Michael Diamond, better known as Mike D, is a founding member of New York City hip hop group the Beastie Boys. Mike D raps, sings, and plays drums.
- Born: November 20, 1965 (age 53), New York City
- Spouse: Tamra Davis (1993 to present - Marriage)
- Aliases: Alasondro Alegré, Country Mike, Meshach, Michael "Mike D" Diamond, Michael Diamond, Michael L. Diamond, Michael Louis Diamond, Mike 'Mike D' Diamond, Mike D., Mike Diamond, The King of Lunch
- Children: Davis Diamond, Skyler Diamond
- Genre: Hip hop music