Theo Adam (1 August 1926 – 10 January 2019) was a German operatic bass-baritone and bass singer who had international career in opera, concert and recital from 1949. He was a member of the Staatsoper Dresden for his entire career, and sang at the Bayreuth Festival from 1952 to 1980. He particularly excelled in portraying roles by Richard Wagner, especially Wotan in Der Ring des Nibelungen, which he also performed at the Metropolitan Opera, among others. In concert, he was a much admired Bach singer and also drew acclaim for his interpretation of the title character of Mendelssohn's Elijah. He was a voice teacher at the Musikhochschule Dresden.