George Rubens Cox (29 November 1873 – 23 March 1949) was an English first-class cricketer who played for Sussex.

In the later part of his life he became generally known as George Cox senior in order to distinguish him from his son George Cox junior, who was also a successful player for the same county.

However he was chiefly noted for his left-arm bowling, in his first few years at medium-pace but thereafter principally orthodox spin.

In 1926, at the age of 52, he took 17 Warwickshire wickets for 106 runs at Horsham, which remains the best match analysis for the county.

When Cox played his highest innings, 167 not out against Hampshire at Chichester in 1906, he and Butt added 116 for the last wicket.