Tom O'Brien (footballer, born 1904)

Thomas "Tom" O'Brien (born 1904, date of death unknown) was an Irish professional footballer who played as a left back.

O'Brien began his career in Ireland before moving to England to join Manchester United in May 1926. He made his debut for United against Aston Villa on 4 September 1926, and went on to make a total of 38 appearances for the club in the Football League. He left Manchester United in 1929 and joined Stockport County.

Details regarding his early life, clubs played for in Ireland (if any), and career after Stockport County are currently unavailable. Information regarding his death date and place is also unknown.