Günther Leib (born 12 April 1927) is a German operatic baritone and professor of voice.
A Kammersänger of the Dresden State Opera, he sang leading baritone roles both in his native Germany and internationally during the course of his stage career.
In 1971 he was awarded the Robert Schumann Prize of the City of Zwickau and in 2017 on the occasion of his 90th birthday the "Gotha-Medaille" (Gotha Medal), honoring him for his international career as "Gotha's most famous voice".
He appears in a number of complete opera and oratorio recordings on the Eterna, Supraphon, and Deutsche Grammophon labels.