Jewish assimilation refers either to the gradual cultural assimilation and social integration of Jews in their surrounding culture or to an ideological program in the age of emancipation promoting conformity as a potential solution to historic Jewish marginalization.

Israeli Jews or Jewish Israelis comprise Israel's largest ethnic and religious community. The core of their demographic consists of those with a Jewish identity and their descendants, including ethnic Jews and religious Jews alike. Approximately 99% of the global Israeli Jewish population resides in Israel; yerida is uncommon and is offset exponentially by aliyah, but those who do emigrate from the country typically relocate to the Western world. As such, the Israeli diaspora is closely tied to the broader Jewish diaspora.