| nickname(s) |  Kruczek |
| position(s) | Defender (Central) |
| preferred foot | Left |
| height [cm] • weight [kg] | 185 • 78 |
| date of birth [dd/mm/yyyy] | 13/03/2000 |
| place of birth |  Drezdenko |
| nationality(ies) | Polish |
| • 24/05/2022 Men's Under 21s: Kamil Kruk has replaced injured Krzysztof Kubica in the squad for 2023 UEFA Under 21 Championship qualifiers against San Marino and Germany |
| • 29/10/2021 Men's Under 21s: Players from Polish clubs have been added to the squad for 2023 UEFA Under 21 Championship qualifiers against Germany and Latvia |
| • 24/09/2021 Men's Under 21s: Players from Polish clubs have been added to the squad for 2023 UEFA Under 21 Championship qualifiers against Hungary and San Marino |
| • 30/08/2021 Men's Under 21s: Kamil Kruk, Filip Majchrowicz, Patryk Plewka and Mateusz Żukowski have been added to the squad for 2023 UEFA Under 21 Championship qualifiers against Latvia and Israel |
| • 07/05/2021 Men's Under 21s: Squad selected for training camp in Warka (17 May - 20 May) |
| • 17/03/2021 Men's Under 21s: Squad selected for friendlies against Saudi Arabia and Austria |