Yitzhak Shamir (born Icchak Jeziernicky; October 22, 1915 – June 30, 2012) is an Israeli politician and the seventh Prime Minister of Israel, serving two terms, 1983–84 and 1986–1992.

Before the establishment of the State of Israel, Shamir is a member of Lehi, and one of its commanders after Avraham Stern is killed.

After the establishment of the State of Israel he serves in the Mossad between 1955 and 1965, as a Knesset Member, as a Knesset Speaker and as a Foreign Affairs Minister.

Shamir is the country's third longest-serving prime minister after David Ben-Gurion and Benjamin Netanyahu.