | Tommaso Guercio |  Inter |
|
| D | Dominik Janeczek | Lech Poznań |
|
| D | Bartosz Płocki | UKS SMS ŁódĽ |
|
| D | Patryk Rychlik | FASE Szczecin |
|
| D | Miłosz Skowronek | Jagiellonia Białystok |
|
| D | Bartosz Tomaszewski | Lech Poznań |
|
| M |  Maksymilian Dziuba |
Lech Poznań |
|
| M | Bartosz Falbierski | Warta Poznań |
|
| M | Wiktor Gromek |  Leicester City |
|
| M | Kacper Masiak | Zagłębie Lubin |
|
| M | Mikołaj Nasalski | Motor Lublin |
|
| M | Mateusz Wójcik | Lech Poznań |
|
| M | Dawid Zięba | Lech Poznań |
|
| F | Dawid Gruszecki | ¦l±sk Wrocław |
|
| F | Jakub Jędrasik | UKS SMS ŁódĽ |
|
| F |  Krystian Okoniewski |
Lechia Gdańsk |
|
| F | Oliwier Sławiński | Zagłębie Lubin |
|
| F | Tomasz Walczak |
Escola Varsovia Warszawa |
| Squad update: |
| • 05/06/2021 Men's Under 16s: Krystian Okoniewski has been removed from the squad due to injury |
| • 04/06/2021 Men's Under 16s: Tomasz Walczak has been added to the squad for friendlies against Slovenia |
| • 26/05/2021 Men's Under 16s: Maksymilian Dziuba has been added to the squad for friendlies against Slovenia |