Horst Skoff (22 August 1968 – 7 June 2008) was a professional tennis player from Austria, who won four tournaments at the top-level.
Skoff was born in Klagenfurt, Austria, and turned professional in 1985. He won his first top-level singles title in 1988 at Athens. Over the course of his career he won four top-level singles titles and two tour doubles titles. His career-high rankings were World Number 18 in singles and World Number 70 in doubles. His career prize money totalled US$1,651,858.
Skoff played on Austria's Davis Cup team for nine years, compiling a 22–17 win-loss record. He helped the team reach the World Group semi-finals in 1990. Memorable Davis Cup rubbers which Skoff was involved in include a five-set win over Mats Wilander in the 1989 quarterfinal; and a five-set loss to Michael Chang in the 1990 semifinal.
Despite Skoff's relative success during his career of winning four top-level tournaments, his memorable Davis Cup moments, and reaching a career high world ranking of 18 in singles competition, he never managed to progress beyond the second round at any Grand Slam event.