Interfaith marriage in Christianity

An interfaith marriage, also known as an interreligious marriage, is defined by Christian denominations as a marriage between a Christian and a non-Christian (e.g. a marriage between a Christian and a Jew, or a Muslim), whereas an interdenominational marriage is between members of two different Christian denominations, such as a Lutheran Christian wedding a Catholic Christian, for example.

Almost all Christian denominations permit interdenominational marriages, though with respect to interfaith marriage, many Christian denominations caution against it, citing verses of the Christian Bible that prohibit it such as 2 Corinthians 6:14–15, while certain Christian denominations have made allowances for interfaith marriage, which is referenced in 1 Corinthians 7:14–15, verses where Saint Paul addresses originally non-Christian couples in which one of the spouses converts to Christianity after the marriage between two originally non-Christian persons had already taken place. The early Christian Synod of Elvira prohibited interreligious marriage, teaching that "such marriages lead to the adultery of the soul."

Certain Christian denominations, such as the Allegheny Wesleyan Methodist Connection, discourage or prohibit interfaith marriage, basing this caution on passages from the Christian Bible, such as New Testament verses 2 Corinthians 6:14–15 and the Old Testament verses Deuteronomy 7:3 and Ezra 9–10. At the same time, for those already in an interfaith marriage or in the case where one party in a non-Christian couple converts to Christianity, they encourage couples to stay wed. Christian denominations, such as the Catholic Church and Presbyterian Church, offer guidelines with respect to interfaith marriages in which a baptized Christian wishes to marry a non-baptized person.