Sarah Elizabeth Royle Walker CBE (born 11 March 1943) is an English mezzo-soprano.
Walker was born in Cheltenham, Gloucestershire. She studied at the Royal College of Music from 1961 to 1965, initially as a violinist and cellist, and went on to study singing with Vera Rózsa. She has appeared in numerous opera performances and is also known as a concert soloist and recitalist.