Claus Karl Schilling (5 July 1871 in Munich, Bavaria, Germany – 28 May 1946 in Landsberg am Lech, Bavaria, West Germany), also recorded as Klaus Schilling, was a German tropical medicine specialist who participated in the Nazi human experiments at the Dachau concentration camp during World War II.
Though never a member of the Nazi Party and a recognized researcher before the war, Schilling became notorious as a consequence of his unethical and inhuman participation in human research under both Fascist Italy and Nazi Germany.
From 1942 to 1945, Schilling's research of malaria and attempts at fighting it using synthetic drugs resulted in over a thousand cases of human experimentation on camp prisoners.
Sentenced to death by hanging after the fall of Hitler's Germany, he was executed for his crimes against the Dachau prisoners in 1946.