John J Cox (22 May 1962) is a British chess player who holds the title of International Master which he earned in 2005.
His peak Elo rating of 2423 was achieved in January 2006.
Cox was among the strong juniors in the 1970s and 1980s and finished tied for first in a British U18 championship.
The need to earn a living made Cox leave the chess scene for several years.