Mariusz Krzysztof Wieczorek (born 14 March 1976 in Opoczno)[1] is a Polish slalom canoeist who competed at the international level from 1992 to 2005.

He won a gold medal in the C1 team event at the 1999 ICF Canoe Slalom World Championships in La Seu d'Urgell.

He also won an individual gold and a team bronze at the 2002 European Championships in Bratislava.

[2] Wieczorek competed in two Summer Olympics, earning his best finish of 11th in the C1 event in Atlanta in 1996.

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