Isaac "Buji" Herzog (Hebrew: יצחק "בוז'י" הרצוג‎, born 22 September 1960) is an Israeli politician and lawyer. He currently serves in the Knesset on behalf of the Labor Party as Minister of Welfare & Social Services and Minister of the Diaspora, Society, and the Fight Against Antisemitism. He was previously Minister of Housing and Building and Minister of Tourism.

Herzog is the son of Israeli President Chaim Herzog and Aura Herzog, and the grandson of Rabbi Yitzhak HaLevi Herzog. He was born in Tel Aviv and studied law at Tel Aviv University and Cornell University. Herzog is married with three children, and is nicknamed Buji.

Although he did not win a seat in the 1999 elections, Herzog served as government secretary in Ehud Barak's cabinet until 2001 when Barak was beaten by Ariel Sharon in a special election for Prime Minister. In 1999, he was also investigated in the 'Amutot Barak' scandal (a scandal involving allegations that the party funding law was violated), but maintained his silence. The Attorney General, therefore, decided to close the case against him due to lack of evidence. From 2000-2003, he served as chairman of the Israel Anti-Drug Authority.