Mark Steven Doss (born July 2, 1957 in Cleveland, Ohio) is a Grammy Award-winning African-American bass-baritone, specializing in opera, concert and recital. He has performed major roles with many international opera companies, including Milan's La Scala, Vienna State Opera, Lyric Opera of Chicago, San Francisco Opera, the Royal Opera House Covent Garden, Deutsche Staatsoper Berlin, Brussels' La Monnaie, Canadian Opera Company, and Oper Frankfurt.