Ian Harrison may refer to:
- Ian Harrison (Royal Marines officer), officer in the Royal Marines
- Ian Harrison (wrestler) (born 1969), 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 (racing driver), D1 Grand Prix racedriver
- Ian Harrison (table tennis), English table tennis international
- Ian Harrison (sailor), Paralympic Gold Medalist sailor