Arthur D'Arcy "Bobby" Locke (20 November 1917 – 9 March 1987) was the first internationally successful South African professional golfer. He won four Open Championships.

Locke was born in Germiston, South Africa. He won the South African Open for the first of nine times in 1935, playing as an amateur. He played in his first Open Championship in 1936, when he was eighteen, and finished as low amateur. He turned professional two years later and was a prolific tournament winner in his native country, eventually accumulating 38 wins on the Southern Africa Tour (now the Sunshine Tour). His golf career was interrupted by service in the South African Air Force during World War II.

Following the end of World War II, Locke successfully resumed his career in South Africa in 1946. He hosted Sam Snead, one of the top American golfers of the day, for a series of exhibition matches in South Africa in 1946, winning 12 out of the 16 matches. So impressed was Snead that he suggested that Locke come to the United States and give the PGA Tour a try, advice that Locke quickly followed.