Is It Illegal to Marry Your Cousin in Louisiana? Here’s What the Law Says

The concept of marrying a cousin may strike some as strange or taboo, yet it has been historically practiced in many cultures around the world. In the United States, the legality of cousin marriages varies from state to state. Some states have clear bans on it, while others permit the practice under certain conditions. Louisiana sits squarely in the latter category.

History and Prevalence of Cousin Marriage

  • Throughout history, cousin marriages have occurred with varying degrees of acceptance. Reasons include strengthening family ties, keeping property within a family, and political alliances.
  • Famous historical figures who wed their cousins include Charles Darwin, Albert Einstein, and Edgar Allan Poe.
  • The prevalence of cousin marriage has declined in Western societies in recent times, though it remains common in some parts of the world, particularly the Middle East, South Asia, and parts of Africa.

Louisiana Law on Cousin Marriages

  • Louisiana is one of several US states that allow marriage between first cousins.
  • Louisiana Civil Code Article 90 specifically states that marriages between first cousins are permitted.

Requirements and Restrictions

  • Age: Both partners must be of legal age to marry in Louisiana (generally 18, with exceptions for younger individuals under specific circumstances).
  • Double Cousins: Louisiana law specifically permits marriage between double cousins. Double cousins share both sets of grandparents.

Genetic Counseling Considerations

  • While first-cousin marriages are not inherently high-risk, there is a slightly increased chance of offspring inheriting recessive genetic disorders compared to unrelated couples.
  • Couples considering a first-cousin marriage may wish to seek pre-marital genetic counseling to understand their individual risks and make informed decisions.
  • Genetic testing and screenings can help reveal potential recessive genes within a family and assess the risk for children.
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Cultural and Religious Perceptions

  • Perspectives on cousin marriage vary significantly across cultures and religions.
  • Some cultures may view cousin marriage favorably or even prefer it.
  • Some religions may have specific rulings or views on marriage between cousins. It’s important for couples to consider their own cultural and religious backgrounds when making these decisions.

Arguments For and Against Cousin Marriage

Arguments in Favor

  • Strengthened Family Bonds: Advocates argue cousin marriage can strengthen family ties and keep family traditions alive.
  • Cultural and Religious Acceptance: In some communities, cousin marriage is socially and culturally acceptable.
  • Personal Choice: Supporters emphasize the right of individuals to choose their partners without excessive government restrictions.

Arguments Against

  • Increased Genetic Risk: Opponents cite the slightly elevated risk of genetic disorders for offspring of cousin marriages.
  • Social Stigma: In some societies, cousin marriage carries a stigma, which could affect the couple and their children.
  • Ethical Concerns: Some individuals have moral objections to sibling-like relatives marrying.

Alternatives to First-Cousin Marriage

  • Second Cousins or Further Removed: Marrying more distant cousins lowers potential genetic risks.
  • Unrelated Partners: Choosing a partner outside of your immediate family removes potential genetic concerns and avoids potential social stigma.


The legality of cousin marriages sparks an ongoing debate with social, ethical, and medical dimensions. While Louisiana law permits first-cousin couples to marry, it’s essential to weigh all factors before making a decision. Consider cultural norms, religious views, potential genetic risks, and your personal values. Genetic counseling can provide valuable guidance for those contemplating cousin marriage. Ultimately, the right to marry is a personal choice, and couples should make informed decisions that best suit their circumstances.

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