How to Become a Nigerian Citizen: Birth, Registration, Naturalization

There are three ways to become a Nigerian citizen: by birth, by registration, or by naturalization. Chapter III of the 1999 Constitution sets out each route, and the one available to you depends on your parentage, whether you’re married to a Nigerian, and how long you’ve lived in the country. Birth citizenship is automatic. Registration is open to foreign wives of Nigerian men and to people born abroad with a Nigerian grandparent. Naturalization is the long route for everyone else and requires fifteen years of residence.

Citizenship by Birth

Most Nigerians acquire citizenship automatically at birth under Section 25 of the Constitution. No application is required. You qualify if:

You were born in Nigeria before October 1, 1960, and either a parent or grandparent belonged to a community indigenous to Nigeria, provided at least one parent or grandparent was also born in Nigeria.
You were born in Nigeria after independence and either a parent or grandparent is a Nigerian citizen.
You were born outside Nigeria and either parent was a Nigerian citizen at the time of your birth.

Birth citizenship is the most secure form of Nigerian nationality. It cannot be revoked, and it lets you hold citizenship in another country without losing your Nigerian status.¹

Citizenship by Registration

Registration under Section 26 is the pathway for two specific groups of people with a direct family or marital tie to Nigeria:

Any woman who is or has been married to a Nigerian citizen.
Any person of full age, born outside Nigeria, whose grandparent is a Nigerian citizen.

Applicants in both categories must show good character, demonstrate a genuine intention to reside permanently in Nigeria, and take the Oath of Allegiance.²

The Marriage Route Runs One Way

The Constitution’s marriage-based registration route is not gender-neutral. A foreign woman married to a Nigerian man may register, but a foreign man married to a Nigerian woman may not. The constitutional text refers specifically to “any woman who is or has been married to a citizen of Nigeria,” and courts have read that language literally. A foreign husband’s only route is full naturalization, with its fifteen-year residency requirement.²

An amendment has been proposed. The House of Representatives has introduced HB. 1195, which would revise Section 26 to extend registration rights to all foreign spouses regardless of gender. As of early 2025, the bill was at committee stage and had not been passed.³

Citizenship by Naturalization

If you have no Nigerian parent or grandparent and don’t qualify through marriage-based registration, naturalization under Section 27 is the only route. It is demanding, and the President has broad discretion over approvals. Six conditions must all be met.

The Residency Requirement

You need either fifteen continuous years of residence in Nigeria immediately before applying, or at least twelve continuous months immediately before applying plus a total of at least fifteen years of residence within the preceding twenty years. There is no shortcut.¹

Character, Language, Contribution, and Community Acceptance

You must also satisfy the President that you are of good character, that you intend to make Nigeria your permanent home, and that you will make a useful contribution to the country. You need to be familiar with English or another language in active use in Nigeria, and you must take the Oath of Allegiance.

The community acceptance condition is unusual. The Governor of the state where you live or plan to live must certify that the local community accepts you and that you have assimilated into its way of life. The Constitution doesn’t specify how Governors verify this. In practice, expect local government inquiries and references from community members who know you.¹

Documents You’ll Need

The Ministry of Interior publishes separate checklists for registration and naturalization. Both share a core set of documents:

Passport-sized photographs
Birth certificate
The first five pages of your international passport, including the data page
Evidence of your means of livelihood
Tax clearance certificate
Residence permit

A woman applying through marriage also needs her marriage certificate. If her husband is deceased, she needs a letter of consent from his children or relatives.

Every application requires guarantors. For each guarantor, you must submit their completed guarantor form (downloaded from the Ministry portal), a passport photograph, a curriculum vitae, and a copy of a government-issued ID such as a driver’s license, international passport, or national ID card. Registration applicants also need a formal letter from each guarantor.⁴

The tax clearance certificate proves you’ve paid all assessed personal income tax for the three years immediately preceding the current year of assessment. You obtain it from the relevant state Internal Revenue Service. If you’re employed, your employer’s PAYE filings for those same three years must be current. Sort this out well before applying; it is a common source of delay.

How to Apply

The Ministry of Interior handles citizenship applications through its Citizenship and Business Department. The process starts online and finishes in person.

Submitting the Application

You begin on the Ministry’s eCitiBiz portal. Create an account, complete the application form, and upload your supporting documents. After finishing the online portion, submit physical copies of your documents to the Ministry of Interior in Abuja, or to the nearest Nigerian embassy or high commission if you’re abroad. Some forms must be downloaded from the portal, filled in, and returned in hard copy.⁴

Screening and Interview

Your application then goes through background checks by security agencies, including the State Security Service. The Ministry publishes no timeline for this stage, and most delays happen here. Expect a wait of many months.

Applications that advance move on to an interview. Officials will assess your eligibility, your familiarity with life in Nigeria, and the sincerity of your intention to remain. Naturalization interviews go deeper into the community acceptance and assimilation requirements.

Oath and Certificate

The final step is a formal ceremony where you take the Oath of Allegiance to the Federal Republic of Nigeria, as prescribed in the Seventh Schedule to the Constitution. You then receive your certificate of registration or naturalization. For naturalized citizens who hold another nationality, the date on this certificate starts the clock on the renunciation deadline described below.¹

Dual Citizenship Rules

Nigeria treats dual citizenship very differently depending on how you became a citizen. Section 28 is where the split lives.

If you are a Nigerian citizen by birth, you can hold citizenship in another country without losing your Nigerian status. If you became a citizen through registration or naturalization, you will automatically forfeit your Nigerian citizenship if you acquire or retain citizenship of another country, unless you are a citizen of that other country by birth.⁵

Timing matters, too. If you hold a foreign citizenship at the time you’re registered or naturalized as Nigerian, you must effectively renounce that foreign citizenship within five months, unless you hold it by birth. Missing that window puts your Nigerian citizenship at risk.⁵

Americans should note the tension this creates. Nigeria requires renunciation within five months for those who are not U.S. citizens by birth. The United States, for its part, generally does not treat voluntary foreign naturalization as automatic loss of U.S. citizenship, and it recognizes that Americans may hold dual nationality even though it does not encourage it. Anyone in this position should get advice from a lawyer familiar with both legal systems before applying.⁶

Denial and Revocation

Meeting every formal requirement doesn’t guarantee approval. The President has wide discretion over naturalization decisions, and rejections historically come without published reasons. The usual grounds for denial are failure to satisfy the residency timeline, character concerns raised in security screening, and inability to show acceptance by the local community.

Naturalized citizenship also isn’t permanent in the way birth citizenship is. The President may revoke a naturalized citizen’s citizenship if you:

Are convicted of a crime and sentenced to prison
Show disloyalty to Nigeria through actions or speech
Communicate with or assist an enemy during wartime
Acquire citizenship of another country in violation of the Section 28 rules above

Citizens by birth are not subject to these revocation provisions. Any citizen of full age can also voluntarily renounce Nigerian citizenship by making a formal declaration, which the President registers; the renunciation takes effect immediately once registered.¹

1
Constitution of the Federal Republic of Nigeria. Chapter 3 – Citizenship
2
Nigerian Constitution. Chapter 3 Section 26 – Citizenship by Registration
3
National Assembly Legislative Think-Tank Foundation. Proposed Amendment Aims to Grant Citizenship Rights to Foreign Spouses in Nigeria
4
Ministry of Interior. Citizenship Requirement
5
Nigerian Constitution. Chapter 3 Section 28 – Dual Citizenship
6
U.S. Department of State. 7 FAM 1100 Acquisition and Retention of U.S. Citizenship and Nationality