Ruth-Margret Pütz (born Margret Doerkes, 26 February 1930 – 1 April 2019) was a German operatic coloratura soprano and teacher. She was born in Krefeld-Uerdingen, Rhenish Prussia, Germany. She was a member of the Staatsoper Stuttgart for many years as a guest at the Vienna State Opera. Her best known roles was as Konstanze in Mozart's "Die Entführung aus dem Serail". She was one of the leading sopranos of the 1960s.