Stuart Appleby (born 1 May 1971) is an Australian professional golfer.
Appleby was born in Cohuna in rural northern Victoria. He practiced by hitting balls from paddock to paddock. He turned professional in 1992 and began his career on the PGA Tour of Australasia. In 1995 he won twice on the Nike Tour (now known as the Nationwide Tour), the second tier men's tour on in the U.S., and qualified to compete on the PGA Tour the following year by finishing the season fifth on the money list. He has won nine times on the PGA Tour. He was a member of the International Team in the Presidents Cup four times, and featured in the top ten of the Official World Golf Rankings in 2004. His best performance in a major championship came in 2002, where he lost in a fourway play-off to Ernie Els at The Open Championship.
In 2010, during the final round of the inaugural Greenbrier Classic, Appleby became the fifth player in history to shoot a 59 in an official PGA Tour event. Appleby won the 2010 PGA Tour Comeback Player of the Year award.