His sister Louise was killed at Rolleston in an August 1993 train accident; in September 2008 he completed a 1,001 km (622 mi) walk promoting rail safety awareness.

Cairns is married to Melanie Croser, an Australian who works for the sports marketing group Octagon in Sydney. It is his third marriage. Cairns lives in Canberra and will start playing for the local club North Canberra Gungahlin Eagles in the 2011/12 season. In his first he scored 141 off 66 balls, including 13 sixes. During this knock his last 90 runs came off 27 balls.

Cairns also played for Northland in the Hawke Cup. He had joined the Indian Cricket League, and was the captain of the Chandigarh Lions till its closure in 2008. He later went on to play for Nottinghamshire in the English Twenty20 cup competition.

Cairns was a destructive batsman who could hit sixes straight down the ground and in his earlier days was an intelligent fast-medium bowler. Since then, persistent injuries have forced him to drop his pace and rely more on his hard-to-read slower ball.

With the bat, Cairns has been the author of some of New Zealand cricket's most memorable innings, including his unbeaten 102 to win the final of the 2000 ICC KnockOut Trophy for New Zealand against India in Kenya, and his 158 from just 172 balls in a Test against South Africa in 2004. Cairns knocked Shane Warne out of Australia's bowling attack during a 2000 test in Wellington when he launched several sixes out of the Basin Reserve and onto the adjacent street. Cairns formerly held the world record for most sixes in Tests (87, since surpassed by Adam Gilchrist), and for a time held the New Zealand record for fastest century in ODIs (75 balls, currently owned by Corey Anderson with 36 balls).

ICC KnockOut Trophy

Cairns was also the part of the victorius New Zealand campaign during the 2000 ICC KnockOut Trophy where they beat India in the final to lift their only title in major ICC global event. He played his part in the final and helped the Kiwis side, by scoring a match winning knock of 102*. Finally New Zealand went onto win the final and registered the highest