Rain Raadik (born 17 May 1989) is an Estonian professional basketball player who plays for Valentino Basket Castellaneta of the Serie C Italian Basketball League.
He is a 2.08 m (6 ft 10 in) tall power forward and center.
He also represented the Estonian national basketball team internationally.
Raadik was a member of the junior Estonian national team that finished 12th in the 2007 FIBA Europe Under-18 Championship.
He averaged 5.1 points and 4.3 rebounds per game.