Waltraud Meier (born 9 January 1956 in Würzburg) is a Grammy Award–winning German dramatic soprano and mezzo-soprano singer. She is particularly known for her Wagnerian roles as Kundry, Isolde, Ortrud, Venus, Fricka, and Sieglinde, but has also had success in the French and Italian repertoire appearing as Eboli, Amneris, Carmen, and Santuzza. She resides in Munich.

Meier has performed in the world's famed opera houses (including La Scala, Covent Garden, Metropolitan Opera, the Vienna State Opera, the Bavarian State Opera, Lyric Opera of Chicago, and Colón Theater). She has also performed Wagner at the Mecca of Wagner performance, the Bayreuth Festspielhaus. She has performed under the batons of conductors including Riccardo Muti, Daniel Barenboim, Claudio Abbado, James Levine, Lorin Maazel, Zubin Mehta, and Giuseppe Sinopoli. She has been named a "Kammersngerin" by both the Bavarian State Opera in Munich and the Vienna State Opera, and "Commandeur" of the Ordre des Arts et des Lettres by the French Government.