Country

Justice and public safety in South Korea

South Korea is a unitary, civil-law republic under its 1987 Constitution, with all justice functions national. It has two apex courts — a Supreme Court and a separate Constitutional Court — and a prosecution that sits under the executive. A 2020–2021 reform moved most investigation to the police, and an enacted 2025 restructuring, not yet in force, is to abolish the Prosecution Service in October 2026 and separate the power to investigate from the power to indict.

Fact-checkedSafety review clearedLast updated 27 July 2026Last reviewed 27 July 2026

Institutional facts on these pages were checked against their sources on 27 July 2026. Where a cited provision carries a scheduled change, the page states the date.

South Korea (대한민국, Daehanmin-guk) is a unitary parliamentary-presidential republic with a civil-law tradition, governed by the Constitution of 1948 as wholly revised in 1987 (the Sixth Republic). Its territory is a single indivisible unit (Article 3), and local self-government is confined to local administrative and welfare matters — so all four justice functions are national. Judges "rule independently according to their conscience and in conformity with the Constitution and law" (Article 103).

The system runs through national institutions: a three-tier ordinary judiciary under the Supreme Court, a separate Constitutional Court, the single Korean National Police Agency, the Prosecution Service, and the Korea Correctional Service. Two apex courts, concentrated constitutional review, and — for now — a prosecution under the Ministry of Justice.

Jurisdictions modelled

A territory can exist administratively without being a separate legal jurisdiction. This table records, for each modelled tier and territory, whether it has its own arrangement for a function, whether the function is organised nationally, or whether we have simply not researched it.

Functional scope of each modelled South Korea jurisdiction
Jurisdiction	Level	Courts	Prosecution	Policing
South Korea	country	own	own	own

unknown means not researched. It is never a synonym for none: an unresearched territory does not inherit the metropolitan arrangement.

What has not been researched

These areas have no page. That is a statement about our research, not about South Korea: each of these institutions exists, and we have simply not established enough from primary sources to write about it responsibly.

Forensic systemNot researched: The organisation of forensic science in South Korea (the National Forensic Service) has not been read to the standard required, and forensics is a safety-sensitive section where an under-sourced description is specifically forbidden.
Border and customsNot researched: Border and customs in South Korea involve the Korea Immigration Service, the Korea Customs Service and the Korea Coast Guard, and could not be researched to the standard required here without risking an inaccurate description of a security-adjacent function.
Institutional historyNot researched: South Korea's institutional history — the 1987 democratic transition and the Sixth Republic, the creation of the Constitutional Court, and the successive reforms of the prosecution — cannot be written responsibly from general knowledge and requires scholarly and archival sources not consulted here.
Institutional timelineNot researched: A timeline requires each milestone to carry its own verified source and date. The dated facts established in this pilot — the 1987 Constitution, the 2020–2021 investigation-power reform, and the 2025 restructuring effective in 2026 — are a start, but a responsible timeline needs primary sources for each milestone, which were not assembled here.

Uncertainty

What we could not establish

The placement of the Korean National Police Agency under the Ministry of the Interior and Safety, and the 2020–2021 investigation-power rebalance, are established from reform reporting and secondary reading rather than a fetched police organic law; described with that limit.
The National Human Rights Commission, the Anti-Corruption and Civil Rights Commission, and the Corruption Investigation Office for High-ranking Officials are named from secondary/tertiary reading, not fetched official pages; the court-administration point is from the U.S. Federal Judicial Center.
The 2025 restructuring rests on Korea Herald reporting; the primary gazette and the implementing statutes were not fetchable. The current arrangement is stated as in force until the effective date.
The forensic system, border and customs arrangements, and institutional history have not been researched and are not described.

Sources

Constitution of the Republic of Korea (1948, wholly revised 1987) — English translation
Comparative Constitutions Project (Constitute) · Legislation · 1987 · link verified 2026-07-27
The Comparative Constitutions Project (Constitute) English translation of the Constitution of the Republic of Korea (originally 1948, wholly revised in the ninth amendment of 1987, in force from 25 February 1988), read directly and re-confirmed. An UNOFFICIAL translation; the Korean text is authoritative. Supports Art. 3 (the territory is the Korean peninsula and its adjacent islands — a single indivisible unitary state); Art. 12 (warrants issued by a judge "upon the request of a prosecutor"); Art. 101 (judicial power vested in courts); Art. 103 ("Judges shall rule independently according to their conscience and in conformity with the Constitution and law"); Art. 106 (tenure — removal only by impeachment or criminal punishment); Art. 107 (a court doubting a statute's constitutionality refers the question to the Constitutional Court — concentrated review); Arts. 111–113 (the Constitutional Court's jurisdiction, nine adjudicators, and the six-vote requirement); and Arts. 117–118 (local self-government limited to local administrative/welfare matters, not justice).
Judiciaries Worldwide — Republic of Korea (U.S. Federal Judicial Center)
U.S. Federal Judicial Center (foreign-government reference on Korea) · Government publication · link verified 2026-07-27
The U.S. Federal Judicial Center's Judiciaries Worldwide profile of the Republic of Korea, read directly. A FOREIGN-GOVERNMENT reference (the research/education arm of the U.S. federal judiciary), named as such. Supports the three-tier ordinary court system (18 district courts → high courts → Supreme Court), the Supreme Court as court of final appeal with fourteen Justices including the Chief Justice, and that "the Constitutional Court is an independent entity and not part of Korea's three tier court system" with exclusive jurisdiction over constitutional matters; and that court administration runs through the National Court Administration, "under the jurisdiction of the Supreme Court", with authority "delegated by the Chief Justice" (i.e. no European-style external judicial council).