Karl Borris (3 January 1916 – 18 August 1981) was a World War II Luftwaffe military aviator and test pilot. As a flying ace, he is credited with 43 victories, all of them over the Western Front, for which he was awarded the Knight's Cross of the Iron Cross, the highest award in the military and paramilitary forces of Nazi Germany during World War II. Borris was involved in the introduction of the Focke-Wulf Fw 190 to front line service. Borris and 30 other pilots, technicians and engineers extensively tested the Fw 190 and their input was used in the decision to continue the project.