Karin Branzell (24 September 1891 – 15 December 1974) was a Swedish operatic contralto (sometimes described as a mezzo-soprano), who had a prominent career at the Metropolitan Opera, New York, and in Europe. Her very wide range enabled her to sing both contralto roles and the occasional soprano role. She was particularly noted for her singing of the music of Richard Wagner, in roles such as Ortrud (Lohengrin), Venus (Tannhäuser), Erda (Das Rheingold and Siegfried), Brangäne (Tristan und Isolde), and Brunnhilde (Die Walküre). She was considered on a par with Margarete Klose and Kerstin Thorborg as a Wagnerian contralto. Amneris (Aida), Dalila (Samson et Dalila), Herodias (Salome), and Clytemnestra (Elektra) were among her other renowned roles.