Samuel William "Sam" Jacobs, KC, (May 6, 1871 – August 21, 1938) was a Canadian lawyer, Member of Parliament and a leader of the Canadian Jewish community. For many years he was the only Jewish MP in the House of Commons of Canada. He was first elected from the Montreal riding of George-Étienne Cartier (later known as Cartier) in the 1917 federal election as a Laurier Liberal and remained in parliament as a Liberal MP until his death in 1938.