Gary James Grant Anderson (born 22 December 1970) is a Scottish professional darts player who competes in Professional Darts Corporation (PDC) events, where he is currently ranked world number thirteen; he reached a peak ranking of world number two from 2015 to 2017. Anderson is a former British Darts Organisation (BDO) and World Darts Federation (WDF) world number one. Nicknamed "the Flying Scotsman", after the famous steam train, he is a two-time, back-to-back PDC World Champion, having won the title in 2015 and 2016, and is widely regarded as one of the greatest players in the history of the sport.

Before switching to the PDC following the 2009 BDO World Championship, Anderson won four BDO major titles: the International Darts League, World Trophy and Finder Masters in 2007 as well as the 2008 Finder Masters.

He defeated Phil Taylor 7–6 in the 2015 PDC World Championship final and Adrian Lewis 7–5 the following year, while he was also a finalist in 2011, 2017 and 2021. He has won six other PDC major singles titles: the Premier League in 2011 and 2015, the Players Championship Finals in 2014 and the UK Open, World Matchplay, and Champions League in 2018. He has also won the 2019 PDC World Cup of Darts, representing Scotland alongside Peter Wright. Anderson has also won 39 PDC Pro Tour events as of May 2025, putting him third on the all-time list behind Michael van Gerwen on 90 and Phil Taylor on 70. He has won an overall total of 55 PDC titles.

Anderson has been renowned for his heavy scoring and for having one of the smoothest throws.

Born in Musselburgh, Anderson began his career playing in British Darts Organisation events and won the second tournament he entered by claiming the 2001 Welsh Open with a defeat of John Walton. The win ensured he qualified for the following year's World Championship for the first time, where he suffered a first round defeat to Sweden's Stefan Nagy, going down 3–0. The following year, in the 2003 BDO World Darts Championship Anderson reached the semi-final stage before bowing out to eventual runner-up Ritchie Davies. Anderson would not win another match at the Lakeside Country Club until 2006, when he beat Gary Robson in the first round before again falling to the eventual finalist this time in Raymond van Barneveld in the second round.

In the following two years, Anderson was knocked out of the World Championship in the first round by Dutch players – in 2007, he lost to Albertino Essers, and in 2008, he was defeated by Fabian Roosenbrand.

Anderson won the first major tournaments of his career by claiming the International Darts League and World Darts Trophy back-to-back in 2007. It was a significant achievement as he succeeded against fields comprising the top players and world champions from both the rival organisations: the Professional Darts Corporation and BDO. In the two events, he had victories against Wayne Mardle, Roland Scholten, Mervyn King, James Wade, Adrian Lewis, Mark Webster, John Part, Peter Manley, Andy Hamilton and Phil Taylor.

Shortly after his WDT title, his success continued by clinching the BDO British Open to add to his 2007 Scottish Open success. Anderson also won the Zuiderduin Masters two years in a row – the first of which was an unranked event, the second was the first championship since the tournament was elevated to the status of ranking major. Anderson finished 2007 as the WDF world number 1, while he later ended 2008 as the WDF world number 2 behind Scott Waites In 2008, Anderson won the German Open, Welsh Open and BDO International Grand Prix titles. He also won the Dutch Pentathlon in 2008, retaining the title in 2009, with a world record score of 502 points.