Robert Mosley (1927 – April 30, 2002) was an American operatic bass-baritone. Part of the first generation of African-American opera singers to achieve wide success, he performed in numerous opera productions, recitals, and in concerts from the 1950s through the 1990s. In 1957 he won the Metropolitan Opera National Council Auditions. He drew particular acclaim for his portrayal of Porgy in George Gershwin's Porgy and Bess, a role which he portrayed in the landmark 1976 Houston Grand Opera production, on Broadway, and at the Metropolitan Opera among other opera companies both in the United States and in Europe.