Simcha Rotem (born Simcha (Szymon) Rathajzer, also known by his nom de guerre, Kazik; 24 February 1924 – 22 December 2018) was a Polish-Israeli veteran, who was a member of the Jewish underground in Warsaw, and served as the head courier of the Jewish Fighting Organization (ZOB), which planned and executed the Warsaw ghetto uprising against the Nazis.
He was one of the last two surviving Jewish fighters in the Warsaw uprising and the last surviving fighter from the 1943 Warsaw ghetto uprising.