John Gaffney (disambiguation)
# John Gaffney (disambiguation)

John Gaffney can refer to:

* John Gaffney (1855–1913), American umpire and baseball manager
* John Gaffney (politician) (active 1938), Irish politician
* John F. Gaffney (1934–1995), American politician
* John Gaffney (actor) (active since 1994), Scottish actor
