Mordechai Zar (Hebrew: מרדכי זר; Persian: مُردِخای زر, 14 January 1914 – 15 November 1982) was an Israeli politician who served as a member of the Knesset for Mapai and its successors between 1959 and 1974.

Born in Mashhad in Iran, Zar made aliyah to Mandatory Palestine in 1935.

In 1946 he became director of the Mizrachi Jew department of the Histadrut trade union.

He also served as a member of Jerusalem Workers Council, and was director of its Culture Department.

Although he lost his seat in the 1961 elections, he returned to the Knesset on 17 May 1963 as a replacement for the deceased Ami Assaf.