Rachel Yakar (3 March 1936 – 24 June 2023) was a French operatic soprano and academic voice teacher. She was known for Mozart roles such as Elvira in Don Giovanni, Baroque opera and contemporary opera. She was a member of the Deutsche Oper am Rhein from 1964 to 1991, and appeared also in Paris, at the Royal Opera House in London and at festivals including Bayreuth and Glyndebourne. She received international attention as Poppea in the 1977 production of Monteverdi's L'incoronazione di Poppea at the Oper Zürich conducted by Nikolaus Harnoncourt, which was recorded and filmed. She made many more recordings reviving Baroque operas in historically informed performance. Her portrayal of Debussy's Mélisande was described as ideal. She was admired not only for her voice and diction but also for her stage presence. After her retirement from the stage she taught at the Paris Conservatoire. Ivan A. Alexandre from Diapason summarised her performing: "A darling of the Baroque pioneers and a Mozartian at heart and in style, the soprano from Lyon was also the intimate voice of Strauss, Debussy and Messiaen."