Dominik Olejniczak (born 1 July 1996) is a Polish professional basketball player for Saint-Quentin of the LNB Pro A.

He played college basketball for the Drake Bulldogs, the Ole Miss Rebels and the Florida State Seminoles.

[6] During the 2022-2023 season, he was named to the "All-Star-Game LNB" for the first time in his career, with BCM Gravelines Dunkerque.

[7] Olejniczak played for Poland at the under-18 and under-20 levels before making his senior international debut for the team in 2016.

Olejniczak helped Poland finish in eighth place at the 2019 FIBA Basketball World Cup.