Ga'ash (Hebrew: געש, lit. 'Storm') is a kibbutz in central Israel. Located in the coastal plain to the north of Tel Aviv, it falls under the jurisdiction of Hof HaSharon Regional Council. In 2024 it had a population of 956.

The village was named after the Biblical mountain of Gaash, beside the grave of Joshuah in Ephraim (Joshuah 24:30).^{[citation needed]}

The kibbutz was established on 5 July 1951 on land that had belonged to the depopulated Arab village of Khirbat al-Zababida. by a group of immigrants from South America who were members of the Latin America "A Group" of Hashomer Hatzair. The founders had defended Negba during the 1948 Arab–Israeli War, and had formed the kibbutz community at Ahli Kahsem near Bnei Zion in November 1949.^{[citation needed]}