Erna Sack (born 6 February 1898, Spandau, Berlin, - died 2 March. 1972, Mainz), was a German coloratura soprano of exceptional talent. Erna Sack's maiden name was Weber, and as a child her voice attracted attention both at school and in the church choir in which she sang. In 1921, Erna married Hermann Sack. She studied at the Prague Conservatory, and later in Berlin with Oscar Daniel.