James Wallace O'Connor (August 25, 1903 – October 11, 1950) was an American competition swimmer and water polo player for Stanford University who played internationally for the United States at four Olympiads: at the 1924, 1928, 1932 and 1936.

[3] He swam and played Water Polo for Stanford University from 1920-1923, under Head Coach Ernst Brandsten.

[3][1][4] From 1923-1936, he swam and played Water Polo for the Venice Swim Association, and the Los Angeles and Illinois Athletic Clubs.

[3] O'Connor swam on a National Championship relay for Hall of Fame coach Bill Bachrach’s Illinois Athletic Club.

[2] At the 1928 Summer Olympics bronze medal match, O'Connor and the U.S. Water Polo team lost to France.