Grandmaster or Grand Master may refer to:
In positions:
- Grand Master (order), the head of various orders
- Grand Masters of the Knights Templar
- List of Grand Masters of the Knights Hospitaller
- Grand Masters of the Teutonic Knights
- Grand Master (Masonic)
- Grand Master of Education, Science, and Culture, Francisco Macías Nguema (1924–1979), the first president of Equatorial Guinea
In superior skill:
- Grandmaster (chess)
- Grandmaster (martial arts)
- Grand Master of Memory, awarded by the World Memory Sports Council
- Damon Knight Memorial Grand Master Award, awarded by the Science Fiction and Fantasy Writers of America
- MWA Grand Master Award, awarded by the Mystery Writers of America
- Grand Master, a rank in competitive shooting within the USPSA and IPSC
- Grandmaster or Master craftsman, a member of a guild
- World Grand Master (bridge), maintained by the World Bridge Federation
- Grand Master, the highest skill ranking in the Tetris: The Grand Master video game series
In modern culture:
- Grand Master Robo, supervillain in the Indian Raj Comics universe
- Grand Master (Jedi), also known as "Jedi Grand Master", or formally "Grand Master of the Jedi Order" - Order of the Jedi in Star Wars
- Grandmaster (DC Comics), a character in DC Comics
- Grandmaster (Marvel Comics), a character in Marvel Comics
- Grandmaster Flash Joseph Saddler (born 1958), hip-hop musician and disc jockey
- Grandmaster Melle Mel, Melvin Glover (born 1961), hip-hop musician
- Grandmasters (album), an album by DJ Muggs and GZA
- Grandmaster (film), a 2012 Indian film
- Grandmaster Jay John Johnson (born 1963), hip-hop rapper and disc jockey
- Grand Master (custom car), winner of the 2002 Ridler
- The Grandmasters, upcoming Hong Kong film
In technology:
- Grandmaster, the source for the time reference in Precision time protocol