Peter Elkus (born in 1939 in San Francisco, California) is a voice teacher giving master classes for both singers and instrumentalists. His classes have been presented in institutions in ten countries, including the University of Music and Performing Arts, Vienna, the Munich State Opera, the Accademia Musicale Ottorino Respighi in Assisi and Rome, the Théâtre des Champs-Élysées in Paris and the Teatro Colón in Buenos Aires.