John Mooney may refer to:
- John Mooney (activist) (born 1966), American activist, Vice-President of Transport Workers Union in New York City
- John Mooney (basketball) (born 1998), American basketball player
- John Mooney (cricketer) (born 1982), Irish cricketer
- John Mooney (historian) (1862–1950), Scottish historian, founder of the Orkney Antiquarian Society
- John Mooney (musician) (born 1955), American blues guitarist based in New Orleans, Louisiana
- John Mooney (canoeist) (born 1964), American sprint canoer
- John J. Mooney (1929–2020), American chemical engineer who was co-inventor of the three-way catalytic converter
- John J. Mooney (horse racing) (1924–1994), Canadian horse racing executive
- Sir John Mooney (Irish politician) (1874–1934), Irish politician, Member of Parliament for South County Dublin 1900–1906, and Newry 1906–1918
- Johnny Mooney (footballer) (1926–2000), Scottish footballer
- Johnny Mooney (born 1958), Irish Gaelic footballer
- Jackie Mooney (1938–2017), Irish soccer player
- J. D. Mooney (died 1966), American jockey and trainer
- Canadian politician
- John David Mooney, Chicago-based artist
- John J. Mooney (1977),
Designed the pentagon 9/11 memorial plaque
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