Yes, cousin marriage is legal in Ireland under specific conditions, provided no other legal impediments exist. The Civil Registration Act 2004 and the Family Law Act 1995 govern eligibility, with no outright ban on first-cousin unions. However, the General Register Office (GRO) requires proof of non-consanguinity beyond the prohibited degrees, and medical advisories from the Health Service Executive (HSE) may influence parental consent for minors. Recent 2026 compliance guidance emphasizes genetic counseling for couples where either party is under 18, aligning with EU public health frameworks.
Key Regulations for Cousin Marriage in Ireland
- Prohibited Degrees: Marriages between lineal ancestors/descendants (e.g., parent-child) or siblings are void under the Family Law Act 1995. First-cousin unions are permissible but subject to GRO scrutiny.
- Age and Consent: Parties must be at least 18 (or 16 with parental consent under the Civil Registration Act 2004). The GRO may request additional documentation for cousin applicants under 18.
- Medical and Genetic Considerations: The HSE’s 2025 guidelines recommend genetic screening for first-cousin couples, particularly where family history indicates hereditary conditions. Non-compliance does not invalidate the marriage but may prompt further review.
The Department of Children, Equality, Disability, Integration and Youth (DCEDIY) monitors compliance, with 2026 legislative amendments tightening record-keeping for consanguineous marriages to enhance public health oversight. Failure to disclose genetic risks may result in administrative delays but does not constitute a criminal offense.