In Judaism, interfaith marriage has historically been viewed with strong disapproval by Jewish leaders and remains a contentious issue within the Jewish community. According to Halakha (Jewish law), as derived from the Talmud, marriage between a Jew and a non-Jew is both prohibited and considered void under Jewish law.Kiddushin 68b The Haskalah influenced more diverse perspectives on interfaith marriage.

A 2020 survey conducted by the Pew Research Center in the United States reported that 42% of married American Jewish respondents had a non-Jewish spouse. Among those who married after 2010, the intermarriage rate was 61%, rising to 72% when excluding Orthodox Jews from the data.

In the Hebrew Bible The Hebrew Bible contains numerous accounts of interethnic marriages. Prominent figures, such as Abraham, Moses, and David, are described as taking non-Israelite women as wives or consorts. The books of Ezra–Nehemiah describe widespread intermarriage between Jews and Samaritans and, to a lesser extent, Philistines. Interfaith marriage, however, was widely condemned, as it was believed that such a union could result in the perversion or abandonment of the Israelite religion. Since the notion of these interethnic marriages was inextricably tied to the potential mixing of Israelite and foreign religions, the biblical text uses the condition of having "foreign" spouses to illustrate the concerns surrounding interfaith unions.Response of Rabbi Eliezer Zalmanov 08/19/2022

The Hebrew Bible contains numerous laws restricting or forbidding interethnic and, by extension, interfaith marriages. Ancient Israelites were prohibited from marrying individuals from the Seven Nations residing within the Land of Israel.Deuteronomy 20:15-17; Joshua 9:1-2; Joshua 24:12 Israelites were permitted to marry foreign female prisoners of war under strict conditions: the women could not be from cities within the Land of Israel, as these might have been inhabited by the forbidden nations. Additionally, the captive woman was to be a virgin and not allowed to have any sexual relations with her captor until after she had mourned her absent parents for a full month.Numbers 31:17-18; Judges 21:9-21 If a soldier became tired of her, he was to give her freedom if she asked for it; he was not to sell her or enslave her since this was a marriage under compulsion.Deuteronomy 21:10-14Woman captured in War Aish TorahThe Torah position on Rape

The Torah posits that a Jewish soldier should not marry a captive non-Jewish woman as a wife because the son would rebel against his father; this would later happen to King David and Absalom.Woman captured in warAsk the Rabbi query - Response of Rabbi Eliezer Zalmanov for Chabad.org 22 August 2022

The crisis of the Babylonian exile renewed concerns for maintaining the "purity" of the ethnic Israelite population. Ezra is described as urging his fellow Jews to separate from their "foreign" wives and children.Intermarriage Jewish Encyclopedia Under his tutelage, intermarriage came to be highly discouraged.Ezra Chapters 9 and 10

Later laws and rulings In the first century CE, Jewish marriage customs seem to have generally favored endogamy, and conversion before marriage was often expected in cases of intermarriage. This practice was upheld by members of the Herodian dynasty, who insisted that their spouses convert. The Roman historian Tacitus, in Histories (c. 100–110 CE), describes Jews as maintaining social separation, stating that they "sit apart at meals, they sleep apart, and [...] abstain from intercourse with foreign women".Tacitus, Histories, 5.5 Many Jews likely viewed intermarriage with non-Jews with distaste, asserting the importance of conversion in maintaining group boundaries. The insistence on conversion was not a missionary effort, but a means of preserving Jewish identity, as post-marital conversion—allowed in Christian practice—was not customary in Judaism.

The Talmud asserts that a marriage between a Jew and a non-Jew is prohibited and does not constitute a valid marriage under Jewish law unless the non-Jew converts to Judaism. From biblical times through the Middle Ages, exogamy—marriage outside the Jewish community—was common, as was conversion to Judaism.

In medieval Europe, Christian rulers prohibited marriages between Jews and Christians, often under penalty of death.Codex Theodosianus, 16:8, 6Heinrich Grätz, Geschichte der Juden (=History of the Jews) 4:363; 5:359; 7;27Leopold Löw, Gesammelte Werke, 2:176

Over time, these restrictions were lifted in many regions, and interfaith marriages involving Jews became more frequent. In 1236, Moses ben Jacob of Coucy induced Jews bespoused by such marriages to dissolve them.Moses of Coucy, Sefer Mitzvot ha-Gadol, 112 In 1807, Napoleon's Grand Sanhedrin declared these marriages civilly valid, though not recognized under Jewish law, and stated that they should not be treated as anathema. This stance was extended in 1844 by the Rabbinical Conference of Brunswick to include any adherent of a monotheistic religion, but forbade marriages involving those who lived in states where children of the marriage could not be raised Jewish. The conference was controversialJewish Encyclopedia, "Conferences, Rabbinical" and one member later became an opponent of intermarriage.Ludwig Philippson, Israelitische Religionslehre (1865), 3:350

Traditional Judaism does not consider marriages between a Jew by birth and a convert as interfaith marriages.Berakhot 28aRabbi Yosef Karo, Shulchan Aruch III:4:10 Classical rabbinic interpretations maintain that biblical intermarriages, such as that of Joseph and Asenath or Ruth to Boaz, occurred after the non-Israelite partner's conversion.Genesis Rabbah, 65 Opinions vary on whether certain groups, such as Canaanites, were eligible for marriage even after conversion; this did not necessarily apply to their children.Maimonides, Mishneh Torah, Sanctity, Laws of Prohibited Relations, 12:22 and Maggid Mashnah ad. loc. The Shulchan Aruch and its commentaries bring various opinions as to whether intermarriage is a Torah prohibition and when the prohibition is rabbinic.III:16:2

Foundlings—children abandoned without identifiable parents—were generally classified as non-Jews concerning intermarriage if found in areas with at least one non-Jewish resident. This contrasted with other areas of Jewish law that classified foundlings as Jewish if the majority of the people were Jewish in the area in which they were found. If a child's mother was known, but not the father, the child was treated as a foundling, unless the mother claimed that the child was an Israelite.Ketubot 13aKiddushin 74aKetubot (Palestinian Talmud only) 1:9

Marriages between Jews and "German-blooded" people were banned in Nazi Germany under the Nuremberg Laws.

Modern attitudes The Talmud and subsequent classical sources of Jewish law state that the institution of Jewish marriage, kiddushin, can only be effected between Jews.

A 2013 Pew Research Center study found that children of intermarriages were more likely to intermarry themselves and to identify as religiously unaffiliated. Younger generations of intermarried families showed a higher rate of Jewish identification compared to older generations. The study noted that the long-term effects of intermarriage on Jewish identity remain uncertain.

Orthodox Judaism

Orthodox Judaism adheres strictly to historic Jewish attitudes to intermarriage, refusing to accept intermarriages as valid or legitimate, along with strictly forbidding sexual intercourse with a member of a different faith. Orthodox rabbis do not officiate at interfaith weddings and generally avoid facilitating them, also try to avoid assisting them in other ways. Secular intermarriage is seen as apostasy, and intermarried individuals are effectively cut off from most Orthodox communities. Outreach efforts by some groups, such as Chabad and Modern Orthodox Jews, do reach out to intermarried Jews, particularly target intermarried Jewish women, since Orthodox law considers the children of Jewish women to be Jewish regardless of the father's status.In laws and Shabbat Law Orthodox teachings view marriage between a Jewish man and woman as a reunion of two halves of the same soul, making relationships with non-Jews a disgrace.On Intermarriage Rabbi Eliezer Shemtov Some Orthodox families observe shiva (mourning rites) for relatives who marry outside the faith, symbolically mourning the potential loss of future generations who may not be raised as Jewish.Response of Rabbi Eliezer Zalmanov 08/01/2019

Intermarriage is controversially referred to as the "Silent Holocaust" () in some Orthodox circles. Communal leaders, such as Rabbi Ephraim Buchwald of the National Jewish Outreach Program, popularized the phrase. Buchwald claimed in 1992 that the Jewish community would not be recognizable in 25 to 30 years.

Masorti Judaism Masorti Judaism does not sanction or recognize the Jewish legal validity of intermarriage but encourages the inclusion of non-Jewish spouses within Jewish families in hopes of fostering eventual conversion. The Rabbinical Assembly's Standards of Rabbinic Practice prohibit Conservative rabbis from officiating at intermarriages and, until 2018, also forbade them from attending such ceremonies. In 1995 the Leadership Council of Conservative Judaism published the following statement on intermarriage: In the past, intermarriage... was viewed as an act of rebellion, a rejection of Judaism. Jews who intermarried were essentially excommunicated. But now, intermarriage is often the result of living in an open society... If our children end up marrying non-Jews, we should not reject them. We should continue to give our love and by that retain a measure of influence in their lives, Jewishly and otherwise. Life consists of constant growth and our adult children may yet reach a stage when Judaism has new meaning for them. However, the marriage between a Jew and non-Jew is not a celebration for the Jewish community.....Leadership Council of Conservative Judaism, Statement on Intermarriage, Adopted on 7 March 1995

Progressive Judaism In the United States, Reform and Reconstructionist Judaism generally do not regard Jewish law as binding.

A 1985 survey found that over 87% of Reconstructionist rabbis were willing to officiate at interfaith marriages.Survey of the American Rabbinate, The Jewish Outreach Institute, (retrieved 6 May 2009) In 2015, the Reconstructionist Rabbinical College became the first Jewish seminary to allow rabbis in interfaith relationships.

The Central Conference of American Rabbis consistently opposed intermarriage until the 1980s.Reform Judaism and Mixed Marriage CCAR Responsa (Vol. XC, 1980, pp. 86–102), American Reform Responsa 146.Rabbi Officiating at a Mixed Marriage CCAR Responsa (Vol. XCII, 1982, pp. 213–215), American Reform Responsa 149.Prayer for Couple Contemplating Intermarriage CCAR Responsa (1979), American Reform Responsa 147. By 2003, at least 50% of Reform rabbis were willing to perform interfaith ceremonies.Summary of Rabbinic Center for Research and Counseling 2003 Survey, Irwin H. Fishbein, Rabbi, D. Min., Rabbinic Center for Research and Counseling, (retrieved 6 May 2009) Some Reform congregations, including New York City’s Central Synagogue, conduct interfaith marriages to promote Jewish continuity, with the aim of encouraging non-Jewish spouses to convert. In 2024, Hebrew Union College, the seminary of the Reform movement, announced a decision to rescind the requirement that the partners of students in long term committed relationships be Jewish.

Humanistic Judaism considers intermarriage a "positive consequence of a free and open society". The Society for Humanistic Judaism advocates welcoming intermarried families as an opportunity to welcome non-Jews into the Jewish community.

Prevalence

2013 Pew Research poll