Paul Plishka (born August 28, 1941) is an American operatic bass.
Plishka comes from Old Forge, Pennsylvania, and Paterson, New Jersey; his parents were American-born children of Ukrainian immigrants. He studied at Montclair State College and with Armen Boyajian (also the pedagogue of Marisa Galvany, Harry Theyard, and fellow basso Samuel Ramey), and made his operatic debut with the Paterson Lyric Opera, in 1961.
Plishka made his formal debut with the Metropolitan Opera as the Monk in La Gioconda, in 1967. He became one of the company's leading basses, and has appeared in many other theatres, including the Teatro alla Scala (debut in La damnation de Faust, 1974) and the New York City Opera (I puritani, 1981). He retired from the Metropolitan Opera after playing the Sacristan in Tosca, on the Saturday broadcast on January 28, 2012. He had performed at the Metropolitan Opera for forty-six years and 1,642 performances, placing him at number ten on their official list of most-frequent performers, which dates back to the company's inception in 1883. There was a special tribute after Act I on stage, and on the air during the intermission.