First cousin marriage is illegal in Mississippi under state law, which explicitly declares such unions incestuous and void from the outset. This prohibition stems directly from Mississippi Code § 93-1-1, reflecting longstanding concerns over genetic risks and social norms.
While more distant relatives like second cousins face no restrictions, first cousins risk nullification of any attempted marriage, even from other states.
Core Legal Prohibition
Mississippi Code § 93-1-1(1) states: “nor shall the children of brother or sister, or brothers and sisters intermarry being first cousins by blood.” This makes first cousin marriages automatically invalid, with no licensing possible in the state. The law covers blood relatives uniformly, including half-first cousins sharing one grandparent, and applies to both directions (male/female).
Such marriages carry no criminal penalty but void spousal rights like inheritance, alimony, or tax benefits. Out-of-state cousin weddings aren’t recognized, complicating residency issues like property or custody.
Allowed Relationships
Second cousins and beyond (sharing great-grandparents) can marry freely, as can first cousins once removed (e.g., parent-child of a cousin). Adopted cousins are permitted unless blood ties exist. No religious, genetic counseling, or age-based exceptions override the first-cousin ban.
Comparison Across States
Only 19 states allow first-cousin marriage; Southern states like MS align with bans.
Historical Context
Enacted in the early 20th century (roots in 1922 laws), the ban mirrors national trends against consanguinity for health reasons—first cousins share 12.5% DNA, raising recessive disorder risks by 3-4%. No 2025-2026 amendments; stable policy.
Practical Implications
Couples seeking licenses must prove non-prohibited kinship via affidavits or records. Clerks reject first cousins outright. Post-marriage challenges (e.g., divorce) treat unions as nonexistent, forcing separate legal actions. Children from such relationships retain legitimacy but lose automatic inheritance.
Enforcement and Myths
No jail time for marrying; focus is civil invalidation. Myths persist online, but circuit clerks enforce strictly. Common-law recognition doesn’t apply to prohibited degrees.
Alternatives and Advice
Distant cousins or adoptions work; genetic testing irrelevant. Consult clerks pre-application. For interstate moves, re-evaluate rights—MS prioritizes its code.
SOURCES:
- https://law.justia.com/codes/mississippi/title-93/chapter-1/section-93-1-1/
- https://law.justia.com/codes/mississippi/2020/title-93/chapter-1/section-93-1-1/
