Denis Gargaud Chanut (born 22 July 1987) is a French slalom canoeist who has competed at the international level in C1 since 2004.

He won a gold medal in the C1 event at the 2016 Summer Olympics in Rio de Janeiro.

Denis's aunt and uncle, Pierre and Cathy Chassigneux, were French champions in the mixed C2 category and run a canoe-kayak club on the Loire river in Orléans; Denis took up canoeing there aged 12.

He later excelled internationally, but failed to qualify for the 2008 and 2012 Olympics due to a strong competition with Tony Estanguet, and considered retiring.

[1] Denis is the founder and head of the Duo Tonic and Mulebar company, which produces bars drinks and energy gels for athletes.