Jewish identity is both ethnic and religious, which is why scholars and Jewish communities themselves use the term “ethno-religious group” to describe it. Unlike most major religions, Judaism is tied to a specific people, a shared ancestral homeland, a common language, and a genetic lineage that stretches back thousands of years. You can be ethnically Jewish without practicing the religion, and you can become fully Jewish through conversion without any ancestral connection. That dual nature is what makes the question more interesting than a simple yes or no.
Why “Ethnoreligious” Fits Better Than Either Term Alone
The American Jewish Committee describes Jewish people as “an ethno-religious group and nation originating in the Land of Israel.” That three-part framing (ethnic group, religion, nation) captures something most categories miss. Jews share a common language in Hebrew, a body of literature and liturgy, familial ties, customs passed across generations, and a historical connection to a specific geographic homeland. These are the hallmarks of an ethnic group, not just a faith community.
This is why many Jews describe themselves as “a People” with a capital P. Roughly 81% of American Jews say caring about Israel is an important or essential part of what being Jewish means to them, a finding consistent across both the Pew Research Center and the American Jewish Committee’s 2024 antisemitism report. That sense of peoplehood persists even among secular Jews who never set foot in a synagogue. A Jewish atheist is still Jewish in a way that a lapsed Catholic is not typically considered Catholic. The identity runs deeper than belief.
What Genetics Reveal About Shared Ancestry
Genetic research has confirmed what Jewish tradition has long maintained: Jews around the world share common biological roots. A landmark study published in the American Journal of Human Genetics analyzed DNA from Ashkenazi Jews (European descent), Sephardic Jews (Spanish and Portuguese descent), and Mizrahi Jews (Middle Eastern descent) and found that all three groups share genome-wide genetic markers that distinguish them from other world populations. Individuals within each group were roughly as genetically related as fourth or fifth cousins.
Those shared markers point to common roots going back more than 2,000 years. This held true despite centuries of geographic separation and intermarriage with surrounding populations. Ashkenazi Jews, for instance, show between 30% and 60% genetic mixing with European populations, yet they still cluster more closely with Middle Eastern and Sephardic Jews than with their European neighbors. As University of Pennsylvania geneticist Sarah Tishkoff summarized it: the data clearly shows “a genetic common ancestry of all Jewish populations.”
That shared genetics has practical medical consequences. Certain inherited conditions appear far more frequently in Jewish populations, particularly among Ashkenazi Jews. Roughly 1 in 31 Ashkenazi Jews carries a gene variant for Tay-Sachs disease, and about 1 in 18 carries a variant for Gaucher disease. Medical guidelines recommend that Ashkenazi Jews who are pregnant or planning pregnancy be offered screening for a panel of conditions including Tay-Sachs, Canavan disease, familial dysautonomia, cystic fibrosis, and several others. These patterns exist because of genetic drift in a historically small, relatively insular population, the same forces that shape any ethnic group’s genetic profile.
Multiple Ethnicities Within One People
Calling Jewish identity “an ethnicity” in the singular actually understates the complexity. The world’s roughly 13 million Jews belong to distinct subgroups, each with its own languages, foods, music, and customs shaped by centuries in different regions.
- Ashkenazi Jews trace their communities to Central and Eastern Europe. They developed Yiddish, a language blending Hebrew and German, and account for the majority of Jews in North America.
- Sephardic Jews descend from the Jewish communities of medieval Spain and Portugal. After the 1492 Edict of Expulsion forced them to convert or leave, most migrated to Ottoman territories (modern-day Turkey, Greece, and the Balkans) or to North Africa. Many spoke Ladino, a blend of Hebrew and Spanish, and a smaller group in Morocco developed a dialect called Haketia.
- Mizrahi Jews is a more recent umbrella term meaning “Eastern,” covering communities from across the Middle East, North Africa, and Central Asia. It encompasses groups as diverse as Farsi-speaking Persian Jews, Arabic-speaking Jews of Iraq and Egypt, and Berber-speaking Jews of Morocco’s Atlas Mountains. Some of these communities date back millennia, well before the Roman-era dispersions that created the Ashkenazi and Sephardic branches.
These subgroups have distinct genetic profiles, different liturgical traditions, and cuisines that have almost nothing in common with each other. An Iraqi Jewish family’s kitchen bears little resemblance to a Polish Jewish family’s. Yet all three groups share that core genetic ancestry, the same sacred texts, and the same understanding of themselves as one people. Jewish ethnicity, in other words, is not a single uniform category but a family of related ethnic identities united by a common origin story, religion, and sense of mutual belonging.
How Conversion Complicates the Ethnic Label
One feature that sets Jewish identity apart from a purely ethnic category is that people can join it. A person who converts to Judaism does not simply adopt a new set of spiritual practices. They join the Jewish people. Under Jewish law, a convert is fully Jewish, with the same status as someone born to a Jewish mother. A convert who later stops practicing remains Jewish. There is no partial membership.
This creates a real tension with DNA-focused definitions of Jewishness. A convert does not carry the genetic markers researchers associate with Jewish ancestry, yet Jewish tradition insists they are as Jewish as anyone born into the community. They inherit Jewish history, culture, connection to the homeland, and communal obligations. In a meaningful sense, they start their own branch of a Jewish family tree.
This openness to conversion is actually consistent with Jewish history. Jewish communities have always absorbed newcomers, which is part of why genetic studies find significant admixture with surrounding populations in every branch. There is no single “Jewish ethnicity” in a rigid biological sense, but rather a multitude of ethnic backgrounds that have been woven into the Jewish people over thousands of years.
How Governments Handle the Classification
Legal systems have struggled with this question too. The U.S. Census does not include “Jewish” as a racial or ethnic category. Jews in America are generally classified as white, though many Jews of Middle Eastern or North African descent find that label a poor fit for their experience.
Israel takes a different approach. The Law of Return grants almost automatic citizenship to any Jew who wishes to immigrate, defining “Jew” as a person born to a Jewish mother or who has converted to Judaism and does not practice another religion. The law extends this right to the children and grandchildren of Jews and their spouses. Under Israeli nationality law, a Jewish immigrant becomes a citizen upon arrival with no waiting period. This legal framework treats Jewishness as something closer to national or ethnic membership than religious affiliation, while still recognizing conversion as a valid path in.
Neither system fully captures the reality. Jewish identity sits at the intersection of ethnicity, religion, culture, and nationhood, overlapping with each category without fitting neatly inside any one of them. The most accurate answer to “is Jewish an ethnicity?” is that it includes ethnicity as a core component, but it has never been only that.