Ian Harrison may refer to:
- Ian Harrison (1919–2008), officer in the Royal Marines
- Ian Harrison (wrestler), wrestler in the X Wrestling Federation
- Ian Harrison (judge), judge on the Supreme Court of New South Wales (2007–present)
- Ian Harrison (musician), musician with the early music group Oni Wytars
- Ian Harrison, D1 Grand Prix racedriver
- Ian Harrison, English table tennis international
- Ian Harrison (sailor) (1937–2016), Paralympic Gold Medalist sailor
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