Alicja Peczak (born 13 January 1970 in Bydgoszcz, Kuyavian-Pomeranian) is a retired breaststroke and medley swimmer from Poland, who has competed in two consecutive Summer Olympics for her native country: in 1992 and 1996.
A member of Astoria Bydgoszcz and AZS-AWF Gdansk, she is best known for winning several medals at the FINA Short Course World Championships.
Peczak was banned for 18 months because of doping use.