Mu Sigma Phi may refer to:

• Clariosophic Society, also known as Mu Sigma Phi
• Mu Sigma Phi (medical fraternity) in the Philippines
• Mu Sigma Phi (sorority) in the Philippines

• Minusinskiy
• Minusinskiy District
• Minusinskiy Raion
• Minusinsky District, Krasnoyarsk Krai
• Minusinsky Raion
• Minusio
• Minusio, Switzerland
• Minusio TI
• Minusio (Ticino)
• Minus R
• Minus (record label)
• Minus Records
• Minus RW
• Minus Story
• MINUSTAH
• Minus The Bear
• Minus V
• MINUS V (instrumental collection)
• Minus (webcomic)
• Minus World
• Minus world
• Minus zero
• Minute (angle)
• Minute bog beetle
• Minute brown scavenger beetle