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Dual Citizenship: Yes Europe

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Ireland

Last Updated: 2026-03-31

Official Portal: Department of Justice — Irish Citizenship

Embassy Finder: Irish Embassies and Consulates

Quick Facts

CategoryDetails
Residency for naturalization5 years reckonable residence out of the previous 9 years, including 1 continuous year immediately before application
Language requirementNone (English and Irish are official languages; no language test for naturalization)
Civics testNone
Processing time12—23 months (significant backlogs; Ministerial discretion applies)
Naturalization feeEUR 175 application fee + EUR 950 certification fee (adults); EUR 200 certification fee (minors/widowed spouses of Irish citizens)
Dual citizenshipFully permitted — no restrictions
Citizenship by birth in IrelandConditional since 2005; at least one parent must be an Irish or British citizen, or have 3 years lawful residence. Unrestricted jus soli applied before 1 January 2005.
Citizenship by descentAutomatic for children with at least one Irish citizen parent; grandchildren may register via the Foreign Births Register
Governing lawIrish Nationality and Citizenship Act 1956 (as amended, most recently by the Irish Nationality and Citizenship (Amendment) Act 2004)

Dual Citizenship

Ireland fully permits dual and multiple citizenship. There is no requirement to renounce any existing nationality when naturalizing as an Irish citizen, and Irish citizens who acquire another nationality do not lose their Irish citizenship.

This has been a consistent feature of Irish nationality law. Unlike many European countries that historically required renunciation, Ireland has never imposed such a condition. The Irish Nationality and Citizenship Act 1956, as amended, contains no provision for loss of citizenship upon voluntary acquisition of a foreign nationality.

This policy makes Ireland one of the most dual-citizenship-friendly countries in Europe and has particular significance for the Irish diaspora, estimated at over 70 million people worldwide.

Acquisition of Nationality

By Birth (Jus Soli)

Ireland’s jus soli provisions are deeply intertwined with the Good Friday Agreement (1998) and the subsequent 2004 constitutional referendum.

Pre-2005 rule: Every person born on the island of Ireland (including Northern Ireland) was entitled to Irish citizenship by birth. This was an unrestricted jus soli right enshrined in Article 2 of the Constitution following the Good Friday Agreement, which recognized the “birthright of all the people of Northern Ireland to identify themselves and be accepted as Irish.”

The 2004 Referendum and Amendment: Following concerns about “citizenship tourism,” the Irish electorate approved the Twenty-seventh Amendment of the Constitution (79.8% in favor) on 11 June 2004. This amended Article 9 to allow the Oireachtas (parliament) to regulate birth citizenship by law.

Current rule (since 1 January 2005): A person born in Ireland acquires Irish citizenship at birth only if, at the time of birth, at least one parent:

  1. Is an Irish citizen (or entitled to be), OR
  2. Is a British citizen, OR
  3. Is a person entitled to reside in Ireland or Northern Ireland without restriction, OR
  4. Has been lawfully resident in Ireland for 3 out of the 4 years immediately preceding the child’s birth (certain residences excluded: asylum seekers, students, persons on temporary permissions).

Northern Ireland: Under the Good Friday Agreement, persons born in Northern Ireland are entitled to identify as Irish, British, or both. They may claim Irish citizenship by birth regardless of the 2004 amendment, provided at least one parent was an Irish or British citizen or otherwise entitled to Irish citizenship.

By Descent (Jus Sanguinis)

Irish citizenship by descent operates on a generational basis:

First generation born abroad (Section 7): A person born outside Ireland to a parent who was born in Ireland is automatically an Irish citizen from birth. No registration is required, though obtaining documentation (passport) requires providing evidence of the parent’s birth in Ireland.

Second generation born abroad (Section 27): A person born outside Ireland to a parent who was also born outside Ireland (but whose grandparent was born in Ireland) may claim Irish citizenship by registering on the Foreign Births Register (FBR) maintained by the Department of Foreign Affairs.

  • Registration on the FBR confers citizenship from the date of registration, not from birth.
  • The registered person can then transmit citizenship to their own children born after the date of registration.
  • Fee: EUR 278 (adults), EUR 153 (minors).

Third and subsequent generations: Citizenship can continue to be transmitted indefinitely, but each generation born abroad must register on the FBR before the birth of the next generation for citizenship to pass on.

By Adoption

A child adopted under an adoption order recognized by Irish law acquires Irish citizenship if:

  • The adoptive parent (or one of the adoptive parents) is an Irish citizen, AND
  • The adoption is effected under the Adoption Act 2010 or is recognized as an intercountry adoption under the Hague Convention.

Citizenship is acquired from the date of the adoption order.

By Marriage

Ireland does not grant automatic citizenship through marriage. However, spouses and civil partners of Irish citizens benefit from reduced requirements for naturalization.

Requirements for spousal naturalization (Section 15A):

  • The applicant must be married to, or in a civil partnership with, an Irish citizen for at least 3 years.
  • The couple must be living together in a genuine and subsisting relationship.
  • The applicant must have 3 years reckonable residence out of the previous 5 years, including 1 continuous year immediately before the application.
  • Good character requirement.
  • Intention to continue residing in Ireland after naturalization.
  • Declaration of fidelity to the nation and loyalty to the State.

Note: The Minister for Justice retains absolute discretion to grant or refuse any naturalization application, even where all statutory conditions are met.

By Naturalization (Residency)

Standard pathway (Section 15, Irish Nationality and Citizenship Act 1956, as amended):

RequirementDetails
Lawful residence5 years reckonable residence out of the previous 9 years
Continuous residence1 continuous year immediately preceding the application
Age18 or over (minors through parental application)
Good characterNo serious criminal record; Garda (police) vetting conducted
Intention to resideMust intend to continue residing in Ireland
DeclarationDeclaration of fidelity to the Irish nation and loyalty to the State, made at a citizenship ceremony
Financial self-sufficiencyNot an explicit statutory requirement, but financial circumstances are considered
LanguageNo language test required
Application feeEUR 175
Certification feeEUR 950 (adults); EUR 200 (minors or widowed spouses of Irish citizens)

Important notes:

  • Naturalization in Ireland is entirely at the discretion of the Minister for Justice. Meeting the minimum requirements does not guarantee a positive decision.
  • Reckonable residence excludes periods as an asylum seeker and certain student permissions.
  • Ireland is not a member of the Schengen Area, though it is an EU member state with full EU freedom of movement rights.
  • Irish citizens enjoy full EU rights including the right to live, work, and study in any EU/EEA member state.
  • Ireland also benefits from the Common Travel Area (CTA) with the United Kingdom, allowing free movement between Ireland and the UK without passport controls.

Loss and Renunciation

Voluntary Renunciation

An Irish citizen who is also a citizen of another country may renounce Irish citizenship by making a declaration of alienage (Section 21).

  • The declaration is lodged with the Department of Foreign Affairs.
  • Renunciation takes effect upon registration of the declaration.
  • A person who renounces Irish citizenship and subsequently wishes to resume it may apply for naturalization.

Involuntary Loss

Irish nationality law provides very limited grounds for involuntary loss:

GroundDetails
Fraud or misrepresentationNaturalization obtained through fraud, misrepresentation, or concealment of material facts may be revoked by the Minister for Justice (Section 19).
DisloyaltyCitizenship of a naturalized person may be revoked if they have, by any overt act, shown themselves to have failed in their duty of fidelity to the nation and loyalty to the State (Section 19).
Wartime conductA naturalized citizen who was ordinarily resident outside Ireland for 7 continuous years and has not registered annually with an Irish diplomatic mission may lose citizenship (Section 19(1)(e)) — though this provision is rarely invoked.

Note: Irish-born citizens and citizens by descent cannot be involuntarily deprived of citizenship.

Restoration of Nationality

A person who previously renounced Irish citizenship through a declaration of alienage may resume citizenship by applying for naturalization. The Minister has discretion to waive or reduce the residency requirements in such cases.

Persons who lost Irish citizenship due to the historical rule (repealed in 2001) that acquisition of a foreign citizenship caused automatic loss may have their citizenship recognized retroactively, as the current law treats them as never having lost it.

Stateless Persons and Foundlings

Foundlings (Section 10): A child found in Ireland whose parents are unknown is presumed to have been born in Ireland and is therefore entitled to Irish citizenship, unless the contrary is proven.

Stateless persons: Ireland has acceded to the 1954 Convention Relating to the Status of Stateless Persons and the 1961 Convention on the Reduction of Statelessness. The Minister for Justice has discretion to waive naturalization conditions for stateless persons, including the residency requirement. Stateless children born in Ireland are entitled to citizenship.

Document Checklist

Completed application form (Form 8 for adults; Form 8A for minors)

Current valid passport or national identity document

Birth certificate (original, with certified English translation if applicable)

Marriage or civil partnership certificate (if applicable)

Evidence of residency — GNIB/IRP registration cards, stamps in passport

Proof of reckonable residence — utility bills, employment records, tax returns, social welfare statements

Proof of current residence status and permission

Two passport-sized photographs (signed by a witness)

Statutory declaration of good character (sworn before a solicitor/commissioner for oaths)

Garda vetting disclosure (arranged by the Irish Naturalisation and Immigration Service)

Application fee (EUR 175, non-refundable)

Certification fee (EUR 950 adults / EUR 200 minors, payable upon approval)

Declaration of fidelity and loyalty (made at citizenship ceremony)

Sources

  1. Irish Nationality and Citizenship Act 1956 (as amended). Full text: https://www.irishstatutebook.ie/eli/1956/act/26/enacted/en/html

  2. Irish Nationality and Citizenship (Amendment) Act 2004. https://www.irishstatutebook.ie/eli/2004/act/38/enacted/en/html

  3. Department of Justice — Irish Naturalisation and Immigration Service (INIS). https://www.irishimmigration.ie/citizenship/

  4. Department of Foreign Affairs — Foreign Births Register. https://www.ireland.ie/en/dfa/citizenship/born-abroad/registering-a-foreign-birth/

  5. Good Friday Agreement (1998). https://www.gov.ie/en/publication/the-good-friday-agreement/

  6. Twenty-seventh Amendment of the Constitution of Ireland. https://www.irishstatutebook.ie/eli/2004/ca/27/enacted/en/html

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