Arthur MacArthur is the name of:
Arthur MacArthur Sr. (1815–1896), lieutenant governor of Wisconsin and acting governor for four days; United States federal judge Arthur MacArthur Jr. (1845–1912), his son, general in the United States Army and the Military Governor of the occupied Philippines Arthur MacArthur III (1876–1923), his son, captain in the United States Navy Arthur MacArthur IV (born 1938), son of Douglas MacArthur and Jean MacArthur
See also Arthur McArthur (born 1988), Canadian music producer Arthur McArthur (politician) (1884 – after 1933), Australian politician