Greylock

Greylock may refer to:


 * Gray Lock or Greylock, a Western Abenaki Missisquoi chief
 * Greylock Capital Management, an asset management firm
 * Greylock Partners, a venture capital firm
 * Camp Greylock, a summer camp in Becket, Massachusetts
 * Mount Greylock, the highest natural point in Massachusetts
 * Mount Greylock State Reservation, a forest preserve in Massachusetts
 * Greylock Mountain, within the Sawtooth Range, near Atlanta, Idaho
 * Greylock, the main character in the comic Grey Legacy
 * Greylock, a fictional New Hampshire town in the TV series The Republic of Sarah
 * Jack Greylock, a main character in the film Between Friends and the eponymous novel it was based on