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Ireland citizenship by descent is governed by Foreign Births Register — grandparent rule. If you have one Irish-born grandparent, you are eligible for the Foreign Births Register. Your parent must have been registered before your birth in some cases — we trace the chain and confirm eligibility precisely. Ireland permits dual citizenship and recognizes all diaspora returns.
This pillar page clusters every piece of Ancestra content related to Irish citizenship by descent — country guide, document checklists, comparisons, glossary terms, cost estimates, and eligibility assessment — in one place.
The key thing to know: The grandparent rule is the most common path, but if your Irish connection is through a great-grandparent, you generally don't qualify unless your parent was registered on the FBR before your birth.
Transmission rule: Both parents equally since 1956.
Generational limit: Grandparent (3rd generation). If your parent was registered on the Foreign Births Register before your birth, the line extends further.
Dual citizenship: Permitted — Ireland allows dual citizenship and recognizes all diaspora returns.
Language requirement: None.
Filing authority: Department of Foreign Affairs (Citizenship Division), via Irish consulate or directly.
FAQ
Is there a generational limit for Ireland citizenship by descent?
Ireland: Grandparent (3rd generation). If your parent was registered on the Foreign Births Register before your birth, the line extends further.
Does Ireland allow dual citizenship?
Ireland: Permitted — Ireland allows dual citizenship and recognizes all diaspora returns.
Related resources
Ireland country guide
Foreign Births Register — grandparent rule
Ireland checklist (grandparent)
Complete document checklist for claiming through a grandparent
Ireland checklist (parent)
Complete document checklist for claiming through a parent
Ireland cost calculator
Estimate your all-in cost
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