John Gaffney may refer to:
- John Gaffney (baseball) (1855–1913), American baseball umpire and manager
- John Gaffney (politician) (active 1938), Irish politician
- John F. Gaffney (1934–1995), American politician
- John Gaffney (actor) (active since 1994), Scottish actor
This disambiguation page lists articles about people with the same name.
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