The 1903 Open Championship was the 43rd Open Championship, held 10–11 June at Prestwick Golf Club in Prestwick, South Ayrshire, Scotland. Harry Vardon won the Championship for the fourth time, six strokes ahead of runner-up Tom Vardon, his younger brother. All entries played 36 holes on the first day with all those within 19 strokes of the leader making the cut and playing 36 holes on the final day, with the additional provision that the final day's field had to contain at least 32 professionals.