Republic of Ireland Postal Codes
Republic of Ireland uses postal codes in the format @@@ @@@@ (# = digit, @ = letter).
139 postal codes are recorded for Republic of Ireland in the open data sources below.
Note on coverage. For Republic of Ireland, only the first three characters of each Eircode (the routing key) are published as open data, for copyright reasons. The codes below are accurate as far as they go, but this is not the country's complete postal code list — use the official finder for a specific address.
In Republic of Ireland a postal code is called a Eircode. You will see that term on forms and address labels.
Postal codes by town and city
139 places in Republic of Ireland have a recorded postal code. The 0 largest have their own page; the rest are listed alphabetically.
Browse every place A–Z
A B C D E F G K L M N O P R S T W Y
Example postal codes
A65 F4E2
Largest places and their postal codes
The 60 largest places in Republic of Ireland by population, with a postal code for each. Larger towns link to their own page.
| Place | Postal code | Population |
|---|---|---|
| Limerick | V94 | 102,287 |
| Galway | H91 | 85,910 |
| Waterford | X91 | 60,079 |
| Drogheda | A92 | 44,135 |
| Dundalk | A91 | 43,112 |
| Swords | K67 | 40,776 |
| Bray | A98 | 33,512 |
| Dun Laoghaire | A96 | 31,239 |
| Carlow | R93 | 27,351 |
| Tralee | V92 | 26,079 |
| Portlaoise | R32 | 23,494 |
| Athlone | N37 | 22,869 |
| Newbridge | W12 | 22,742 |
| Mullingar | N91 | 22,667 |
| Letterkenny | F92 | 22,549 |
| Greystones | A63 | 22,009 |
| Balbriggan | K32 | 21,722 |
| Kilkenny | R95 | 21,589 |
| Wexford | Y35 | 21,524 |
| Naas | W91 | 20,713 |
| Sligo | F91 | 20,608 |
| Ballincollig | P31 | 18,621 |
| Clonmel | E91 | 18,369 |
| Carrigaline | P43 | 18,239 |
| Maynooth | W23 | 17,259 |
| Malahide | K36 | 16,550 |
| Tullamore | R35 | 15,598 |
| Lucan | K78 | 15,269 |
| Cobh | P24 | 14,148 |
| Mallow | P51 | 13,456 |
| Arklow | Y14 | 13,399 |
| Castlebar | F23 | 13,054 |
| Wicklow | A67 | 12,957 |
| Ashbourne | A84 | 12,679 |
| Midleton | P25 | 12,496 |
| Cavan | H12 | 11,741 |
| Longford | N39 | 10,952 |
| Ballina | F26 | 10,556 |
| Shannon | V14 | 10,256 |
| Skerries | K34 | 10,043 |
| Nenagh | E45 | 9,895 |
| Gorey | Y25 | 9,822 |
| Enniscorthy | Y21 | 9,709 |
| Athy | R14 | 9,677 |
| Tuam | H54 | 9,647 |
| Trim | C15 | 9,563 |
| Rush | K56 | 9,231 |
| Glanmire | T45 | 8,924 |
| Blackrock | A94 | 8,821 |
| Kildare | R51 | 8,634 |
| New Ross | Y34 | 8,040 |
| Youghal | P36 | 7,963 |
| Thurles | E41 | 7,940 |
| Monaghan | H18 | 7,894 |
| Lusk | K45 | 7,786 |
| Dungarvan | X35 | 7,551 |
| Edenderry | R45 | 7,359 |
| Dunboyne | A86 | 7,272 |
| Bandon | P72 | 6,957 |
| Ballinasloe | H53 | 6,662 |
How an address is written in Republic of Ireland
This is the order Republic of Ireland's postal service expects. Square brackets mark what you replace.
[Recipient name]
[Street address]
[Townland]
[City]
[County]
[Eircode (A65 F4E2)]
REPUBLIC OF IRELAND
A postal code is optional in Republic of Ireland addresses — mail is deliverable without one, though including it speeds up sorting.
Look up a specific address
For the code covering one particular street or building, Republic of Ireland's postal service publishes an official finder: finder.eircode.ie. It is authoritative and kept current, which third-party copies often are not.
Country reference
| ISO 3166-1 alpha-2 | IE |
|---|---|
| ISO 3166-1 alpha-3 | IRL |
| Capital | Dublin |
| Telephone code | +353 |
| Currency | Euro (EUR) |
| Internet TLD | .ie |
Sources and licensing
Postal code data from GeoNames, used under the Creative Commons Attribution 4.0 International licence. Address formats and validation rules derive from Google's international address metadata, cross-checked against Universal Postal Union addressing standards. Last verified August 2026. Confirm time-critical addresses with the destination country's postal operator.