Irwin Gage (September 4, 1939 in Cleveland, Ohio – April 12, 2018 in Zürich) was an American pianist, specializing in accompanying Lieder.

Gage studied piano, musicology and literature at the University of Michigan and Yale, and later with Erik Werba at the Vienna Music Academy. He performed as a soloist, but above all was sought as a collaborator by singers such as Elly Ameling, Gundula Janowitz, Cheryl Studer, Christa Ludwig, Walter Berry, Dietrich Fischer-Dieskau, Peter Schreier, Brigitte Fassbaender and Jessye Norman. From his work with such international elite singers numerous award-winning recordings emerged.

In 1970, he planned and accompanied an entire series of Lieder recitals at the Vienna Konzerthaus. From 1979 to 2005, Gage headed a song interpretation class at the Academy of Music and Theater in Zurich (now Zurich University of the Arts). In 2001, he was also appointed to a professorship for song interpretation at the Saarbrücken Music Academy, where he initiated a nationally unique program entitled "Song Duo."

Irwin Gage gave master classes in Europe, Japan and the USA. He was a consultant and artistic director of concert series at various houses, including the Cologne Philharmonic. He sat on many juries for singing, song duo, chamber music and solo piano at international music competitions.