King Ferdinand
King Ferdinand may refer to:
- Ferdinand I of Aragon
- Ferdinand II of Aragon, also Ferdinand V of Castile and León, Ferdinand "the Catholic", King of Aragon, Sicily, and Navarre, first king of a unified Kingdom of Spain
- Ferdinand I of León, "the Great"
- Ferdinand II of León
- Ferdinand III of Castile, "the Saint"
- Ferdinand IV of Castile, "the Summoned"
- Ferdinand I, Holy Roman Emperor, also Ferdinand I of Bohemia, Hungary and Croatia
- Ferdinand II, Holy Roman Emperor, also Ferdinand II of Bohemia, Hungary and Croatia
- Ferdinand III, Holy Roman Emperor, also Ferdinand III of Bohemia, Hungary and Croatia
- Ferdinand IV, King of the Romans, also King of Bohemia, and King of Hungary and Croatia
- Ferdinand I of Austria, also Ferdinand V of Bohemia, Hungary and Croatia
- Ferdinand I of Naples
- Ferdinand II of Naples
- Ferdinand I of the Two Sicilies, also Ferdinand IV of Naples, and Ferdinand III of Sicily
- Ferdinand II of the Two Sicilies
- Ferdinand VI of Spain
- Ferdinand VII of Spain
- Ferdinand I of Portugal
- Ferdinand II of Portugal
- Ferdinand I of Romania
- Ferdinand I of Bulgaria