Is It Illegal to Marry Your Cousin in Missouri? Here's What the Law Says

It is illegal to marry your first cousin in Missouri. State law specifically prohibits marriages between first cousins, as well as other close relatives such as siblings, parents and children, and uncles and nieces or aunts and nephews.

There are no exceptions or special circumstances under which first cousins can legally marry in Missouri.

What About Other Cousin Relationships?

First cousins once removed (for example, your cousin’s child) and more distant relatives are allowed to marry in Missouri.
Second cousins and beyond are also permitted to marry under Missouri law.

Cohabitation and Sexual Relations

While first cousins cannot legally marry in Missouri, they are permitted to cohabitate and have sexual relations within the state.

Recognition of Out-of-State Marriages

Missouri has recognized first cousin marriages that were legally performed in other states where such unions are allowed.

However, this area of law can be complex, and recognition may not be automatic in every situation. It is advisable to consult with a legal professional if you have questions about the status of an out-of-state cousin marriage in Missouri.

Key Takeaways

First cousin marriage is illegal in Missouri.
First cousins once removed and more distant cousins can marry.
First cousin marriages performed in states where it is legal may be recognized in Missouri, but legal guidance is recommended.

If you are considering marriage to a cousin and reside in Missouri, be sure to review the specific relationship and, if needed, seek legal advice to clarify your situation.

Sources: