Country
Ireland
Location
Castleknock
Postal Code
D20

What is Castleknock (Ireland) postal/zip code?

The postal code for Castleknock is D20. Postal codes in Castleknock consist of 3 characters following the format ANN ANNN. Castleknock is located in Leinster, Ireland, and is part of the Northern Europe region. This postal code is essential for accurate mail delivery, online shopping, and official documentation. Whether you're sending a package, filling out a form, or verifying an address, using the correct postal code ensures your mail reaches its destination without delays. You can scan the QR code on the right to quickly save or share the complete address information for Castleknock.

QR Code for Castleknock Scan Address

How to Address Mail to Castleknock

Standard Address Format (click to edit)
RecipientJohn Doe
Street123 Example Street
DistrictCastleknock
City & PostalD20 Leinster
CountryIRELAND

Addressing Tips for Ireland - Castleknock

  • Postal code format: ANN ANNN
  • Write postal code before the city name
  • Country name in UPPERCASE on last line
  • Include district name for faster delivery
  • ISO country code: IE

Shipping to Castleknock, Ireland

🇮🇪
Domestic Delivery
1-3 days
Within Ireland
International
7-21 days
Varies by origin
Customs Threshold
€150
Duty-free limit

Local Carriers in Castleknock

An Post Fastway DPD

Castleknock: International Carriers

DHL FedEx UPS

Shipping Tips (Castleknock)

  • Always include postal code D20 for faster delivery
  • Items above €150 may incur customs duties
  • Track your package using the carrier's tracking number
  • Consider insurance for valuable shipments

Castleknock Ireland Location Information

Castleknock, Ireland Map
  • Region Europe
  • Subregion Northern Europe
  • State Leinster
  • Phone Code +353
  • Currency EUR
  • Coordinates 53.3748, -6.3634
Free Traffic Exchange

5 Postal Codes in Castleknock

Area State Place Postal Code
Castleknock Leinster Dublin 20 D20
Castleknock Leinster Dublin 15 D15
Castleknock Leinster Dublin 10 D10
Castleknock Leinster Dublin 11 D11
Castleknock Leinster Dublin 7 D07

Frequently Asked Questions

The postal code of Castleknock, Leinster, Ireland is D20. This 3-character code follows the format ANN ANNN.
Castleknock has approximately 5 postal codes covering different areas and neighborhoods within the district.
Castleknock is located in Leinster, Ireland. It is part of the Europe region and Northern Europe subregion. The coordinates are 53.37483000, -6.36336000.
To call Castleknock, Ireland, you need to dial the international code +353 followed by the local number.
The currency used in Castleknock, Ireland is Euro (EUR). The currency symbol is .
The nearest major city to Castleknock is Leinster, approximately 0 km away.
You can verify Castleknock postal codes on PostalZipCode.co. Enter the postal code in the search bar to see its location, district, and city details.
Nearby Locations
City State Distance Latitude Longitude
Blanchardstown Leinster 2 km 53.388 -6.376
Chapelizod Leinster 3 km 53.348 -6.343
Palmerstown Leinster 3 km 53.35 -6.378
Ballyfermot Leinster 4 km 53.343 -6.355
Cherry Orchard Leinster 4 km 53.336 -6.378
Cabra Leinster 5 km 53.367 -6.294
Finglas Leinster 5 km 53.389 -6.297
Hartstown Leinster 5 km 53.393 -6.427
Clondalkin Leinster 6 km 53.324 -6.397
Glasnevin Leinster 6 km 53.379 -6.28
Other Ireland in States
State Distance Latitude Longitude
Dublin 7 km 53.35 -6.26
Meath 32 km 53.606 -6.656
Kildare 35 km 53.212 -6.819
Wicklow 43 km 52.986 -6.367
Louth 62 km 53.925 -6.489
Castleknock in Other Languages
Postal Codes by Country
Country Distance Latitude Longitude
Isle of Man 156 km 54.25 -4.5
United Kingdom 296 km 54 -2
Guernsey and Alderney 507 km 49.467 -2.583
Jersey 543 km 49.25 -2.167
Belgium 761 km 50.833 4
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Last updated: April 2026
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