This article summarizes the highlights of professional and amateur golf in the year 2004.
- April 11 - The Masters - Phil Mickelson wins the first major of his career
- June 20 - U.S. Open - Retief Goosen wins the second major (and U.S. Open) of his career
- July 18 - The Open Championship - Todd Hamilton wins at Royal Troon in a playoff over Ernie Els
- August 15 - PGA Championship - Vijay Singh wins in a three-hole playoff over Chris DiMarco and Justin Leonard
- January 11 - Mercedes Championships winner: Stuart Appleby, $1,060,000 (66-67-66-71—270)
- January 15-16 - At the age of 14, golf prodigy Michelle Wie becomes the youngest woman (and only the fourth overall) to play at a PGA Tour event, shooting 72-68 (even par) at the Sony Open in Hawaii at Waialae Country Club in her hometown of Honolulu. She missed the cut by one stroke.
- January 18 - South African Airways Open at Somerset West, South Africa winner: Trevor Immelman (71-69-69-67—276)
- January 25 - Phil Mickelson wins for the first time in 19 months, beating Skip Kendall on the first extra hole at the Bob Hope Chrysler Classic.
- February 1 - Jonathan Kaye breaks from the pack on the final day in the FBR Open, winning by shooting five birdies in seven holes.
- February 8 - Vijay Singh claims his first victory of 2004 at the AT&T Pebble Beach National Pro-Am.
- February 15 - John Daly ends an eight-year winless drought by beating Chris Riley and Luke Donald in the Buick Invitational.
- February 22 - Mike Weir wins his second Nissan Open.
- February 29 - Tiger Woods defeats Davis Love III to win the WGC-Accenture Match Play Championship for a record second year in a row
- February 29 - Annika Sörenstam wins her third ANZ Ladies Masters.
- March 28 - Grace Park wins the first major of the LPGA season, the Kraft Nabisco Championship, by one shot over 17-year-old Aree Song. Michelle Wie finished fourth, four shots behind Park.
- March 28 - Adam Scott wins The Players Championship by one shot over Pádraig Harrington. Scott is the tournament's youngest winner ever.
- May 9 - Se Ri Pak wins the LPGA Michelob ULTRA Open at Kingsmill, qualifying her for the World Golf Hall of Fame. She will not be eligible for induction, however, until she completes her 10th year on tour in 2007.
- June 13 - Annika Sörenstam successfully defends her title in the second major of the LPGA season, the LPGA Championship.
- June 20 - Retief Goosen captures a second U.S.Open victory, after Phil Mickelson falters over the closing holes at Shinnecock Hills chasing a second successive major.
- July 18 - Todd Hamilton wins The Open at Royal Troon, surprising many by beating Ernie Els in a playoff for the title, from a final-day leaderboard that also included recent major champions Mickelson, Goosen, Woods, and Mike Weir.
- August 15 - Vijay Singh wins the PGA Championship at Whistling Straits in a three-hole playoff with Chris DiMarco and Justin Leonard. Phil Mickelson finishes among the top ten for the fourth time in a major in 2004.
- September 6 - Vijay Singh replaces Tiger Woods at the top of the world rankings, ending Woods' reign of five years and four weeks. Singh, at the age of 41, enjoys his most successful season, winning nine times on the U.S.Tour.
- September 17–19 - Team Europe defeats Team USA 18½–9½ to retain the Ryder Cup. See 2004 Ryder Cup for more details.