See Yohanan for more rabbis by this name.

Yohanan ben Zakkai (Hebrew: יוֹחָנָן בֶּן זַכַּאי‎, Yōḥānān ben Zakkaʾy; 1st century CE), sometimes abbreviated as Ribaz (ריב״ז‎) for Rabbi Yohanan ben Zakkai, was one of the Tannaim, an important Jewish sage during the late Second Temple period and in the transformative post-destruction era. He was a primary contributor to the core text of Rabbinic Judaism, the Mishnah. His name is often preceded by the honorific title, "Rabban." He is widely regarded as one of the most important Jewish figures of his time and his escape from the Roman destruction of Jerusalem, that allowed him to continue teaching, may have been instrumental in rabbinic Judaism surviving the destruction. His tomb is located in Tiberias, within the Maimonides burial compound.

Yohanan was the first Jewish sage attributed the title of rabbi in the Mishnah.