Esther Réthy (22 October 1912 – 28 January 2004) was a Hungarian operatic soprano who had a major career in Europe from 1934 through 1968. She was notably a principal artist at the Vienna State Opera for over a decade and was a frequent performer at the Salzburg Festival. She performed a broad opera repertoire that encompassed French, German, Italian, Czech, and Hungarian operas. The latter part of her career was dedicated mainly to performing the German operetta literature at the Vienna Volksoper. A very beautiful woman, she was a greatly admired Angele in Richard Heuberger’s Der Opernball.