Marianne Oswald (January 9, 1901 – February 25, 1985) was the stage name of Sarah Alice Bloch, a French singer and actress born in Sarreguemines in Alsace-Lorraine.
She took this stage name from a character she much admired, the unhappy Oswald in the Ibsen play Ghosts.
She was noted for her hoarse voice, heavy half-Lorraine, half-German accent, and for singing about unrequited love, despair, sadness, and death.
She sang the songs of Kurt Weill and Bertolt Brecht.