Jay James O'Brien (February 22, 1883 – April 5, 1940) was an American bobsledder who competed in the late 1920s and early 1930s.

He won two medals at the Winter Olympics with a gold in the four-man event at Lake Placid, New York, in 1932 and a silver in the five-man event at St. Moritz in 1928.

O'Brien was also a jockey,[1] and was head of the United States Olympic Bobsled Committee at the time of the 1932 Winter Olympics in Lake Placid.

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