Mathieu Chantelois (born July 4, 1973) is a Canadian television personality and magazine editor.
A graduate of Carleton University's journalism program, Chantelois was one of the original housemates on the Canadian reality television series U8TV: The Lofters. The first season's only openly gay resident, Chantelois created the series So Gay TV for PrideVision.
Following the end of his term on The Lofters, Chantelois continued hosting programming for PrideVision and its successor channel OUTtv, including Read Out!, featuring authors from the LGBT community, and the reality series COVERguy. Chantelois has also worked as a cultural reporter for TFO's Panorama. He is also an editor of the movie magazine Famous Quebec.
On February 14, 2005, he was a keynote speaker at the grand opening celebration for the Pride Library at the University of Western Ontario.
In 2006, Chantelois was named chair of the board at The 519 Church St. Community Centre in Toronto. He stepped down from the position in 2009, but is still involved with the organization in other capacities.
Chantelois married Marcelo Gomez in 2003 in Toronto. They were one of the first gay couples to be married in Canada following the legalization of same-sex marriage in Ontario, so soon after the court decision that the city of Toronto had not yet produced gender-neutral marriage license forms.
In 2015, he was named the new executive director of Toronto Pride. He resigned the position on August 11, 2016, approximately six weeks after facing criticism over his handling of the Black Lives Matter demand that Toronto Police officers be barred from participating in Pride events in uniform.