Guylaine Dumont (born October 9, 1967 in Saint-Étienne-de-Lauzon, Quebec) is a Canadian female beach volleyball player.
Together with partner Annie Martin, Guylaine Dumont recorded the best ever Olympic result for Canadian women in beach volleyball with a fifth-place finish at the 2004 Olympic Games in Athens, losing to the Americans Misty May and Kerry Walsh in the quarter-final.
In 2002, Dumont returned to the sport full-time and began competing alongside Martin in the beach volleyball discipline.
She represented her country at two junior World Championship 1) in Salt Lake city in 2018 and 2) in Pine , Italy in 2019.
Dumont ran for the New Democratic Party in the riding of Lévis—Lotbinière in the 2021 Canadian federal election.