Gregory Campbell may refer to:
- Gregory Campbell (politician) (born 1953), Ireland
- Gregory Campbell (ice hockey) (born 1983), Canadian
- Greg Campbell (born 1964), Australian cricketer
- Greg Campbell (journalist) (fl. Gregory Lloyd Campbell (born February 15, 1953 in Derry Northern Ireland) is a unionist politician and the Democratic Unionist Party Gregory Campbell (born on December 17 1983) is a Canadian Ice hockey left winger who currently plays for the Florida Panthers of the Gregory Dale Campbell (born 10 March 1964 Launceston Tasmania) is a former Australian Cricketer who played in 4 Tests and 12 ODIs 2000s), Australian -- rugby
- Greg Campbell (rugby) (fl. 2000s), Scottish player
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