Gary Mawson (born May 17, 1963 in Etobicoke, Ontario, Canada) is a former Canadian-born American darts player, who currently resides in Pompano Beach, Florida, United States. Mawson played darts for the USA from 2004 onwards, having previously played darts for Canada up to 2001. Mawson used the nickname The Mauler for his matches. Mawson's parents were born in Britain, and he also lived in Bolton, England for 4 years between the ages of 3–7 before moving back to Canada. As a result, Mawson holds dual Canadian and British citizenship. Despite living in the United States for many years, Mawson is yet to become a US citizen.

Mawson's biggest career achievement in darts was in reaching the final of the 2008 UK Open in Bolton, after upsetting the odds and defeating the 2-time defending UK Open champion, Raymond van Barneveld, 10–8 in the semi finals. Van Barneveld had never previously lost at the UK Open and had won 16 matches in a row at the event. Mawson lost in the final to James Wade.

Gary Mawson first tried to play the darts circuit in Britain in 1989, but that was the year when darts went through a big slump, and he had to return home to Canada. Mawson first entered the Canadian National Darts Championship in 1992 and reached the last 16. When the World Darts Council (now the Professional Darts Corporation - PDC) was first formed in 1994, players from the North American circuit were added to the 14 who broke away from the British Darts Organisation to bring the number of players up to the total required for a tournament. Mawson made his televised debut in darts at the 1995 World Matchplay, where he took an early lead against Phil Taylor, before Taylor came back to win 8–5.

Representing Canada, Mawson appeared at each PDC World Matchplay between 1995 and 2000, at the PDC World Grand Prix in 1998 and 1999, and also at the PDC World Darts Championship between 1996 and 2000. His best performance in these years was to reach the quarter-finals of the 1998 World Grand Prix which remained his best performance in a PDC event until he made it to the quarter finals of the 2007 Las Vegas Desert Classic, by then representing the USA.

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