Who Is a Jew? The Two Ways Jewish Identity Is Determined

"Who is a Jew?" sounds like it should be a simple question. But you would be amazed how many different answers people give. Is a Jew someone who observes Jewish law? Someone who lives in Israel? Someone who believes in a particular set of ideas? Someone who has Jewish ancestry?

The options and opinions are many, but according to Jewish law the answer is actually straightforward. There are exactly two ways to be a Jew.

Jewish Through Matrilineal Descent

If your mother is Jewish — through an unbroken chain of Jewish mothers going back through the generations — then you are Jewish. Period. It does not matter if you are observant or not. It does not matter if you have ever set foot in a synagogue. If your mother is Jewish, you are a Jew.

Here is what often surprises people: if your father is Jewish but your mother is not, you are not considered Jewish according to Orthodox Jewish law. And the reverse is also true — if your mother is Jewish and your father is not, you are fully Jewish.

This matrilineal principle is a core element of the Orthodox approach to Jewish law and has been the standard for thousands of years.

Jewish Through Conversion

The only other way to become Jewish is through a proper conversion to Judaism, performed under the authority of an Orthodox beis din (court of Jewish law). Conversion is a serious process that involves study, commitment to observing the mitzvos (commandments), and immersion in a mikvah (ritual bath). For men, it also includes circumcision.

Once a person has completed a legitimate conversion, they are fully Jewish — as Jewish as someone born to a Jewish mother. And their children, born after the conversion through Jewish matrilineal descent from the mother, are Jewish as well.

Once Jewish, Always Jewish

Here is something that many people do not realize: according to Jewish law, a Jew cannot stop being Jewish. Even if a Jewish person converts to another religion, they are still considered Jewish — a Jewish person who has made a serious mistake, but Jewish nonetheless.

Even if someone's family has not practiced Judaism for many generations, as long as their matrilineal descent is Jewish, they need no conversion. They are a Jew just like any observant Orthodox Jew. The neshama (soul) of a Jew is eternal, and no decision or circumstance can erase that identity.

Why This Matters

Jewish identity is not a membership you sign up for and cancel when it no longer suits you. It is not about what you believe or how you practice. It is about who you are — at the deepest level of your soul.

I have met people who discovered late in life that their mother's mother was Jewish, and they were stunned to learn that according to Jewish law, they had been Jewish all along. That is the power of this principle. Being Jewish is not something you do. It is something you are.

So now you know the answer to "who is a Jew." It is simpler than most people think — and more profound than most people realize.

The Conversion Path

For those not born Jewish, conversion to Orthodox Judaism is possible — but it is rigorous. It requires years of study, full integration into an Orthodox community, commitment to keeping all the commandments, and approval by a rabbinical court (beit din). The process is deliberately thorough because the commitment is permanent and total.

Once a person converts through a valid Orthodox beit din, they are 100% Jewish — with no asterisk, no qualification, no second-class status. The Torah specifically commands love for the convert, and this commandment appears 36 times. In our community, converts are deeply respected.

Why This Matters Today

The question "who is a Jew" is not academic. It affects:

• Marriage: An Orthodox Jew can only marry another Jew. If there is doubt about someone's Jewish status, it must be resolved before a wedding can proceed.
• Religious obligations: Jewish status determines whether someone is obligated in the 613 commandments, counted in a minyan, or called to the Torah.
• Israel's Law of Return: Israel's Law of Return grants citizenship under a deliberately broad definition — including someone with even one Jewish grandparent. But for matters of personal status like marriage, Israel's Chief Rabbinate applies the stricter halachic definition. The gap between these two standards creates ongoing tension.
• Denominational disagreements: Orthodox Judaism does not recognize Conservative or Reform conversions. This creates painful situations where someone considers themselves Jewish but is not recognized as such by Orthodox authorities.

Who Are the Jews — and What Do They Believe?

The Jews are a people — a family line and a faith community at once — descended from the biblical Abraham, Isaac, and Jacob, numbering roughly 15 million worldwide today. What do they believe? At the core: one G-d, who gave the Torah at Mount Sinai, and a covenant that makes conduct — honesty, charity, rest, holiness in ordinary life — the measure of the religion. The full map of Jewish beliefs is here; the point to hold onto is that Jewishness is peoplehood and religion braided together, which is why a non-practicing Jew is still a Jew, and why conversion is joining a family, not just adopting a creed.

Is Jewish a Race or a Religion?

Neither word really fits. Jews are a people — Am Yisrael, the nation of Israel — bound together by a covenant with G-d and by the religion that flows from that covenant. Not a race: there are Jews of every skin color and every background. Ashkenazi Jews from Europe, Sephardic Jews from Spain and the Middle East, Yemenite Jews, Ethiopian Jews, converts from every corner of the world — all equally Jewish.

The clearest proof that Jewishness is not racial: anyone can join. A person of any ancestry who completes a valid Orthodox conversion is 100% Jewish — and a woman who converts passes that status to every child she bears afterward. No racial category works that way — you cannot convert into a race.

But "religion" alone does not capture it either, because a Jew who never practices what Judaism teaches is still fully a Jew. You cannot resign from the Jewish people by dropping the beliefs, the way you could leave a church by no longer believing. Peoplehood and religion are braided together here in a way that Western categories — race, religion, ethnicity, nationality — never quite fit.

So when someone asks me "is Jewish a race or a religion?", my honest answer is: it is a family you can be born into or join. And the legal definition stays exactly what this page explains — a Jewish mother, or a halachic conversion.

What Race Is a Jew? Jews Are Not a Race

Put plainly: there is no Jewish race. History makes the point from its darkest side. Even the Nazis' Nuremberg Laws, written specifically to define Jews as a race, could not do it on biology — the 1935 decree had to fall back on counting how many of a person's grandparents had belonged to a Jewish religious community, because there was no biological test that could tell a Jew from a non-Jew. Ancestry common in a population is not the same thing as a marker you can point at a person.

Jewish law never needed the category at all. It asks one question — a Jewish mother, or a valid conversion — and that question has never had a racial answer.

Who Is a Jew in the Bible?

In the Bible, the Jews are the descendants of Avraham (Abraham), Yitzchak (Isaac), and Yaakov (Jacob) — the family G-d made a covenant with, which became the twelve tribes and then the nation of Israel.

Here is a detail most people never learn: the word "Jew" itself — Yehudi in Hebrew — comes from Yehudah (Judah), one of Yaakov's twelve sons. After King Solomon's kingdom split, the southern kingdom was named Yehudah after its dominant tribe, and its people came to be called Yehudim — Jews. Over time the name stretched to cover the whole people, whatever their tribe. By the book of Esther it already means any member of the nation: Mordechai is called an "ish Yehudi," a Jewish man (Esther 2:5), even though he came from the tribe of Binyamin (Benjamin), not Yehudah.

So "Israelite," "Hebrew," and "Jew" all describe the same biblical family at different points in its story — and the definition on this page, Jewish mother or conversion, is how that family has been traced ever since.

And who are the Gentiles in the Bible? Everyone else — all the nations outside that covenant family. The Hebrew word is "goy," which literally just means "nation," and the Torah is not shy about using it for Israel itself: G-d promises Avraham that He will make him a "great nation" — a goy gadol. Our English word "gentile" came in through the Latin word for "nations" that Bible translators used. So at its root, the word is not an insult at all — it is simply biblical Hebrew for the peoples of the world.

And the difference between a Jew and a Gentile in the Bible is covenant, not worth. Israel accepted the Torah and is bound by all of its commandments; the nations are held to a basic universal moral standard — Jewish tradition calls these the Noahide laws, going back to G-d's covenant with Noach after the flood. Different assignments, same G-d. The prophets even describe the nations ultimately coming to recognize G-d together with Israel — the Bible never writes the Gentiles out of the story.

(There is more on what "Gentile" means in plain everyday terms in the Common Questions below.)

Common Questions

What is the difference between Jews and Israelis? Nationality versus peoplehood. "Israeli" is a citizenship — about a quarter of Israeli citizens are not Jewish (most are Arab citizens), while nearly half the world's Jews live outside Israel entirely, most of them in the United States. A Jew in Brooklyn is not an Israeli; a Druze citizen of Haifa is not a Jew; the story of Israel and the story of the Jews overlap enormously but are not the same story.

What makes someone Jewish? In Orthodox law, a person is Jewish if their mother is Jewish (matrilineal descent) or if they undergo a valid Orthodox conversion. A Jewish father alone does not make someone Jewish according to Orthodox halacha.

Can you be half Jewish? In Orthodox law, no — you are either Jewish or not. If your mother is Jewish, you are fully Jewish regardless of your father's religion. If only your father is Jewish, you are not Jewish according to Orthodox halacha (though Reform Judaism counts patrilineal descent).

Can you stop being Jewish? According to Jewish law, once someone is Jewish (by birth or conversion), they remain Jewish permanently — even if they stop practicing or convert to another religion. A non-practicing Jew is still Jewish.

Are Jews Christians? No — Jews are not Christians. Judaism and Christianity are two distinct religions. Christianity began among first-century Jews but became a separate faith built on claims Judaism does not accept: that G-d took human form, and that the Mashiach has already come. Judaism teaches that G-d is an absolute unity who never becomes human, and that the covenant of the Torah remains fully in force — which is why Orthodox Jews do not believe in Jesus. The two faiths share the Hebrew Bible and much moral vocabulary, and respectful relations besides, but sharing roots does not make them one religion.

What race is a Jew? None — Jews are not a race. There are Jews of every skin color and appearance, because Jewishness is a matter of maternal descent or conversion, not physical traits. Anyone from any background can become fully Jewish through a valid conversion, which no racial definition would allow.

Can a DNA test tell you if you're Jewish? Not in the way that matters. A DNA test can show ancestry that is common among Jewish populations, and that can be a meaningful clue about your family history. But Jewish status in Jewish law has never depended on a test — it depends on a Jewish mother or a valid conversion. A convert with zero "Jewish DNA" is 100% Jewish, while someone with plenty of Jewish ancestry whose maternal line is not Jewish is not. If a result makes you curious, a rabbi who works with conversion and status questions can help you sort out what it means.

Who are the Gentiles? Simply everyone who is not Jewish. The word comes from the Latin for "nation," translating the Hebrew "goy," which literally means "nation" — the Torah even calls Israel itself a "goy." There is nothing insulting about the category: Judaism teaches that righteous people of all nations have a share in the World to Come, which is why Jews do not missionize. Non-Jews are not expected to become Jewish — though sincere converts are accepted after a serious process.

Is Judaism an ethnicity or a religion? Honestly, neither box fits — Judaism is the religion of a people, and the people come first. It cannot be just an ethnicity, because a person of any ancestry who completes a valid Orthodox conversion becomes fully Jewish — no ethnicity works that way. And it cannot be just a religion, because a Jew who never practices is still completely Jewish. The word that actually fits is peoplehood: a family with a covenant, which you enter by birth or by joining.

What is the Jewish religion called? The Jewish religion is called Judaism — in Hebrew, Yahadut. In observant communities you will often hear "Torah Judaism," or the warmer Yiddish word "Yiddishkeit," which covers the whole way of life, not just the beliefs. The people themselves are called Am Yisrael — the nation of Israel.