Sir Isidore Spielmann,C. M. G., F. S. A., (b. London, 21 July 1854 - d. 1925) was a British art critic, impresario and exhibition organizer. Spielman compiled the book, Royal Commission : St. Louis InternationalExhibition, 1904, an account of the British exhibition at the St. Louis World's Fair, which he took part in organizing. The book was published by the Royal Commission in 1906. Spielmann was Britain's Commissioner for Art for the 1908 Franco-British Exhibition.