Campbell Johnstone (born 7 January 1980) is a New Zealand international rugby union player who plays for Biarritz Olympique in the Top 14. In December 2012 he joined Welsh regional team Ospreys until the end of the 2012/13 season, going straight into their 38-man Heineken Cup squad and making his debut the same week against Toulouse. He played for the All Blacks in 2005 in which he played 3 tests and made his debut against Fiji and his latest test was against the British and Irish Lions. His position is prop.