The term Mastermind can refer to various different concepts:

• Master Mind Coordination of knowledge and effort, in a spirit of harmony, between two or more people, for the attainment of a definite purpose.
• Mastermind as an act of prescribing proposed methods of moving towards or achieving one or more objectives or goals, see "plan".
• Mastermind - the brains behind an enterprise or scheme.
• Mastermind, the UK quiz show. See Mastermind (television)
• Mastermind, a puzzle board game. See Mastermind (board game)
• Mastermind, a name used often in the Marvel Comics Universe. See Mastermind (comics)
• Master Mind, a superhero in the Buster comic. See Master Mind
• Mastermind is the 2nd studio album by the British dance diva Tina Cousins. See Mastermind (album)
• Mastermind, is a progressive metal band. See Mastermind (band)
• Mastermind, a villain in the animated series, Loonatics Unleashed
• Mastermind is a name for the Myers-Briggs Type Indicator personality type INTJ
• Masterminds are a character archetype in the computer game City of Villains.