Ilse Schwidetzky (married name Rösing, 6 September 1907, in Lissa – 18 March 1997, in Mainz) was a German anthropologist.
Georg Schwidetzky studied law and had a successful political career which ended with World War I.
The family moved to Leipzig, where Georg Schwidetzky worked for Die Deutsche Bücherei, roughly equivalent to the Library of Congress.
From the 1930s, she worked as the assistant of Egon Freiherr von Eickstedt, one of the leading racial theorists of Nazi Germany.
He was the only member of Ilse Schwidetzky's closer family who died during World War II.