Ludwig Donath (6 March 1900, Vienna-29 September 1967, New York City), was an Austrian actor who appeared in many American films.

Donath graduated from Vienna's Academy of Dramatic Art and became a prominent actor on the stage in Berlin. He moved to the USA in 1933 when Hitler came to power and began his American film career with Lady from Chungking (1942). He went on to appear in dozens of films, including Gilda (1946), The Jolson Story (1946), Jolson Sings Again (1949), The Great Caruso (1951), My Pal Gus (1952), Sirocco (1951), Torn Curtain (1966). He also appeared frequently on television and on Broadway. He died of leukemia in 1967.