John Crowley may refer to:John Crowley (author), American author
John Crowley (baseball) (1862–1896), American Major League catcher
John Crowley (businessman), American biotechnology executive
John Crowley (bishop), former bishop of Middlesbrough
John Crowley (director), Irish theatre and film director
John Crowley (politician) (1870–1934), Irish Sinn Féin politician
John Crowley (1659–1728), British politician
John Francis Crowley (1891–1942), Irish revolutionary and hunger striker
John Powers Crowley (1936–1989), U.S. federal judge
Johnny Crowley, Irish hurler
Johnny Crowley, Gaelic footballer with Kerry GAA
John J. Crowley (1891–1940), American Catholic priest
John W. Crowley (1899-1974), American pilot and NASA director