In Iran, marriage between first cousins is permitted under civil law aligned with Islamic regulations. Here is an overview of Iran’s laws regarding unions between biological first cousins.

Iranian Civil Law Allows Cousin Marriage

According to Iran’s Civil Code, marriage is allowed between biological first cousins without any prohibitions or limitations imposed. There are no civil regulations that bar first cousin marriage in Iran.

This legal allowance also extends to double first cousins, who share both sets of grandparents. Despite their closer degree of kinship, Iranian law does not prohibit double first cousins from marrying either.

Based on Shia Islamic Law Tradition

Iran’s civil law permitting cousin marriage is based on the country’s Shia Islamic law traditions and jurisprudence. Islam allows and encourages marriage between certain categories of cousins.

As a Shia majority country, Iran’s civil regulations conform to these religious rulings allowing cousin unions for both civil and religious marriage contracts.

Cultural Views on Cousin Marriage

In line with religious guidance, Iranian society generally favors cousin marriage. Surveys show 60-70% approval of first cousin unions among Iranians.

Marrying within families is culturally valued and seen as a way to reinforce social ties and keep wealth concentrated. Cousin couples face little social stigma in most communities.

Rationale Behind Iran’s Approach

By allowing cousin marriage in civil law, Iran’s legal framework aligns with and uplolds traditional Shia Islamic teachings.

Religious law and guidance shapes public attitudes allowing the practice. Legal, religious and cultural factors all permit cousin marriage in Iran.


In summary, Iranian civil law places no restrictions on marriage between biological first cousins based on the country’s Shia Islamic traditions. Societal attitudes are also favorable toward the practice overall. Cousin couples in Iran meet little resistance legally or culturally when marrying.