Illinois marriage laws strictly regulate unions between close relatives to protect public health and family structures. While marrying a first cousin is generally prohibited, specific exceptions exist under state statute. This article breaks down the rules, exceptions, and key considerations.
Prohibited Marriages Overview
Illinois statute 750 ILCS 5/212 bans marriages between first cousins, classifying them as prohibited degrees of consanguinity. This restriction aims to prevent genetic risks associated with close-kin reproduction, a concern rooted in historical and medical contexts. The law lists other forbidden unions, such as those with siblings, parents, aunts, uncles, nieces, and nephews, but focuses on first cousins under subsection (a)(4).
Exceptions for First Cousins
First cousin marriages become legal if both parties are 50 years or older, or if one provides a physician’s certification of permanent and irreversible sterility. The sterility certificate must be filed with the county clerk during the marriage license application, signed by a licensed physician. These conditions reflect Illinois’ balance between prohibition and limited allowances for non-procreative unions.
Second Cousins and Beyond
No prohibitions apply to second cousins or more distant relatives, making those marriages fully legal without exceptions. This distinction recognizes lower genetic risks in less closely related kin, aligning with practices in many states. Couples involving second cousins face no additional hurdles beyond standard marriage requirements.
Application Process Details
To marry under an exception, applicants submit the required proof when applying for a license at the county clerk’s office. Both parties must meet age (18 minimum, or parental consent for 16-17) and other general criteria, like not being currently married. Failure to qualify voids the marriage, potentially leading to legal invalidation.
Same-Sex Cousin Marriages
The same rules govern same-sex couples; first cousin unions require the age or sterility exceptions regardless of gender. Illinois legalized same-sex marriage in 2014, but consanguinity laws apply uniformly. This ensures consistency in prohibited relationships across all pairings.
Out-of-State Recognition Issues
Marriages valid elsewhere may not be recognized in Illinois if they violate local consanguinity rules. For residents, obtaining a license in another state doesn’t override Illinois prohibitions upon return. Couples should consult legal experts for interstate validity, especially for inheritance or divorce implications.
Historical and National Context
Cousin marriage was more common pre-Industrial Revolution but is now illegal in 31 states, with Illinois among those with strict limits. Nationally, about half of states allow first-cousin marriage outright, while others impose similar exceptions. Illinois’ approach prioritizes sterility or age to mitigate health concerns.
In summary, marrying your first cousin in Illinois is illegal unless you meet the 50+ age threshold or sterility certification—second cousins face no such barriers. Always verify with current statutes or a family law attorney, as laws can evolve.
SOURCES :
- https://quickcountry.com/ixp/711/p/you-can-legally-marry-your-cousin-in-illinois-in-this-weird-circumstance/
- https://theamm.org/marriage-laws/illinois
