Justice O'Brien

Justice O'Brien may refer to:


 * Charles H. O'Brien (1920–2007), associate justice of the Tennessee Supreme Court
 * Denis O'Brien (politician) (1837–1909), judge of the New York Court of Appeals
 * Henry X. O'Brien (1903/04–1990), associate justice of the Supreme Court of Pennsylvania
 * John F. O'Brien (judge) (1874–1939), chief judge of the New York Court of Appeals
 * Thomas D. O'Brien (1859–1935), associate justice of the Minnesota Supreme Court