|Date of birth||19 June 1944|
|Place of birth||Haifa, Mandatory Palestine|
|Faction represented in Knesset|
|2003–||Mayor of Haifa|
Yahav was born in Haifa during the period of the Mandate era. During his national service he reached the rank of lieutenant colonel in the Military Police Corps of the IDF. He studied law at the Hebrew University of Jerusalem, gaining a LL.B, before continuing his legal studies at the University of London, where he served as secretary-general of the World Union of Jewish Students.
When he returned to Israel, Yahav became active in politics. He was an advisor to Minster of Transport Gad Yaacobi and the spokesman of Teddy Kollek, mayor of Jerusalem. In 1996 he was elected to the Knesset on the Labor Party list, and served as the chairman of the subcommittee for banking. However, he lost his seat in the 1999 elections.
Yahav later left Labour and joined Shinui. In 2003 he was elected mayor of Haifa on a joint Shinui-Greens ticket, having already served as deputy mayor. On 29 June 2006 he defected to Kadima, but remained mayor of the city. He is also chairman of the Haifa Economic Corporation and previously chaired the Haifa International Film Festival organisation and the city's theatre executive.
- The Anatomy of the Fall of the Labor Party with Shevah Weiss (1977)
- Libel and Slander (1987, updated and re-released in 1996)
- Asher, Danny (April 2008). Red and Blue - A Corps's Story 1948–2008 (in Hebrew). Israeli Ministry of Defense. p. 53.
- Yona Yahav on the Knesset website