Carl Johann Kiefert (also Johann Carl; 1855 – 26 November 1937) was a German-British conductor and composer, who spent much of his career conducting at the Hippodrome and other London theatres. He was the musical director of the original London productions of such musical theatre pieces as His Excellency (1894), An Artist's Model (1895), Florodora (1899) and The Quaker Girl (1910).