Maailmameistrivõistluste kvalifikatsioon 2021

The 2021 World Snooker Championship (officially the 2021 Betfred World Snooker Championship) was a professional snooker tournament that took place from 17 April to 3 May 2021 at the Crucible Theatre in Sheffield, England. It was the 45th consecutive year the World Snooker Championship was held at the Crucible Theatre and the 15th and final ranking event of the 2020–21 snooker season. It was organised by the World Snooker Tour. The event was sponsored by sports betting company Betfred and broadcast by the BBC, Eurosport and Matchroom Sport. It featured a total prize fund of £2,395,000 of which the winner received £500,000.

Qualifying for the tournament took place between 5 and 14 April 2021 at the English Institute of Sport in Sheffield. There were 128 participants in the qualifying rounds, consisting of a mix of professional and invited amateur players. The main stage of the tournament featured 32 players: the top 16 players from the snooker world rankings and an additional 16 players from the qualifying rounds. Ronnie O'Sullivan was the defending champion, having won his sixth world title at the previous year's event, where he defeated Kyren Wilson 18–8 in the final. O'Sullivan lost in the second round to Anthony McGill 12–13. Mark Selby defeated Shaun Murphy 18–15 in the final to win his fourth world title and the 20th ranking title of his career. There were a record 108 century breaks made at the Crucible, with an additional 106 made in qualifying rounds. The tournament's highest break was 144 by Murphy in the second round.