The topic of marrying a cousin is one that often raises questions and concerns, particularly regarding the legality and social acceptability of such unions. Each state in the U.S. has its own laws governing marriage, and in Washington, the question of whether it’s legal to marry your cousin has a straightforward answer: Yes, it is legal to marry your cousin in Washington. However, there are some important factors and restrictions to keep in mind when it comes to cousin marriages.
Washington State Laws on Cousin Marriages
Washington state does not have any laws that specifically prohibit marriage between cousins. The law allows first cousins to marry without any legal restrictions. There are no age or relationship degree limits for cousin marriages, and you do not need to obtain special permission or a waiver to marry your cousin. In essence, cousins can marry each other legally in Washington, just like any other couple.
Are There Any Restrictions or Exceptions?
While cousin marriages are legal in Washington, it’s important to note that the laws in other states may differ. Some states have stricter regulations or even outright bans on cousin marriages, so it’s important to be aware of the laws in the state where the marriage is taking place.
However, Washington does not impose restrictions based on the degree of cousin relationship, meaning first cousins, second cousins, and other extended cousins can legally marry. Unlike some other states, Washington does not require genetic testing or special permission for cousins to marry.
Genetic Considerations
While Washington permits cousin marriages, genetic risks are often a topic of concern. Marrying a cousin can increase the chances of genetic disorders in offspring because cousins share a portion of their genetic material. That said, the risk is relatively low compared to closer blood relatives such as siblings or parents.
It’s important to recognize that genetic counseling can help couples understand the risks associated with marriage and childbearing. Some couples may choose to undergo genetic testing or counseling before deciding to have children, but this is not required by law in Washington.
Legal and Social Considerations
Although cousin marriage is legal in Washington, it remains a controversial topic for some. There may be social or cultural stigma attached to marrying a cousin, particularly for those who believe that such marriages are inappropriate due to concerns over family dynamics or genetic risks. However, the state’s legal framework does not impose any additional requirements or prohibitions, and it recognizes the right of individuals to marry someone they choose, even if they are cousins.
It’s also important to note that while Washington allows cousin marriages, federal law does not prohibit such unions either. This means that couples married in Washington who later move to a different state can still have their marriage recognized by the federal government, provided the marriage is valid in the state where it took place.
In Washington, it is not illegal to marry your cousin. There are no laws preventing first cousins from marrying, and there are no specific restrictions or requirements beyond the standard marriage laws. While the state does not regulate genetic testing for cousin marriages, individuals who are concerned about potential genetic risks may choose to seek counseling or testing. As long as both parties are of legal age and meet other marriage requirements, cousin marriages are legally recognized in Washington.
Sources
[1] https://collincountymagazine.com/2025/07/20/is-it-illegal-to-marry-your-cousin-in-washington-heres-what-the-law-says/
[2] https://www.findlaw.com/state/washington-law/washington-annulment-and-prohibited-marriage-laws.html
[3] https://app.leg.wa.gov/rcw/default.aspx?cite=26.04&full=true
[4] https://app.leg.wa.gov/rcw/default.aspx?cite=26.04.020
[5] https://en.wikipedia.org/wiki/Cousin_marriage_law_in_the_United_States
