Horace Sedger (1853–1917) was an American-born British theatre manager and impresario. He was particularly associated with light opera, and presented works by composers including Isaac Albéniz, Edmond Audran, Ivan Caryll, Alfred Cellier, Charles Lecocq and André Messager and librettists including W. S. Gilbert, Arthur Law and B. C. Stephenson. His most successful productions were Cellier's Dorothy (1886), which ran for an unprecedented 931 performances, and an English adaptation of Audran's La cigale et la fourmi (1891). Sedger was later active in the fledgling cinema industry.