Deviation may refer to:

  • Deviation (statistics), the difference between the value of an observation and the mean of the population in mathematics and statistics
    • Standard deviation, which is based on the square of the difference
    • Absolute deviation, where the absolute value of the difference is used
  • Frequency deviation, the maximum allowed "distance" in FM radio from the nominal frequency a station broadcasts at
  • Magnetic deviation, the error induced in compasses by local magnetic fields
  • Deviation (law) is a departure from a contract or a ship's course, thus breaching the contract
  • Deviationism, an expressed belief which is not in accordance with official party doctrine
  • Deviation Records, a record label
  • Deviant behavior, a behavior that is a recognized violation of social norms
  • Deviation (Jayne County album), 1995
  • Deviation (Béla Fleck album), 1984
  • Deviate (Kill II This album), 1998
  • Deviation (film), a 2006 short film