Prince Karl Alfred of Liechtenstein (Karl Alfred Maria Johannes Baptista Heinrich Alois Georg Hartmann Ignatius; 16 August 1910 – 17 November 1985) was a prince and brother of Franz Joseph II.

He was the third child and second son of Prince Alois of Liechtenstein and Archduchess Elisabeth Amalie of Austria.

She was the second child and eldest daughter of Archduke Hubert Salvator of Austria and Princess Rosemary of Salm-Salm.

They had seven children: In 1953, he and his wife were royal guests at the Coronation of Elizabeth II.

Prince Karl Alfred died on 17 November 1985.