John Duggan may refer to:
- John Duggan (rugby, born 1929) (1929–2022), English former rugby union and rugby league footballer
- John Duggan (rugby union, born 1948), Irish former Leicester Tigers winger
- John Duggan (bishop) (1918–2000), Bishop of Tuam, Killala, and Achonry, 1970–1985
- Jack Duggan (politician) (1910–1993), Australian politician for Electoral district of Toowoomba West
- Johnny Duggan (jockey), on racehorse Gold and Black
- John Duggan, main character in the TV series Duggan
- John Duggan, character in the TV series The Thick of It
- Jack Duggan (ice hockey) (1897–1977), ice hockey player
- Jack Duggan (politician) (1910–1993), member of the Queensland Legislative Assembly
- John Duggan (political scientist) of the Duggan–Schwartz theorem
See also
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This disambiguation page lists articles about people with the same name.
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