The 2005 Masters Tournament was the 69th Masters Tournament, played from April 7–10 at Augusta National Golf Club in Augusta, Georgia.

Tiger Woods, 29, won his fourth green jacket on the first hole of a playoff with Chris DiMarco. Rain was a factor the whole week, and delayed much of the play. The purse was $7.0 million with a winner's share of $1.26 million. It was the ninth of Woods' fifteen major championships.

This Masters was the last as competitors for three former champions: Tommy Aaron (1973), Billy Casper (1970), and six-time winner Jack Nicklaus.

Ryan Moore was low amateur at 287 (−1), the best score by an amateur since 1978, and earned an exemption to the 2006 tournament.

Jerry Pate, a non-playing invitee, won the 46th Par-3 contest on Wednesday with a five-under 22.

1. Masters champions
Tommy Aaron, Billy Casper, Charles Coody, Fred Couples (10,16,17), Ben Crenshaw, Nick Faldo, Raymond Floyd, Bernhard Langer (10), Sandy Lyle, Phil Mickelson (10,11,12,14,15,16,17), Larry Mize, Jack Nicklaus, José María Olazábal, Mark O'Meara, Gary Player, Vijay Singh (4,10,13,14,15,16,17), Craig Stadler, Tom Watson, Mike Weir (11,14,16,17), Tiger Woods (2,3,4,14,15,16,17), Ian Woosnam, Fuzzy Zoeller

2. U.S. Open champions (last five years)
Jim Furyk (16,17), Retief Goosen (10,11,14,15,16,17)

3. The Open champions (last five years)
Ben Curtis, David Duval, Ernie Els (10,12,13,14,16,17), Todd Hamilton (12,14,16,17)