King Otto

King Otto may refer to:


 * Otto of Greece (1815–1867), first modern king of Greece from 1833 to 1862.
 * Otto, King of Bavaria (1848–1916), King of Bavaria from 1886 to 1913 and nephew of the above
 * Otto I, Holy Roman Emperor, (912–973), also King of East Francia and Italy
 * Otto II, Holy Roman Emperor, (955–983), also King of East Francia and Italy
 * Otto III, Holy Roman Emperor, (980–1002), also King of East Francia and Italy
 * Otto IV, Holy Roman Emperor, (1175 or 1176–1218), one of two rival kings of the Holy Roman Empire
 * King Otto (film), a 2021 documentary film about football manager Otto Rehhagel