Is Cousin Marriage Legal in Vietnam After the 2026 Regulatory Updates?

Yes, cousin marriage is legally permitted in Vietnam under specific conditions. The Civil Code of 2015 and the 2014 Marriage and Family Law do not explicitly ban marriages between first cousins, but they impose restrictions to prevent genetic risks and uphold social norms. Local authorities, particularly district-level People’s Committees, retain discretion in approving such unions based on medical and familial assessments.


Key Regulations for Cousin Marriage in Vietnam

  • Medical Clearance Requirement: Couples must undergo genetic screening to assess potential hereditary risks. Approval hinges on results from provincial or district health departments, as mandated by the Ministry of Health’s 2020 Circular 15/TT-BYT.
  • Consent and Age Compliance: Both parties must be at least 18 (women) or 20 (men) years old, per the Civil Code. Consent must be voluntary, with no coercion or fraud, as enforced by local civil status registries.
  • Local Discretionary Approval: District-level People’s Committees (e.g., Hanoi’s Hoan Kiem or Ho Chi Minh City’s District 1 offices) evaluate applications, considering cultural traditions but prioritizing public health guidelines. Rejections may occur if genetic risks are deemed excessive.

Enforcement Context: Since 2023, Vietnam’s Ministry of Justice has tightened oversight, requiring registries to flag high-risk cousin marriages for further review. The 2026 draft amendments to the Marriage and Family Law may introduce stricter genetic testing protocols, aligning with WHO recommendations. Violations—such as falsified medical reports—can lead to annulment or administrative penalties under Decree 82/2020/ND-CP.