Kacper Trelowski (born 19 August 2003) is a Polish professional footballer who plays as a goalkeeper for Ekstraklasa club Raków Częstochowa.

Trelowski made his senior club debut at Sokół Ostróda in 2021 while being loaned out from Raków.

He made his European debut during a UEFA Europa Conference League qualifying math against Spartak Trnava on 4 August 2022.

In October 2024, Trelowski got his first senior call up for Poland for two matches against Portugal and Croatia in the Nations League, replacing the injured Bartłomiej Drągowski.

This biographical article related to a Polish association football goalkeeper is a stub.