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Ireland address format, validation, & examples

How to write a Irish address

Top of the morning to you! Did you know that the letters IRL are actually Ireland’s country code IRL (in real life)? That’s fun, and so is understanding even more about Irish address formats. It looks like you are ready to learn about how to write a letter to friends and family members in Ireland, or to your favorite Aran sweater-making company. You can look at our Irish address examples here and try our suite of address validation tools for addresses in Ireland below. Just enter an address, and we'll format, standardize, and validate the address faster than a leprechaun runs away from you.

In this guide, we’ll also help you understand Ireland address validation and verification, so you can send mail to Ireland or process Irish address data programmatically via an API.

Now, let's get into it with the basics. The Ireland address format should be written as follows:

  1. Addressee line - The recipient's name.
  2. House number and street name - These are listed in this order, without commas between them.
  3. Dependent locality - On a line by itself, include the dependent locality, if applicable.
  4. Locality - The locality is also special and gets its own line.
  5. Administrative area - More special lines being dedicated to one thing, alert. The administrative area gets its own row.
  6. Postal code - The postal code goes here without any commas to separate the sections.
  7. Country - "IRL", in all caps.
Ireland mailing address format example on an envelope

Valid Ireland address examples

Address validation and verification in Ireland

For real-world applications, like delivery, identity verification, property risk scoring and compliance, understanding Ireland address formatting alone isn’t enough. Businesses looking for Ireland address validation and standardization will need an Irish address verification API to ensure accuracy.
Irish address verification checks whether an Irish address exists and is properly formatted in accordance with local postal standards. When built into applications or used to handle large address databases, an Ireland address validation API supports real-time automation and helps retrieve missing or incomplete address information.
Whether you need to validate a single address or millions of addresses, reliable Ireland address validation tools ensure better data quality and fewer delivery failures.

Smarty address validation tools for Ireland

Smarty® has a suite of Irish address validation tools that can format, standardize, and validate Irish addresses, along with addresses in 250+ other countries and territories worldwide. Accurate Ireland address lookups are just a call to Smarty’s scalable Irish address verification APIs away.

Using Smarty’s international single address verification tool, you can verify and format 1 address at a time, while the bulk address validation tool allows you to verify and format a list of addresses simultaneously. Or, you can use the International Street Address API to integrate address validation and formatting programmatically into your software systems and workflows.

Postal information

Ireland's national postal system, "An Post," was established in 1792. The organization manages a substantial network, indicative of its role as a major postal service provider in the region.
Administrative area types and count
4 provinces, 26 counties
Administration area names and abbreviations

Provinces:

Connacht - CN
Leinster - LS
Munster - MU
Ulster - UL
Counties:

Carlow - CW
Cavan - CN
Clare - CE
Cork - CO
Donegal - DL
Dublin - D
Galway - G
Kerry - KY
Kildare - KE
Kilkenny - KK
Laois - LS
Leitrim - LM
Limerick - LK
Longford - LD
Louth - LH
Mayo - MO
Meath - MH
Monaghan - MN
Offaly - OY
Roscommon - RN
Sligo - SO
Tipperary - T
Waterford - WD
Westmeath - WH
Wexford - WX
Wicklow - WW

Term to describe postal codes
eircode
Postal code in language
eircode
Postal code format
A99 A9A9
Postal service provider and website

Country information

Don’t lose your Claddagh ring as you clap for joy. We’re going to go through even more components of Ireland’s address format, including ISO codes, total land area, and major Irish cities.

Country/territory name
Ireland
ISO3
IRL
ISO 3166-1 alpha-2 country code
IE
ISO 3166-1 alpha-3 country code
IRL
ISO 3166-1 numeric country code
372
Endonym
Ireland
Total land area
70273 KM²
Capital
Dublin
Other major cities
Cork, Limerick, Galway

Population information

Total population
5262382 (2023)
Urban / rural distribution
63% / 37%
Urban population
3315301
Rural population
1947081
Official language
Irish, English
All languages spoken
English, Gaelic, French
Most commonly used postal language
English

Data from worldbank.org
CC-BY 4.0

Now that you've seen our Irish address examples and have become a wizard at Ireland address formats, why not expand your expertise even further? Explore our detailed guides for related countries and territories to see how their address formats and examples vary.
Visit the global address formats page or Europe address formats page for more information on all the other countries and territories we cover. You can also read or read our article about international address verification to learn more.
*Data updated as of June 12, 2026

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