Gregory Fenton Buckingham (July 29, 1945 – November 11, 1990) was an American competition swimmer, Olympic silver medalist, and former world record-holder in two events.

[3][4][5][6] Buckingham attended Menlo-Atherton High School in Atherton, California, where he swam for coach Bob Gaughran, a swim team captain and outstanding swimmer at College of the Pacific.

By April 1965, while training with Santa Clara, at the age of 19, Buckingham competed in the 400-yard individual medley at the AAU National championships at Yale, and set an American record.

[15][16] Transferring to Stanford University where he swam under International Swimming Hall of Fame Coach Jim Gaughran, in 1966–67 Buckingham set world and American records in both the 200 and 400-meter individual medley.

[20] His second-place performance completed an American sweep of the event with Charlie Hickcox winning the gold medal (2:12.0) and John Ferris taking the bronze (2:13.3).

Because of his versatility with all four strokes, his coach at Santa Clara Swim Club, George Haines, considered him one of the greatest all-round swimmers of his era.