Scott Ninnis (born 25 December 1965 in Adelaide, South Australia) is a retired Australian professional basketball player and coach who played most of his career with the Adelaide 36ers in the National Basketball League (NBL).
Ninnis won three NBL championships during his career, 1986 and 1998 with the 36ers and 1992 with the South East Melbourne Magic.
He also represented the Australian team during his career.
He later coached the Adelaide 36ers for two years and was an assistant coach with the club when they won the 1998–99 and 2001–02 NBL championships.