| Willie Auchterlonie | |
| Fullname: | William Auchterlonie |
| Nickname: | Willie |
| Birth Date: | 7 August 1872 |
| Birth Place: | St Andrews, Scotland |
| Death Place: | Kirkcaldy, Scotland |
| Status: | Professional |
| Majorwins: | 1 |
| Masters: | DNP |
| Usopen: | DNP |
| Open: | Won: 1893 |
| Pga: | DNP |
William "Willie" Auchterlonie (7 August 1872[1] – 27 February 1963[2] [3] [4] [5]) was a Scottish professional golfer. He was a native of St Andrews. He won the 1893 Open Championship[6] at the age of and he remains the second youngest Open Champion after Tom Morris, Jnr, but it was to prove to be his only Open. His brother, Laurie Auchterlonie, won the 1902 U.S. Open.
Auchterlonie was honorary professional to The Royal and Ancient Golf Club of St Andrews for nearly a quarter of a century. He had begun his working life as an apprentice to the club makers R. Forgan & Son[7] and he ran club making businesses for most of his adult life. There is still a golf shop called Auchterlonie's in St Andrews. He was involved in golf course design.