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 John O'Gaunt railway station Lancaster John O'Gaunt Rowing Club, a rowing club in Lancaster, Lancashire, England John O'Gaunt (1809 ship), an 1809 merchant ship