County Down County Postcodes
Northern Ireland, United Kingdom · 12 codes
County Down County in Northern Ireland has 12 postcodes, from BT18 to BT4, serving 61 places.
Postcodes in County Down
| Postcode | Places |
|---|---|
| BT18 | Craigavad, Holywood |
| BT19 | Crawfordsburn, Groomsport, Helens Bay |
| BT22 | Ardkeen, Ballyhalbert, Ballywalter, Carrowdore, Cloughey, Greyabbey +4 more |
| BT24 | Drumaness, Saintfield |
| BT25 | Annahilt, Culcavy, Dromara, Dromore, Finnis, Waringsford |
| BT27 | Hillhall |
| BT30 | Ardglass, Ballyhornan, Ballykinler, Castleward, Clough, Crossgar +8 more |
| BT31 | Ballyward |
| BT32 | Annaclone, Ballinaskeagh, Ballyroney, Corbet, Katesbridge, Lenaderg +2 more |
| BT33 | Bryansford, Dundrum |
| BT34 | Annalong, Ballymartin, Cabra, Hilltown, Kilcoo, Kilkeel +5 more |
| BT4 | Stormont |
Frequently asked questions
What is the postcode of County Down?
County Down has 12 postcodes, from BT18 to BT4. The table lists the places each one serves.
How many places are listed in County Down County?
61 places.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.