Pathway

South Korean Citizenship After Residence

South Korea Citizenship

Updated October 8, 2026

Pathway overview

At a glance

You can apply to become Korean through a qualifying residence, family, marriage, or special category. The general route requires five continuous years and a status allowing permanent residence, plus the other citizenship checks.

Language and knowledge: Korean-language ability and knowledge of Korean customs and society are normally required
General residence rule: At least five continuous years and a status allowing permanent residence
General age rule: 19 or older

Summary

South Korea’s naturalization process allows eligible foreign residents to apply for citizenship, subject to the conditions of their legal category. The applicant must fit a legal category and pass the requirements that apply to it, which can include residence, permanent-residence status, age, good conduct, livelihood, Korean language and society knowledge, and national-security review.

The general route needs at least five continuous years of legal residence and a status that allows permanent residence. Five years alone does not make you a citizen.

Eligibility

General naturalization

You normally need all of the following:

At least five continuous years of lawful residence and a status that allows permanent residence.
Adulthood under Korean civil law, currently age 19 or older.
Good conduct and compliance with the law.
A way to support yourself through your assets or skills, or family living with you.
Korean-language ability and understanding of Korean customs and society.
A Ministry of Justice decision that approval would not harm national security, public order, or public welfare.

Family connections with a shorter residence rule

The law calls this facilitated naturalization. The general family-based version normally needs at least three continuous years in Korea and one of these connections: a parent who is or was Korean; birth in Korea to a parent also born there; or adoption by a Korean citizen when you were already an adult.

Marriage to a Korean citizen

If you remain married to a Korean citizen, you can generally use either two continuous years of residence in Korea during the marriage, or at least three years of marriage plus one continuous year in Korea.

Limited rules also cover some applicants whose marriage ended because of death, disappearance, or another reason not attributable to them, and some people raising a minor child from the marriage. These require evidence and are not blanket exceptions.

Special naturalization

This can cover someone with a currently Korean parent, except an adult adoptee, or someone formally recognized for exceptional merit or talent likely to benefit Korea. Merit and talent cases need the required recommendation and Nationality Deliberation Committee process; a strong career alone is not enough.

Assessment and interview

Applicants normally complete an assessment and interview. Exemptions can depend on age, recent assessment results, special merit or talent, completion of the Korea Immigration and Integration Program (KIIP), or another accepted reason.

Completing the relevant KIIP nationality course can satisfy or waive parts of the process. Merely planning to take it does not.

Applying to become Korean

Choose the correct citizenship category Check the residence and family conditions for your situation.
Prepare and complete the review Provide records and meet the applicable assessment and interview requirements.
Take the oath and receive the certificate If approved Complete nationality and registration steps on time.

Residence, marriage, and course completion do not guarantee approval. Plan the treatment of your other nationality before filing.

What This Route Allows

After approval, you acquire Korean nationality when you take the required national oath and receive the naturalization certificate. You can then complete family and resident registration and apply for Korean identity and passport documents.

A citizen no longer needs immigration permission to live or work in Korea. Citizenship also carries civic and legal duties.

Your other nationality

The general rule requires renouncing another nationality within one year after becoming Korean. Defined applicants may instead pledge not to exercise that foreign nationality in Korea. These include some marriage applicants who remain married, special-merit or outstanding-talent cases, and people unable to complete renunciation because of foreign law.

This option is not available to everyone. Confirm the rule for your category and the other country’s consequences before applying.

What This Route Is Not

Citizenship is not automatic after marriage, five years of residence, or passing KIIP. Your exact category, residence history, conduct, support, language, assessment, and security review still matter.

If you already became Korean at birth, you need nationality confirmation and registration instead. Former Korean nationals seeking citizenship again normally use a separate restoration process, which also has restrictions, including military-evasion concerns.

Next Steps

Identify the general, family-based, marriage, or special category that fits your circumstances.
Confirm its residence and status requirements and collect the relevant family and immigration records.
Gather tax, work or asset, and good-conduct evidence.
Check the assessment and interview requirements, using Soci-Net to register for KIIP or an assessment where appropriate.
Ask the local immigration office for the category’s current document and certification checklist.
Confirm whether to renounce your other nationality or use an allowed pledge not to exercise it in Korea.
If approved, complete the oath, certificate, registration, and document steps within the required periods.