Richard Lewis CBE (10 May 1914 – 13 November 1990) was a Welsh tenor.
Born Thomas Thomas in Manchester to Welsh parents, Lewis began his career as a boy soprano and studied at the Royal Manchester College of Music (now merged into the Royal Northern College of Music) from 1939 to 1941, and later at the Royal Academy of Music. He made his operatic debut in 1939, and from 1947 onwards, sang at the Glyndebourne Festival Opera and at Covent Garden (London). He made his debut in the United States in 1955.
Lewis made a number of recordings, including Messiah (Handel), L'incoronazione di Poppea (Monteverdi), Idomeneo (Mozart), Liebeslieder Walzer and Neue Liebeslieder Walzer (Brahms), Coleridge-Taylor's The Song of Hiawatha, Elgar's The Dream of Gerontius, Benjamin Britten's Spring Symphony (with Leonard Bernstein), scenes from William Walton's Troilus and Cressida, and four different performances of Mahler's Das Lied von der Erde, two with Maureen Forrester, (Reiner/Walter) one with Kathleen Ferrier (Barbirolli), and a fourth with Lili Chookasian (Ormandy). There is also a live recording with George Szell and the Cleveland Orchestra.