Archduke Felix of Austria (given names: Felix Friedrich August Maria vom Siege Franz Joseph Peter Karl Anton Robert Otto Pius Michael Benedikt Sebastian Ignatius Marcus d'Aviano; 31 May 1916 – 6 September 2011) was the last surviving child of the last Austrian Emperor Charles I and a member of the House of Habsburg.
He was a younger brother of former Crown Prince Otto of Austria, who predeceased Felix by two months.