John Duffy
# 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
