Morris Lyon Marks (7 September 1824 – 4 March 1893) was a Jewish businessman remembered as a politician in the colony of South Australia.
He and his brother were, as M & S Marks, owners of the "Liverpool Mart" in Hindley Street, Adelaide's largest emporium.
He was a passenger on the steamer Osmanli, which hit a reef and sank in D'Estrees Bay, Kangaroo Island on 25 November 1853.
[2] He was elected to the South Australian House of Assembly, representing The Burra and Clare from March 1857 to August 1858,[3] when he resigned in order to make a trip to Europe.
Their children were His brother and business partner Solomon Lyon Marks (1827–1875) married Esther in 1846, the first marriage in the Adelaide Synagogue.