The 2021 Tour Championship (officially the 2021 Cazoo Tour Championship) was a professional snooker tournament that took place from 22 to 28 March 2021 at the Celtic Manor Resort in Newport, Wales. Organised by the World Snooker Tour, it was the third edition of the Tour Championship and the third and final event of the third season of the Cazoo Cup. It was the 14th and penultimate ranking event of the 2020–21 snooker season, following the conclusion of the WST Pro Series and preceding the World Championship.
The draw for the Tour Championship comprised the top eight players based on the single year ranking list. The event was contested as a single-elimination tournament, each match being played over two sessions. The winner of the tournament received £150,000 out of a total prize fund of £380,000. The event was sponsored by car retailer Cazoo. The defending champion was Stephen Maguire, but as a result of reduced earnings during the season he was unable to qualify and defend the title. In a repeat of the 2019 final Australian Neil Robertson played Englishman Ronnie O'Sullivan. Robertson won the event defeating O'Sullivan 10–4 in the final. There were 26 century breaks made during the event, Barry Hawkins making the highest break, a 138.