Michael Joseph O'Dowd (April 5, 1895, in St. Paul, Minnesota – July 28, 1957) was an American boxer who held the World Middleweight Championship from 1917 to 1920.

O'Dowd won the title on November 14, 1917, by knocking out Al McCoy in the sixth round after dropping him six times.

[2] O'Dowd was the only active boxing champion to fight at the front during World War I (1918, while serving in the U.S.

[3] During his career he claimed victories over Hall of Famers Jack Britton, Mike Gibbons, Kid Lewis and Jeff Smith.

[4] O'Dowd died on July 28, 1957, from a heart attack at a Veteran's hospital, aged 62.