John Joseph O'Connor

John Joseph O'Connor may refer to:
 * John O'Connor (cardinal), archbishop of New York
 * John J. O'Connor (bishop of Newark), American prelate of the Catholic Church.
 * John J. O'Connor (New York representative), U.S. Representative from New York
 * John J. O'Connor (journalist), American journalist and critic
 * Jack O'Connor (catcher), utility player in Major League Baseball