Several groups of people have claimed lineal descent from the Israelites, an ancient Semitic-speaking people who inhabited Canaan during the Iron Age. The phenomenon has become especially prevalent since the founding of the State of Israel in 1948. The country's Law of Return, which defines Jewishness for the purpose of aliyah, prompted many individuals to claim Israelite ancestry with the expectation that it would make them eligible for Israeli citizenship through their perceived Jewish ethnicity. The abundance of these claims has led to the rise of the question of "who is a Jew?" in order to determine the legitimacy of one's Jewish identity. Some of these claims have been recognized, while other claims are still under review, and others have been outright rejected.

The Israelites were a group of Semitic-speaking tribes in the ancient Near East who, during the Iron Age, inhabited a part of Canaan. They were also an ethnoreligious group.