Diana Yankey (in some sources "Dinah"; born 2 February 1967) is a retired Ghanaian athlete who specialized in the 100 metres hurdles. She represented her country at the 1987 World Championships in Athletics and the 1988 Summer Olympics. She was twice champion at the African Championships in Athletics and took silver medals at the 1987 All-Africa Games and the 1988 African Championships in Athletics.