John O'Gaunt may refer to:
- John of Gaunt (1340–1399), English nobleman
- John O'Gaunt (automobile), a pre-1905 English automobile
- John O'Gaunt School, a mixed comprehensive school in Hungerford, Berkshire, England
- John O'Gaunt, Leicestershire, a locality in England
- Lancaster John O' Gaunt Rowing Club, a rowing club in Lancaster, Lancashire, England
- John O'Gaunt (1809 ship), an 1809 merchant ship
This disambiguation page lists articles associated with the title John O'Gaunt.
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