Irish Citizenship Through Ancestry

Irish heritage is carried by over 70 million people worldwide. Known for its lush landscapes, storied past, and enduring sense of identity, Ireland has shaped the lives of generations through both presence and absence. For many, the journey began with a departure, whether fleeing hardship or seeking opportunity. But the connection to Ireland’s unique identity never faded.

Today, that connection can be made official. If your parent, grandparent, or even great-grandparent was born in Ireland, you may be eligible to reclaim Irish citizenship and reconnect with your past.

Are you ready to check your eligibility to apply?

Ireland Eligibility Live Results

The results below are based on the users who complete our Free Eligibility Assessment tool on the Citizenship.EU app, and are updated in real time.

*Represents submissions received since February 15, 2026

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Ireland Eligibility Requirements

Eligible Generations

Up to your great-grandparents

To meet typical Irish eligibility requirements, you must be two generations removed or less to apply for Irish citizenship through ancestry. In limited cases a case can be filed based on a -great grandparent or further removed, but will require that your parent was registered in Ireland’s Foreign Births Register before you were born.

Travel Required?

No international or domestic travel is required in order to apply for Irish citizenship through ancestry.

Language requirement?

While other application criteria must be met to apply, there is no language requirement to apply for Irish citizenship through ancestry.

Ways to Apply

Two Pathways

Ireland allows citizenship through ancestry to be obtained for interested applicants whose connection back to Ireland meets one two different sets of requirements:

You may request proof of Irish citizenship if your parent was born on the island of Ireland.
You may register yourself in Ireland’s Foreign Birth Register if your grandparent was born on the island of Ireland, OR if your great-grandparent was born on the island of Ireland AND your parent was registered in Ireland’s Foreign Birth Register before you were born

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Irish Citizenship Quote

Our team will reach out with an estimated quote and next steps to confirm your eligibility – no commitment required!

Likelihood of Eligibility

Irish Citizenship May Be Closer Than You Think

Eligibility to apply for citizenship through ancestry isn’t always obvious. But based on real user data, for many, it may be closer than expected.

With citizenship comes the opportunity to live, work, study, and retire across the European Union—along with a meaningful way to honor your ancestry and reconnect with your family history.

This chart reflects real results from users who completed our Free Eligibility Assessment, highlighting that a simple verification can uncover life-changing opportunities.

I May Be Eligible
What Are Next Steps?

Confirm your Eligibility and Begin Your Application Today!

Step 1.
Sign Up and Assess Eligibility

Use our free eligibility assessment tool to learn if your EU lineage is potentially qualifying. For more complex lineages, subscribe for access to our Eligibility Report where we will verify your eligibility to apply.

Step 2.
Complete Citizenship Application Your Way

Whether you are looking for DIY-application instructions, additional genealogy research, or a vetted citizenship expert to help you file your citizenship application, our network of providers and tailored packages are ready to assist you.

Step 3.
Obtain Citizenship

Do you have questions about your recently obtained citizenship? Our network of country-specific experts can advise you about next steps related to your dual citizenship.

Your guide to Irish citizenship

We cover essential information regarding applying for and achieving EU nationality through ancestry. This blog also explores relocation resources, citizenship programs outside of the EU, and more.

Street view, Dublin, Ireland; Irish citizenship by descent is a viable pathway for those with Irish ancestry, though some applicants may need to register in the FBR.

Irish Foreign Births Register Explained: What Irish Citizenship by Descent Applicants Should Know

The United States Capitol Building in Washington D.C. is framed by a busy street and trees at sunset.

Irish Consulates: How to Apply for Citizenship Abroad

The national flag of Ireland, with its vertical stripes of green, white, and orange, waving from a flagpole.

Required Documents for Irish Citizenship Applications

Frequently Asked Questions

Can I get Irish citizenship if my great-grandparents were Irish?

Yes, but only if your parent registered as an Irish citizen before your birth. Ireland allows citizenship to pass from a great-grandparent only when the intermediate generations—your grandparent and parent—either held Irish citizenship or registered in the Foreign Births Register before you were born. If that didn’t happen, you are not eligible based solely on a great-grandparent connection.

How many generations back can you claim Irish citizenship?

You can typically claim Irish citizenship through a parent or grandparent. If your parent was born in Ireland, you are automatically entitled to citizenship. If your grandparent was born in Ireland, you can become a citizen by registering your birth in the Foreign Births Register. You may also qualify through a great-grandparent, but only if your parent had already claimed and registered their Irish citizenship before you were born, ensuring an unbroken chain.

How do I claim my Irish citizenship by descent?

To claim Irish citizenship by descent, you must apply to be included in the Foreign Births Register, a formal registry maintained by the Irish government. You begin by completing an online application with the Department of Foreign Affairs, then gather documents such as your own birth certificate, your parent’s and grandparent’s birth and marriage certificates, and documentation proving your Irish ancestor’s birth in Ireland. After submitting your paperwork and paying the processing fee, your citizenship will be confirmed once the application is approved. You’ll then receive a certificate that serves as proof of your Irish nationality.

What percentage of Irish ancestry do you need to get citizenship?

Irish law does not base citizenship on percentages of ancestry. What matters is direct descent. If you have a parent or grandparent born in Ireland, or a great-grandparent under very specific conditions, you may be eligible. Citizenship is determined by legal lineage and registration status, not ethnic background or DNA.

Can I get Irish citizenship through my grandparent?

Yes. If one of your grandparents was born in Ireland, you are entitled to Irish citizenship by descent. You must register your birth in the Foreign Births Register and prove the chain of lineage with official documentation. Once registered, you are legally recognized as an Irish citizen and can apply for an Irish passport.

How do I get an Irish passport by descent?

Once you have been registered in the Foreign Births Register and officially recognized as an Irish citizen, you can apply for an Irish passport. You’ll need your citizenship certificate, a valid photo ID, proof of address, passport photos, and your completed passport application. Applications can be submitted online or through your local Irish consulate or embassy, depending on your location.

How can Citizenship.EU help me get my Irish citizenship?

Citizenship.EU provides expert support at every stage of the process. They assess your eligibility based on your ancestry, identify the necessary documents for your application, and guide you through the Foreign Births Register process. Their services include verifying your family lineage, helping secure translated or legalized documents, and managing the application submission. With their help, you can avoid delays and increase the likelihood of success—especially in more complex cases involving great-grandparent claims or missing documents.

Can a US citizen get Irish citizenship by descent?

Yes. If you are a U.S. citizen and have at least one parent or grandparent who was born in Ireland, you are eligible to claim Irish citizenship by descent. The process requires proving your familial connection to the Irish-born ancestor through birth and marriage records, and registering in Ireland’s Foreign Births Register. Once approved, you become an Irish citizen and are entitled to an Irish passport—without giving up your U.S. citizenship, as both Ireland and the United States allow dual nationality.