Karl Schmitt-Walter (23 December 1900 – 14 January 1985) was a prominent German opera singer, particularly associated with Mozart and the more lyrical Wagner baritone roles.
He subsequently appeared at provincial opera houses in Oberhausen, Saarbrücken, Dortmund and Wiesbaden, building a reputation for vocal excellence as he went along.
Schmitt-Walter made his key debut at the Berlin State Opera in 1935, as Luna in Il trovatore, which led to a long association with this important theatre, where he would sing wide repertory of lyric parts for the baritone voice.
Outside the Austro-German operatic heartland, he made guest appearances at the Paris Opéra, the Royal Opera House, Covent Garden, in London, the Liceo in Barcelona, La Monnaie in Brussels and the Holland Festival, among other major European venues.
Schmitt-Walter possessed a comparatively light, high-baritone voice of great beauty and was equipped with an exceptionally good singing technique.