Irene Jessner (August 28, 1901 – January 10, 1994) was an Austrian-born American soprano and music educator. She began her opera career in Europe in 1930. From 1936 to 1952 she was a principal soprano at the Metropolitan Opera. She became a naturalized American citizen in 1938. While she was particularly associated with the operas of Richard Strauss and Richard Wagner, her repertoire also encompassed works from the Italian and French opera literature. Her most celebrated roles were Chrysthomenis in Elektra, the Marschallin in Der Rosenkavalier, and Sieglinde in Die Walküre; all parts which she recorded and which she performed both at the Metropolitan Opera and as a guest artist with other organizations. She was a celebrated voice teacher at the University of Toronto from 1952 until her retirement in 1986. She also taught on the faculty of The Royal Conservatory of Music in the 1950s. Several of her pupils had successful careers, including Teresa Stratas. Canadian musicologist Carl Morey described her as "one of the few truly outstanding voice teachers in Canada.”