Yaakov Herzog (Hebrew: יעקב הרצוג, 11 December 1921 – 9 March 1972) (50) was an Israeli diplomat.
Yaakov Herzog was born in Dublin, Ireland. His father was Yitzhak HaLevi Herzog, the second Ashkenazi Chief Rabbi of Israel, and his brother, Chaim Herzog, became the sixth President of Israel. The family immigrated to Mandate Palestine in 1937. After he was ordained as a rabbi in the Harry Fischel Seminary in Jerusalem, Herzog studied law at the Hebrew University of Jerusalem and London University. He earned a doctorate in international law from McGill University in Montreal. Herzog served in Shai (Haganah unit) in the Haganah.
After the founding of the State of Israel, Herzog worked for the Israel Ministry of Foreign Affairs. From 1948 to 1954 he counseled on issues relating to Jerusalem. From 1954 to 1957 he was the chief of the United States division. He advised Prime Minister of Israel David Ben-Gurion on policy from 1956 to 1957.
From 1957 to 1960 Herzog was the minister at the Israeli embassy in Washington D. C., and from 1960 to 1963 he was the Israeli ambassador to Canada.