Stephanie Blythe (born 1970) is an American mezzo-soprano who has had an active international career in operas and concerts since the early 1990s. She is particularly associated with the Metropolitan Opera in New York City, with whom she has performed annually since her debut with the company in 1995. In 2014 she starred as Gertrude Stein in the world premiere of 27, an opera composed by Ricky Ian Gordon with libretto by Royce Vavrek, and commissioned for her by the Opera Theatre of Saint Louis.