John Crowley (disambiguation)
John Crowley may refer to:
- John Crowley (born 1942), American author and fantasist
- John Crowley (baseball) (1862–1896), American Major League catcher
- John Crowley (biotech executive), American biotechnology executive and subject of the movie Extraordinary Measures
- John Crowley (director) (born 1969), Irish theatre and film director
- John Crowley (Irish politician) (died 1934), Irish Sinn Féin politician
- John Crowley (ironmonger), son and successor of Sir Ambrose Crowley
- John Patrick Crowley (born 1941), former bishop of Middlesbrough
- John Powers Crowley (born 1936), U.S. federal judge
- Johnny Crowley (born 1956), hurler
- Johnny Crowley (Kerry GAA), Gaelic footballer with Kerry GAA