Archduke Carl Ludwig of Austria (Carl Ludwig Maria Franz Joseph Michael Gabriel Antonius Robert Stephan Pius Gregor Ignatius Markus d'Aviano; 10 March 1918 – 11 December 2007), also known as Carl Ludwig Habsburg-Lothringen, was the fifth child of Charles I of Austria and Princess Zita of Bourbon-Parma.
He was born in Baden bei Wien and died in Brussels.