Walther Kausch (17 July 1867, Königsberg – 24 March 1928, Berlin) was a German surgeon.
From 1896 to 1906 he worked at the university surgical clinic in Breslau, training under professor Jan Mikulicz-Radecki (1850-1905).
After the death of his father-in-law in 1905, Kausch became head of the clinic in an acting capacity.
In 1905, he was elected medical director and head of the I. surgical department at the Städtisches Augusta-Viktoria-Krankenhaus in Berlin-Schöneberg, then still under construction.
He headed the Augusta-Viktoria-Krankenhaus and its surgical department until his death from fulminant pulmonary emboli following perforating appendicitis on 24 March 1928.