Jay Dean Haas (born December 2, 1953) is an American professional golfer.
Haas was born in St. Louis, Missouri, and grew up in Belleville, Illinois. He attended Wake Forest University and was a member of the NCAA Championship team of the middle 1970s with Curtis Strange and Bob Byman that Golf World has called "the greatest college team of all time". He won the individual championship in 1975. He turned professional in 1976.
Haas has had a solid career on the PGA Tour, winning nine times between 1978 and 1993. He had a resurgence in 2003, when he finished in the top 30 on the money list for the first time since 1995 and made the United States Presidents Cup team. The following year he was one of Hal Sutton's two captain's picks for the Ryder Cup, and made his third appearance in that event.