title: John Duffy
text: # John Duffy
  
  John Duffy may refer to:
  
  ## Sportspeople
  
  * John Duffy (footballer, born 1886) (1886–?), English football centre half for Bradford City
  * John Duffy (footballer, born 1922) (1922–1996), Scottish football right back for Clyde and Norwich
  * John Duffy (footballer, born 1929) (1929–2004), Scottish football wing half for Celtic, Arbroath and Southend
  * John Duffy (footballer, born 1943), Scottish football wing half for Raith, Dunfermline, Darlington and Australian clubs
  * John Duffy (Gaelic footballer), Gaelic football player
  * John Duffy (rugby league) (born 1980), rugby league player
  * John Duffy (soccer) (1905–1984), American soccer player
  
  ## Others
  
  * John Duffy (composer) (1926–2015), American composer
  * John Duffy (economist) (born 1964), American economist
  * John Duffy (mobster) (died 1924), American gang member, member of the North Side Gang
  * John Duffy (writer), Canadian writer and political strategist
  * John Duffy and David Mulcahy (both born 1959), the Railway Rapists, British rapists and murderers
  * John A. Duffy (1884–1944), American bishop
  * John F. Duffy (born 1963), legal academic
  * John Gavan Duffy (1844–1917), Australian politician
  * John J. Duffy, American Medal of Honor recipient
  * John J. Duffy Jr. (1933–2019), American criminal defense attorney
  * John Duffy (medical historian) (1915–1996), author of several medical history books
  