The 2005 Masters was the 2005 edition of the non-ranking Masters professional snooker tournament. It was held from 13 to 20 February 2005 at the Wembley Conference Centre, London. The tournament was the 31st staging of the competition and was the sixth of nine World Professional Billiards and Snooker Association (WPBSA) main tour events in the 2004/2005 season. The tournament was broadcast in the United Kingdom on the BBC and by Eurosport in Europe.

The Masters is a professional invitational snooker tournament. Held every year since 1975, it is the second-longest-running professional snooker tournament after the World Championship. It is one of the three Triple Crown events, along with the UK Championship and the World Championship. Although not a ranking event, it is regarded as one of the most prestigious tournaments on the World Snooker Tour. The reigning champion is Ronnie O'Sullivan, who won his eighth Masters title in 2024, defeating Ali Carter 10‍–‍7.