John Campbell Peacock (2 November 1879 â 9 September 1939) was a New Zealand tennis player.
A solicitor by profession, Peacock was a seven time singles finalist at the New Zealand Championships, winning titles in 1901 and 1910. He later contributed to New Zealand tennis in an administrative capacity and participated in a 1924 Davis Cup tie against Czechoslovakia while serving as vice president of the New Zealand Lawn Tennis Association.
Peacock died in a car accident in 1939 when his vehicle collided with a steam shovel that was being towed.