Irish Address Format: How to Write an Ireland Address Correctly

What is the correct Irish address format? A Republic of Ireland address is written recipient-first, smallest-unit to largest, with the Eircode on its own line near the bottom of the block — for example: Mr S. Byrne / 24 Merrion Square / DUBLIN 2 / D02 X285. The county is only needed when it isn’t obvious from the town name, and Eircode has replaced the county as the line that actually pinpoints delivery. If you are sending from the United States, add IRELAND as the final line so USPS and UPS route the parcel to the right country.

What Is the Correct Irish Address Format?

A correctly formatted Republic of Ireland address is stacked one element per line, working from the individual up to the country. An Post’s national addressing standard, as filed with the Universal Postal Union, gives this canonical structure:

• Addressee’s name (with title where known)
• Company or organization name (business mail only)
• House number and street name — or house name and townland, in rural areas without a formal street address
• Town or post town, with the Dublin postal district number included where applicable (e.g. “Dublin 2”)
• County name — unless it is identical to the town name (an address in Dublin city doesn’t repeat “Co. Dublin”)
• Eircode, on its own line
• Country name, for international mail only

The name and address sit in the bottom-left area of the front of the envelope or parcel, with every line starting at the same left margin rather than indented. When a US shipper prepares a label through a platform like ParcelPath’s Ireland shipping page, that same line order applies, with one addition covered below: the destination country on the final line.

What Are the Essential Components of an Irish Address?

Each line does a specific job in the delivery chain. The two lines that matter most for accurate sorting are the town/postal district line and the Eircode — the county line, by contrast, is now largely a legacy convenience rather than a routing requirement.

Line	What it is	Example	Required?
Recipient	Person or business receiving the item	Mr S. Byrne	Yes
Street / townland address	House number + street name, or house name + townland	24 Merrion Square	Yes
Town / post town	Delivery town, with Dublin postal district number if applicable	DUBLIN 2	Yes
County	County name, omitted when identical to the town	Co. Wicklow	Only if needed
Eircode	7-character routing key + unique identifier, on its own line	D02 X285	Strongly recommended
Country	Destination country for international mail	IRELAND	Yes (from abroad)

The detail that surprises most US senders is that a full street number and name are not universal in Ireland. Large parts of rural Ireland were never assigned formal street addresses; a townland name — a small traditional land division, often centuries old — combined with the nearest town and county has historically been the entire delivery address. Eircode was introduced specifically to give those addresses, and the roughly one-third of Irish addresses that share a building or location with at least one other property, a precise, individual identifier.

How Does the Irish Eircode System Work?

Eircode is a seven-character alphanumeric code, and it works differently from almost every other national postcode system. Per Eircode.ie, the seven characters split into two parts:

• Routing key (3 characters, e.g. D02): identifies the area — a post town or, in County Dublin, a legacy Dublin postal district. All addresses in the same postal area share the same routing key.
• Unique identifier (4 characters, e.g. X285): identifies the specific building or address within that area. It is randomly assigned rather than sequential, and no two buildings anywhere in the country share the same unique identifier.

This is the single most distinctive fact about Irish addressing. Most countries’ postal codes — including the US ZIP code and the UK postcode — route mail to a shared cluster of addresses on a street or in a neighborhood, and the carrier or letter carrier still has to match the exact house number within that cluster. Eircode instead identifies one individual address directly, because Ireland’s addressing gap was unusually severe: more than a third of Irish addresses shared a location with at least one other property before Eircode existed, with no reliable way to distinguish them. The Eircode sits on its own line, typically directly beneath the town line and just above the country line on international mail.

Dublin adds one more wrinkle worth knowing. The city’s historic postal districts — Dublin 1 through Dublin 24, plus split districts like D6W — existed for decades before Eircode and are still written into the address (e.g. “Dublin 2,” “Dublin 6W”). When Eircode was designed, Dublin’s routing keys were built directly from those same district numbers — D01 through D24 — so the legacy district and the modern routing key line up. Outside Dublin, where postal districts were never in public use, all 139 routing keys nationwide are newly assigned post-town codes.

How Do You Address an Irish Parcel From the United States?

Shipping into the Republic of Ireland from the US adds exactly one rule to everything above: the last line of the address must be the destination country, written in English capitals — IRELAND. USPS and UPS sort outbound international parcels by that country line first, before the Eircode is ever read, so omitting it is the fastest way to have a package held or returned. Note that ParcelPath issues discounted USPS and UPS labels — those are the two carriers ParcelPath ships Ireland-bound parcels through; An Post is Ireland’s own national postal operator and handles last-mile delivery inside the country, not the outbound US leg.

Practical points for US-origin Ireland shipments:

• Use Latin characters and English throughout. Irish addresses are already Roman-alphabet, so no transliteration is needed — but keep the whole label in English and avoid accented Irish-language place names the carrier’s system may drop.
• Put the Eircode on its own line, in capitals, immediately above the country line.
• Include a working phone number and email in the label’s contact fields — Irish customs (Revenue) and last-mile couriers use them for duty/VAT contact and delivery notifications.
• Both USPS and UPS reach every Irish Eircode area. The Ireland destination guide covers current transit windows and customs paperwork.

For the customs side of an Irish parcel — the CN22/CN23 declaration, commodity codes, and EU VAT/import rules — see our international shipping hub, which walks through the documentation that keeps a parcel out of a customs hold.

What Are the Most Common Irish Address Mistakes to Avoid?

Almost every failed or delayed Irish delivery traces back to one of a short list of formatting errors:

• Omitting the Eircode entirely. Because Eircode is still relatively new (introduced in 2015) and not legally mandatory, many senders skip it — but without it, a courier is relying on a townland name or a shared street cluster to find one specific address.
• Confusing the Eircode with a UK-style postcode. A UK postcode routes to a shared cluster of addresses; an Eircode routes to one specific address. Copying a UK postcode’s format or logic onto an Irish label produces an invalid code.
• Dropping the county for rural addresses where it still matters. In a townland-based rural address, the county can be the only thing disambiguating two identically-named townlands in different parts of the country — omit it and delivery can misroute even with an Eircode present.
• Mixing up Dublin postal district numbers with Eircode routing keys. “Dublin 6W” (the legacy district) and “D6W” (the Eircode routing key) look similar and are related, but they are not interchangeable line items — the district number belongs on the town line, the routing key is the first three characters of the Eircode line.
• Forgetting “IRELAND” on mail sent from abroad. Without the country line, a US carrier can’t route the parcel internationally.
• Addressing Northern Ireland as “Ireland.” Northern Ireland is a separate jurisdiction within the United Kingdom — see below.

How Do You Handle Rural Townlands, Dublin’s Legacy Districts, and Northern Ireland?

A few Ireland-specific cases trip up international senders:

• Rural addresses without a house number or street. Much of rural Ireland has historically been addressed by townland — a small, often centuries-old land division — plus the nearest town and county, with no formal street name or number. That format is still valid and still delivers; the Eircode simply adds a precise, unique identifier on top of it, it does not replace the townland line.
• Dublin’s legacy postal district system. Districts like Dublin 6 and Dublin 6W predate Eircode by decades and remain part of the town line of the address (e.g. “Dublin 6W”). They continue to be used alongside — not instead of — the Eircode, and Dublin’s Eircode routing keys were deliberately built to match them.
• Northern Ireland is a separate jurisdiction. Northern Ireland is part of the United Kingdom, uses the UK address format, and is assigned UK postcodes (starting with prefixes like BT) — not Eircodes. A Belfast or Derry address should never be addressed as “Ireland”; see our UK Address Format guide for the correct format there.

Frequently Asked Questions

Do I need to include the county in an Irish address?

Only when it isn’t identical to the town name, and it still matters for rural townland-based addresses where the county can disambiguate two similarly named places. In cities and towns where the county is obvious from the town name, An Post’s guidance treats it as optional. The Eircode, not the county, is now the line that actually pinpoints delivery.

Where does the Eircode go in an Irish address?

On its own line, typically just below the town/county line and, on international mail from the US, directly above the final “IRELAND” country line. It should be written in capitals with a single space between the 3-character routing key and the 4-character unique identifier (e.g. D02 X285).

How is an Eircode different from a UK or US postal code?

A UK postcode or US ZIP+4 still routes to a shared cluster of nearby addresses. An Eircode identifies one specific address directly — its 4-character unique identifier is unique to that single building nationwide, so no two properties in Ireland share the same Eircode.

Do I add “Ireland” when shipping from the US?

Yes — always, as the last line in English capitals: IRELAND. USPS and UPS sort outbound parcels by the destination country first. Without it, the parcel can be held domestically or returned before it ever leaves the US.

Is the address format the same for Northern Ireland?

No. This guide covers the Republic of Ireland only. Northern Ireland is part of the United Kingdom, uses the UK address format, and is assigned UK postcodes rather than Eircodes — it should be addressed as “UNITED KINGDOM,” not “Ireland.” See our UK Address Format guide for that format.

Sources

• Universal Postal Union — Ireland Postal Addressing Guide (An Post national standard)
• Eircode.ie — What Is Eircode
• Wikipedia — Eircode
• Wikipedia — Postal addresses in the Republic of Ireland
• Wikipedia — List of Eircode routing areas in Ireland

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Part of our Shipping to Ireland guide. Related: International Shipping hub · UK Address Format.