Douglas Mountjoy [needs IPA] (8 June 1942 – 14 February 2021) was a Welsh snooker player from Tir-y-Berth, Gelligaer, Wales.

He was a member of the professional snooker circuit from the late 1970s and throughout the 1980s, and remained within the top 16 of the world rankings for 11 consecutive years.

[3] He was brought up just outside Ebbw Vale and worked for some years as a coal miner, playing snooker in his spare time.

[4][5] At the 1977 World Championship a couple of months later, he defeated Higgins again in the first round but lost to Dennis Taylor in the quarter-final 11–13.

[6] He won the title at the 1978 UK Championship, however, beating David Taylor 15–9, and he defeated Ray Reardon in the same season to win the Irish Masters 6–5.

[8] He won another Welsh title in 1987 but otherwise struggled to regain his previous form, including a 1–9 defeat to Steve Longworth in the first round of the 1986 UK Championship.

[13] In January 1989 he won the Classic, beating fellow Welshman Wayne Jones in the final, to win consecutive ranking titles.

[3] That year, at the age of 50, he defeated Alain Robidoux 10–6 in the first round of the World Championship, only weeks before an operation to remove his left lung.

[18][19][20] In a joint statement, World Snooker chairman Barry Hearn and World Professional Billiards and Snooker Association chairman Jason Ferguson said: "Doug was first and foremost a lovely man, who had great friendships with many players on the tour throughout the 1970s and onwards.