Guernsey Postal Codes
Guernsey uses postal codes in the format @# #@@ or @## #@@ or @@# #@@ or @@## #@@ or @#@ #@@ or @@#@ #@@ or GIR0AA (# = digit, @ = letter).
10 postal codes are recorded for Guernsey in the open data sources below.
Example postal codes
GY1 1AAGY2 2BT
Postal codes by place
The 13 places in Guernsey with the most postal codes recorded, listed alphabetically. Larger towns link to their own page.
| Place | Postal code | Codes recorded |
|---|---|---|
| Alderney | GY9 | 1 |
| Castel | GY5 | 1 |
| Delancey | GY2 | 1 |
| Forest | GY8 | 1 |
| Saint Andrew | GY6 | 1 |
| Saint Pierre du Bois | GY7 | 1 |
| Saint Saviour | GY7 | 1 |
| Sark | GY10 | 1 |
| St Martin | GY4 | 1 |
| St Peter Port | GY1 | 1 |
| St Sampsons | GY2 | 1 |
| Torteval | GY8 | 1 |
| Vale | GY3 | 2 |
How an address is written in Guernsey
This is the order Guernsey's postal service expects. Square brackets mark what you replace.
[Recipient name]
[Street address]
[City]
GUERNSEY
[Postal code (GY1 1AA)]
GUERNSEY
A postal code is required in a complete Guernsey address. The postal code should be written in capital letters.
Look up a specific address
For the code covering one particular street or building, Guernsey's postal service publishes an official finder: www.guernseypost.com/postcode_finder. It is authoritative and kept current, which third-party copies often are not.
Country reference
| ISO 3166-1 alpha-2 | GG |
|---|---|
| ISO 3166-1 alpha-3 | GGY |
| Capital | St Peter Port |
| Telephone code | +44-1481 |
| Currency | Pound (GBP) |
| Internet TLD | .gg |
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.
Postal codes by town and city
13 places in Guernsey have a recorded postal code. The 0 largest have their own page; the rest are listed alphabetically.