Is It Illegal to Marry Your Cousin in Washington in 2025? Here’s What the Law Says

Marriage laws vary widely across the United States, with each state crafting its own regulations around who may marry whom. One particularly complex and often misunderstood topic concerns the legality of marrying a cousin. In some states, cousin marriage is entirely legal and socially accepted, while in others it is prohibited or restricted. For residents of Washington state and those curious about marriage laws there as of 2025, understanding the specifics around cousin marriage can clarify common misconceptions.

This article delves deeply into the legal stance on cousin marriage in Washington in 2025, exploring the relevant statutes, how Washington compares with other states, and some key facts and statistics about cousin marriage trends. Alongside, we highlight the broader social and legal context surrounding this topic to provide a comprehensive guide for anyone seeking clarity on whether it is illegal to marry your cousin in the Evergreen State.

Understanding Cousin Marriage: General Overview

Before diving into Washington’s specific laws, it is important to understand what cousin marriage entails and why states regulate it differently:

What is Cousin Marriage?

Cousin marriage most commonly refers to unions between first cousins, meaning individuals who share a set of grandparents. In some cases, laws also address marriages between cousins once removed or more distant cousins. The main concern historically has been the potential genetic risks for offspring and societal norms around consanguinity (blood relation).

Legal Variance Across the U.S.

Marrying a cousin is legal in several states like California, New York, and parts of the South. Other states outright prohibit it, often citing health, genetic, or cultural reasons. There are also states that allow cousin marriage with conditions, such as age limits or infertility status of the couple.

This patchwork of laws reflects diverse cultural attitudes toward cousin marriage and differing assessments of associated risks. While some prohibit it as incestuous, others view it as a private choice with manageable risks.

Legal Status of Cousin Marriage in Washington in 2025

What Washington State Law Says

Contrary to some misconceptions, Washington state does prohibit marriage between first cousins. The state’s family and domestic relations code clearly outlines prohibited marriages, which includes marriage between persons closer than second cousins. This means that first cousins cannot legally marry in the state of Washington.

The Revised Code of Washington states that individuals related as siblings, children, grandparents, aunts, uncles, nieces, or nephews cannot marry. It also prohibits marriages between persons closer in blood relationship than second cousins. Therefore, first cousin marriages fall under this prohibition, as first cousins share grandparents.

Implications of the Law

The relevance of this law means:

• Couples who are first cousins seeking to marry in Washington will not be able to obtain a valid marriage license within the state.

• Any marriage between first cousins performed within Washington would be considered illegally contracted and void.

• However, if first cousins were legally married in another state where such unions are permitted, Washington might recognize that marriage as valid under certain conditions, though this recognition can be complex and case-dependent.

Related Restrictions

Beyond cousin relationships, Washington prohibits marriage between closer family members, including siblings and direct descendants, which aligns with most states’ views on consanguinity laws.

Comparing Washington to Other U.S. States

Washington is among a majority of states that prohibit first cousin marriages. To give context:

• About half of U.S. states prohibit cousin marriage outright.

• Some states, like California and New York, allow it with no restrictions.

• Others allow it under specific conditions, such as age or infertility.

• A minority criminalize sexual relations or penalize cousin marriages more harshly.

Washington’s stance places it in the group of states with stricter laws as of 2025. This is reflective of the broader Pacific Northwest’s generally conservative approach to marriage between close relatives.

Common Myths and Realities About Cousin Marriage

Myth: Cousin Marriage is Legal in Washington

A persistent misunderstanding is that Washington allows cousin marriage. This may stem from confusion with other states or outdated information. The law clearly prohibits it, and residents must follow these statutes to avoid legal difficulties.

Myth: Cousin Marriages Are Illegal Everywhere

In reality, many states permit cousin marriage, making Washington part of a split system where legality depends on geographic location.

The Genetics Argument

One common rationale against cousin marriage is potential genetic risks to children. While there is a slightly increased risk of recessive genetic disorders in offspring from cousin marriages, modern genetic counseling and testing can mitigate many concerns. Some states have factored this consideration into allowing restricted cousin marriages, but Washington opts for the broader prohibition.

Social Attitudes and Cultural Context in Washington

Washington, home to cities like Seattle, Spokane, Tacoma, and Olympia, is known for progressive social policies in many areas, yet cousin marriage remains culturally sensitive. This could be due to historical norms, health risk concerns, and the legal framework set over decades.

Cultural diversity in Washington brings contrasting views. Some ethnic communities traditionally accept cousin marriage; others view it negatively. Nevertheless, residents in the state must abide by the law regardless of cultural background.

What Happens if Cousins Marry Illegally in Washington?

If two first cousins marry in Washington despite the prohibition, several legal consequences ensue:

• Their marriage is legally void and will not be recognized by the state.

• They may face difficulties in accessing spousal rights such as inheritance, health decisions, and tax benefits.

• There could be potential civil or criminal implications depending on circumstances, though prosecution for cousin marriage itself is rare.

• The couple may need legal advice to understand how to protect themselves, especially if moving from a state where their marriage was legal.

Alternatives and Considerations for Cousins Wishing to Marry

For cousins in Washington seriously considering marriage, possible alternatives include:

• Marrying in a state where cousin marriage is legal: Some couples choose to marry in states like California or New York where cousin marriage is permitted. However, they should verify if Washington will recognize such marriages when returning home.

• Legal consultation: Understanding the full implications and future legal standing within Washington is critical.

• Genetic counseling: Even where not required by law, seeking genetic counseling is prudent for prospective cousin couples to understand health risks and options.

Conclusion

As of 2025, it is illegal to marry your first cousin in Washington state. The law explicitly prohibits marriages between persons related more closely than second cousins, making cousin marriage invalid in the eyes of Washington’s legal system. While states vary across the U.S., Washington joins the majority with a strict approach to cousin marriage.

Anyone in Washington considering marriage to a cousin should be well-informed about the legal landscape, social implications, and potential alternatives, including marrying in a different state or pursuing genetic counseling. With increasing awareness and evolving perspectives nationwide, the conversation around cousin marriage continues, but current laws in Washington clearly disallow it.

Understanding one’s legal rights and obligations before making such a significant commitment ensures compliance and protects both parties in their personal and legal lives. Whether living in Seattle, Spokane, Tacoma, or elsewhere in Washington, residents must adhere to these laws in 2025.