Oscar Byström (31 December 1857 – 4 June 1938) was a Swedish actor. Byström debuted in 1884 at the Royal Dramatic Theatre. During 1885-1886, when he was involved in the theater company of Oscar Sternvall-Skottes . Byström was employed at the Royal Dramatic Theatre from 1890-1893. From 1907, he was as deputy director at the Vasateatern.His career in film started with a small role in Gösta Berlings saga (1924). He was married in 1896 to actress Constance Ericsson-Behrens (1868-1952).