Karun Kaladharan Nair (born 6 December 1991) is an Indian international cricketer who plays for Karnataka in domestic cricket. He is a right-handed batsman and occasional off break bowler. Having previously played for Royal Challengers Bangalore, Rajasthan Royals and Delhi Daredevils in the Indian Premier League, he was signed up by the Kings XI Punjab in 2018.
He made his Test cricket debut in 2016 against England. He became the third player in international cricket to convert his maiden century into a triple century, by scoring an unbeaten 303 against England in his third Test.
Nair made his first-class debut in the 2013–14 season in which Karnataka won the Ranji Trophy. He scored three consecutive centuries in their final league game and the first-two knockout matches. Karnataka won the title again in 2014–15, with Nair scoring 709 runs in their ten matches, including a knock of 328 in the final against Tamil Nadu to help Karnataka register an innings victory. He became only the second player from Karnataka to score a triple century and the first batsman to score a triple century in a Ranji final since 1946–47. It was the highest total by a batsman in the final of the Ranji Trophy.