Oliver Leonard Kirk (April 20, 1884 – March 14, 1960) was an American bantamweight and featherweight professional boxer who won two gold medals in Boxing at the 1904 Summer Olympics.

He was born in Beatrice, Nebraska and died in St. Louis, Missouri.

Kirk only had to win two fights to capture his two gold medals, in the bantamweight class only two boxers competed.

In the featherweight class there were three boxers with Kirk earning the bye in the first round.

This article about a boxing Olympic medalist of the United States is a stub.