If one of your grandparents was born in Ireland, you may be able to become an Irish citizen and carry an Irish passport. This guide is for Americans with Irish roots: who qualifies, who does not, what it costs, and how long it takes, straight from official Irish government pages.
Prefer to watch? The 14-minute video above covers everything on this page. Thinking of making the move? Get the free Moving to Ireland checklist.
Start with one question
Who in your family was born on the island of Ireland: you, your parent, your grandparent, or someone further back? The answer points you to the right rule.
Who is already an Irish citizen
☘️ Your Irish family has a story waiting to be found.
Discover where your Irish ancestors came from — their county, their name, their story. Our free step-by-step guide walks you through every record, DNA tool, and ancestry archive. No experience needed.
☘️ Join 64,000+ Ireland Lovers
Every weekday morning, get Ireland’s hidden gems, local secrets, and travel inspiration — the kind you won’t find in any guidebook.
Subscribe free — enter your email:
Already subscribed? Download your free Ireland guide (PDF)
📲 Know someone who’d love this? Share on WhatsApp →
Love more? Join 43,000 Scotland lovers → · Join 29,000 Italy lovers → · Join 7,000 France lovers →
Free forever · Unsubscribe anytime
If you were born on the island of Ireland before 1 January 2005, you are entitled to be an Irish citizen. For births from that date on, it depends on your parents’ citizenship, their residence rights, and how long they had lived there.
Suppose your mother or your father was born on the island of Ireland, and was an Irish citizen when you were born. Then you are already an Irish citizen, automatically. You do not need to register anything. You can apply for your Irish passport directly.
The grandparent rule
Say your grandparent was born on the island of Ireland, your parent was born outside Ireland, and so were you. Then you can apply to be entered on the Foreign Births Register.
Once you are on that register, you are an Irish citizen, and you are entitled to apply for an Irish passport.
Notice the difference. With an Irish-born grandparent, you are not a citizen yet. Registration is the step that makes it real.
Which grandparent counts?
- It can be any one of your grandparents.
- The line can run through your mother or through your father.
- Your parents do not need to have Irish passports.
- Your grandparent does not need to be living. If they have passed away, you send their death certificate in place of their photo identification.
Northern Ireland counts
The rule says the island of Ireland, not the Republic of Ireland. That means the whole island, north and south. A grandparent born in Belfast or Derry counts the same as one born in Cork or Galway.
Great-grandparents: the honest answer
A great-grandparent born in Ireland is usually not enough. Official guidance says you have no automatic right to citizenship through ancestors further back than your grandparents. The same goes for an Irish aunt, uncle, or cousin.
Here is the usual way it can still work. If your parent was already on the Foreign Births Register before you were born, then your parent was an Irish citizen at your birth, and you can register too. If your parent registers today, that does not reach back to cover you.
So if your closest Irish-born ancestor is a great-grandparent, and your parent was not registered before your birth, for most families this route is closed. A few older or unusual cases are different, and the Department can confirm yours.
There is a separate application based on Irish associations. It is decided at the discretion of the Minister, and those cases are taking more than 30 months.
What about your children?
If your children were born outside Ireland before you were registered, they are not eligible through your registration. In the words of the Department, you were not an Irish citizen at the time of their birth.
Children born after you are on the register can apply to be registered too. Expectant parents can make an urgent request by phone, with supporting documents. The Department says it will make every effort, but it cannot guarantee the entry will be made in time.
One twist helps some families. If it was your parent who was born in Ireland, and was Irish when you were born, you are already a citizen. That means your children have a grandparent born in Ireland. So they can use the grandparent rule themselves, whether they are children or adults.
The documents you need
You need to prove three generations: you, your parent, and your grandparent. The Department wants original, state-issued certificates, not photocopies. Your originals are returned to you at the end, by recorded mail.
For you
- Your original civil birth certificate, the one that shows your parents’ details
- Your marriage certificate, or other change of name document, if that applies
- A photocopy of your current government-issued photo identification, certified by your witness
- 2 separate original proofs of address
- 4 color photographs
For your parent, and again for your grandparent born in Ireland
Your parent here means the child of your Irish-born grandparent. For each of them:
- Their original civil birth certificate, showing parental details
- Their marriage certificate, or change of name document, if that applies
- A certified photocopy of their current government-issued photo identification, or their original death certificate
If your grandparent was born before 1864, when civil birth registration began, the Department can accept a baptismal certificate.
How to find the Irish birth record
Start at irishgenealogy.ie, a website run by the Irish government. It has civil birth records from 1864 to 1925. Births only appear there once they are more than 100 years old.
What you find there is for research. It is not the document you send. For the application, order a long-form birth certificate online from Ireland’s civil registration service, and it is mailed to you. It costs €20, plus €5 postage to the United States.
The same Irish service has births registered in what is now Northern Ireland from 1864 through 1921. For later Northern Ireland births, irishgenealogy.ie sends you to the General Register Office for Northern Ireland.
How to apply, step by step
- Gather everything first. Incomplete applications are returned and not processed.
- Complete the online form on the Department of Foreign Affairs website. There is no paper form.
- Pay the fee online and print your completed form.
- Sign it in front of a witness. The witness must know you personally, must not be a relative, and must work in one of the listed professions.
- Mail the form, the photographs, and your original documents to the address printed on your form.
Your witness
The listed professions include doctors, nurses, teachers, lawyers, police officers, clergy, accountants, bank managers, and notaries public.
- The same witness signs and dates 2 of your 4 photographs.
- They stamp the form, and they certify the copy of your identification.
- If they have no official stamp, include their business card.
Irish consulates in the United States do not process these applications. They are all processed in Dublin. Use mail you can track, because the Department does not acknowledge receipt.
Fees and waiting time
As of October 2026, the fee for an adult is €278. That is €270 for registration and the certificate, plus €8 for postage and handling. For a child under 18, the total is €153.
The Department says processing is currently taking approximately 12 months. That clock starts when your correct documents arrive, not when you fill in the form. If they need clarification or more documents, it takes longer.
The passport is a separate second step
When you are registered, you receive a Foreign Birth Registration certificate. Your citizenship begins on the date of registration, not on the date you were born.
You cannot apply for the passport at the same time. It comes after.
- You apply for the passport online, and you can do that from the United States.
- A standard 10-year adult passport costs €75, plus €15 postage if you live outside Ireland.
- You send your registration certificate, your full birth certificate, photo identification, and separate proofs of your name and your address.
- A witness in your own country signs your identity verification form, and the online application lists exactly what to send.
The current average for a first-time online application is 20 working days. That counts from when your documents arrive, and mailing time is extra. First-time applications cannot be rushed, so do not book travel until the passport is in your hand.
What Irish citizenship gives you
- As an Irish citizen, you are also a citizen of the European Union.
- You have the right to live and work in Ireland and in the European Union.
- Irish citizens can also live, work, and study in the United Kingdom.
- You can ask Irish embassies for consular help abroad.
For stays beyond 90 days in another European Union country, conditions such as work, study, or sufficient funds can apply.
Do you have to give up your American citizenship?
Not under Irish law. Ireland’s immigration service says you do not have to give up another citizenship to claim Irish citizenship by descent.
For the American side of that question, check with the United States Department of State.
Mistakes to avoid
The Department says it is seeing more incomplete applications, and they slow things down.
- Make sure each birth certificate shows the parents, so the three generations link together.
- If a name changed through marriage, include the document that shows it.
- Do not put a passport application in the same envelope. Everything will be sent back to you.
If you are refused after sending every required document, you have 6 weeks from the date of the refusal letter to appeal in writing.
In five lines
- A parent born in Ireland, and Irish when you were born, means you are already a citizen.
- A grandparent born anywhere on the island means you can register.
- A great-grandparent usually only works if your parent was registered before you were born.
- Registration costs €278 for an adult, and takes about 12 months.
- The passport comes after, as a separate application.
Please note
This article is general information, not legal advice. The facts were checked against official Irish government pages on 6 October 2026. Rules, fees, and waiting times change, so check the official pages at ireland.ie before you apply.
Official sources
- Department of Foreign Affairs: Registering a foreign birth
- Department of Foreign Affairs: Citizenship
- Foreign birth registration review process
- Passport Service: First-time adult passport
- Passport Service: Turnaround times
- Citizens Information: Citizenship through birth or descent
- Citizens Information: The Foreign Births Register
- Citizens Information: Common Travel Area
- Immigration Service Delivery: Dual citizenship
- Immigration Service Delivery: Irish descent or associations
- irishgenealogy.ie: Civil records
- HSE: Order an Irish birth certificate
Thinking of making Ireland home?
If your grandparent’s story is pulling you toward Ireland, the next step is our free Moving to Ireland checklist.
Tours & experiences you might love
Powered by Viator. Some links are affiliate links — we may earn a small commission at no extra cost to you.
Secure Your Dream Irish Experience Before It’s Gone!
Planning a trip to Ireland? Don’t let sold-out tours or packed attractions spoil your journey. Iconic experiences like visiting the Cliffs of Moher, exploring the Rock of Cashel, or enjoying a guided walk through Ireland’s ancient past often sell out quickly—especially during peak travel seasons.
Booking in advance guarantees your place and ensures you can fully immerse yourself in the rich culture and breathtaking scenery without stress or disappointment. You’ll also free up time to explore Ireland’s hidden gems and savour those authentic moments that make your trip truly special.
Make the most of your journey—start planning today and secure those must-do experiences before they’re gone!