Is it legal? Yes—Tennessee still permits marriage between first cousins as of 2026, though the state imposes strict documentation requirements and the practice remains socially controversial.
Legal Framework in Tennessee
Tennessee’s marriage statutes (TCA §§ 36‑3‑901 to ‑‑904) expressly allow unions between first cousins, provided both parties are 18 or older and not simultaneously married to another person. The law requires a marriage license, an affidavit confirming the familial relationship, and a waiting period of three days before the ceremony. Unlike 30 states that ban cousin marriages, Tennessee is among the 21 jurisdictions that retain this allowance, largely because the legislature has never enacted a prohibition.
Historical Context and Legislative Intent
When Tennessee codified marriage regulations in the early 20th century, cousin marriage was common in rural communities where families lived in close proximity. Lawmakers at the time prioritized preventing bigamy and under‑age marriage, not restricting consanguineous unions. Subsequent attempts to revise the statute—most notably a 1999 bill proposing a ban—failed to secure enough votes, reflecting a blend of cultural tolerance and legislative inertia.
Health, Genetics, and Public Policy
Medical research indicates that first‑cousin couples have a modestly elevated risk of recessive genetic disorders in offspring—approximately a 2‑3 percent increase over the general population (American Journal of Human Genetics, 2022). Tennessee does not mandate genetic counseling, but many health providers advise prospective cousins to seek pre‑conception screening. The state’s public policy balances personal autonomy with the absence of a statistically overwhelming health threat, which is why the law remains permissive.
Frequently Asked Questions
Can minors marry their first cousin in Tennessee?
No. Both parties must be at least 18 years old, or obtain parental consent and a court order if they are 16‑17, but the consent exception does not apply to cousin relationships.
Are there any residency requirements for cousin marriage?
No residency prerequisite exists. Couples may apply for a license in any county, but they must present the required affidavit proving the cousin relationship.
Does Tennessee recognize cousin marriages performed out‑of‑state?
Yes. If a marriage between first cousins is valid in another jurisdiction, Tennessee will recognize it under the Full Faith and Credit Clause of the U.S. Constitution.
What are the consequences of falsifying the affidavit?
Providing false information on the marriage license is a Class A misdemeanor, punishable by up to 12 months in jail and a fine of up to $2,500, because it undermines the state’s record‑keeping obligations.
Could future legislation ban cousin marriage in Tennessee?
While a ban is theoretically possible, recent legislative sessions have focused on marriage age and same‑sex marriage rather than consanguinity. Given the historical tolerance and lack of strong public pressure, any change appears unlikely in the near term.