Is Dating Siblings Legal in South Korea After the 2026 Regulatory Updates?

No, South Korea criminalizes sibling dating under the Criminal Act (Article 274), classifying it as incest with penalties up to 5 years imprisonment or fines up to ₩10 million. The Supreme Court has upheld this stance, citing public morality and genetic risks. Local family registries (호적, hojeok) further restrict recognition of such unions.


Key Regulations for Dating Siblings in South Korea

  • Criminal Act (형법) Article 274: Prohibits incestuous relationships, including sibling unions, with criminal liability for both parties.
  • Family Registry Act (가족관계등록법): Bars registration of sibling marriages, rendering them legally void even if performed abroad.
  • 2026 Compliance Shifts: The Ministry of Gender Equality and Family (여가부) is reviewing stricter enforcement mechanisms, including digital surveillance of familial relationships in public records.