Sarnoff is a surname. Notable people with the surname include:
Ann Sarnoff (born c. 1962), American businesswoman Arthur Sarnoff (1912–2000), American artist David Sarnoff (1891–1971), Belarusian-born American radio and television technology pioneer and businessman Dorothy Sarnoff (1914–2008), American operatic soprano, musical theatre actress and image consultant Elizabeth Sarnoff, American television writer and producer Robert W. Sarnoff, American businessman Sarnoff A. Mednick (1928–2015) Stanley Sarnoff (died 1990), surgeon and inventor of medical devices