John Knox (4 October 1904 – 10 April 1966) was an Argentine first-class cricketer.
Knox, of Scottish-descent, was born at Buenos Aires in October 1904.
He made his debut in first-class cricket for Argentina against the touring Marylebone Cricket Club at Buenos Aires in December 1926, with Knox playing a further four first-class matches against the same opposition the following month.
[1] He played two first-class matches for Argentina against a touring Sir J. Cahn's XI in 1930.
[1] His final first-class appearance came for Argentina against Sir T. E. W. Brinckman's XI in 1938.