Łukasz Kaczmarek (born 29 June 1994) is a Polish professional volleyball player. He is a member of the Poland national team, a participant in the Olympic Games Tokyo 2020, silver medallist at the 2022 World Championship, and a two–time Champions League winner (2021, 2022). At the professional club level, he plays for ZAKSA Kędzierzyn-Koźle.