Alicja Pęczak (born 13 January 1970 in Bydgoszcz, Kuyavian-Pomeranian) is a retired breaststroke and medley swimmer from Poland, who competed in two consecutive Summer Olympics for her native country: in 1992 and 1996.

A member of Astoria Bydgoszcz and AZS-AWF Gdańsk, she is best known for winning several medals at the FINA Short Course World Championships.

Pęczak was banned for 18 months because of doping use.

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