Ada Blanche (born Ada Cecilia Blanche Adams; 16 July 1862 – 1 January 1953) was an English actress and singer known early in her career for vivacious performances in Victorian burlesque and pantomime and later in character roles in Edwardian musical comedy.
Born into a theatrical family, Blanche made her stage debut at the age of fourteen and had a forty-five year career, almost exclusively on the British stage, in the West End and on tour. In the 1890s she was a leading principal boy in London's most lavishly staged pantomimes. In the 20th century her career changed to playing comic, formidable older women. Her most celebrated role of this kind was in the hit musical The Arcadians (1909), staged by her brother-in-law Robert Courtneidge.
Beyond musical comedy, Blanche appeared in farces and other comedies in non-singing roles between 1906 and her retirement in 1921. Among her co-stars during her long career were George Grossmith Jr., Dan Leno, Marie Lloyd, Walter Passmore, Kate Santley and Little Tich.