Explainer: Becoming an Irish citizen

A Know Your Rights article by Cork City Citizens Information regarding Irish citizenship entitlements. 
Explainer: Becoming an Irish citizen

People attend an Irish citizenship ceremony at the Convention Centre in Dublin in 2024

If you or your parents were born in Ireland, or if you were adopted in Ireland, you may be an Irish citizen by birth.

If you are not entitled to Irish citizenship by birth, you may be able to become an Irish citizen by registering your birth on the Foreign Births Register, or by applying for naturalisation.

Who is an Irish citizen by birth?

You are entitled to be an Irish citizen by birth if you fall into one of these categories:

1. Born in Ireland before January 1, 2005

If you were born in Ireland before January 1, 2005, you are an Irish citizen by birth. If you were born in Northern Ireland before January 1, 2005, you are entitled to claim Irish citizenship. This means you can choose to be an Irish citizen and apply for an Irish passport.

2. Born in Ireland after December 31, 2004

The people of Ireland voted to change the constitutional right to citizenship in the 27th Amendment to the Irish Constitution. It ended the automatic entitlement to citizenship by birth to everyone born in Ireland. What this means in practice is, if you are born on or after January 1, 2005, your entitlement to Irish citizenship depends on the nationality or residence history of your parent or parents.

Irish or UK parent

If either of your parents was an Irish or UK citizen at the time of your birth, you are automatically an Irish citizen if you were born in Ireland. If you were born in Northern Ireland to an Irish or British parent, you can choose to be an Irish citizen. Even if your Irish or UK-citizen parent died before you were born, you are an Irish citizen by birth.

Parent from outside Ireland and UK

If you were born in Ireland on or after January 1, 2005, and neither of your parents were Irish or UK citizens, your entitlement to Irish citizenship by birth depends on your parents’ residence status and history.

One of your parents must have:

  • Lived in Ireland or Northern Ireland for 3 out of the 4 years before you were born or
  • Have the right to live in Ireland or Northern Ireland without any restriction on their period of residence.

Only reckonable residence is counted towards the 3 out of 4 years needed. This does not include periods spent in Ireland on a student visa or while waiting for a decision on an international protection application.

If you were born in Ireland after December 31, 2004, and do not qualify as an Irish citizen by birth, you can apply for citizenship by naturalisation after you have completed 5 years of residence in Ireland. You can apply for your child after they have completed 3 years of residence in Ireland.

3. Born outside Ireland to an Irish parent

If you were born outside of Ireland, you are automatically an Irish citizen by birth if either of your parents was born in Ireland and was entitled to Irish citizenship.

4. Born in Ireland with no right to citizenship of another country

If none of the above applies to you and you were born in Ireland, but you are not entitled to citizenship of any other country, you are an Irish citizen by birth.

Irish citizenship if you’re born abroad

If either of your parents was born in Ireland and was an Irish citizen at the time of your birth, you are automatically an Irish citizen by birth. If the parent through whom you are entitled to Irish citizenship was deceased at the time of your birth, but would have been an Irish citizen if alive at that time, you are also an Irish citizen.

Irish citizen parent born outside Ireland

If you were born outside of Ireland and your parent (who was also born outside of Ireland) was an Irish citizen or entitled to be an Irish citizen at the time of your birth, you are entitled to become an Irish citizen. To claim Irish citizenship, you must have your birth registered in the Foreign Births Register, unless your parent was abroad in the public service at the time of your birth. If you are entitled to register, your Irish citizenship is effective from the date of registration - not from the date when you were born.

Citizenship through descent from Irish grandparent

If one of your grandparents was born in Ireland, but neither of your parents was, you may become an Irish citizen. You will need to have your birth registered in the Foreign Births Register.

Other Irish ancestors

Unless at least one parent or an Irish-born grandparent was an Irish citizen at the time of your birth, you have no automatic right to Irish citizenship on the basis of extended previous ancestry (that is, ancestors other than your parents or grandparents).

In addition, you cannot claim Irish citizenship on the basis that a relation such as a cousin, aunt or uncle was an Irish citizen if none of your parents or grandparents was an Irish citizen at the time of your birth.

You can, however, apply for citizenship based on Irish associations, which is at the discretion of the Minister.

Irish association means that you are related by blood or through adoption to an Irish citizen. If you are considering making an application based on Irish descent or association, you should note the following:

  • You should have a reasonable period of legal residence in Ireland (at least 3 years) to show that you have a connection to Ireland.
  • Applications based on descent from an Irish citizen going further back than a great-grandparent are generally refused.
  • Applications based on being the parent or grandparent of an Irish citizen (by ‘ascent’), or the brother or sister of an Irish citizen are generally refused.
  • Applications based on Irish descent or associations can take up to 30 months to process.

Irish citizenship through adoption

Under the Irish Nationality and Citizenship Act 1956, if a child who is not an Irish citizen is adopted by an Irish citizen or a couple where either spouse is an Irish citizen, then the adopted child shall be an Irish citizen.

If an Irish citizen who is living abroad adopts a child abroad, they should apply for the adoption to be entered in the Register of Intercountry Adoptions. Once it is registered, the adoption has the same legal status as if the adoption was made in the State.

If an Irish citizen living in the State is in the process of having a foreign adoption recognised here, certain immigration procedures must be observed.

In order for the adopted child to enter the State, you must get immigration clearance in advance from the Department of Justice.

This clearance will only be granted once the adoptive parent(s) proposing to adopt abroad have successfully completed the assessment procedure and have had a declaration made in their favour by the Adoption Authority of Ireland. This is called an intercountry adoption.

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