Guernsey Address Format
UK-style layout: recipient, street, locality (town or parish), postcode on its own line, then GUERNSEY as the country line for international mail. No county line is used; the parish doubles as the locality. GUERNSEY is also the official post town for all GY districts, so some mailers write it above the postcode instead of the parish.
Standard format
Postcode rules
| Field name | Postcode |
|---|---|
| Format | GYN NAA or GYNN NAA (N = digit, A = letter) |
| Example | GY1 1AA |
| Pattern | ^GY(?:[1-9]|10) \d[A-Z]{2}$ |
| Rule | Guernsey uses the UK postcode system: the GY area with districts GY1-GY9 plus GY10 (Sark). GY1 = St Peter Port (Herm: GY1 3HR), GY9 = Alderney, GY10 = Sark. Written as one block after the locality, space before the last three characters. |
Fields used in Guernsey
| State / region | No |
|---|---|
| Street address | Yes |
| P.O. Box | Yes — "PO Box" locally |
FAQ
What is the Postcode format in Guernsey?
The format is GYN NAA or GYNN NAA (N = digit, A = letter), for example GY1 1AA. Guernsey uses the UK postcode system: the GY area with districts GY1-GY9 plus GY10 (Sark). GY1 = St Peter Port (Herm: GY1 3HR), GY9 = Alderney, GY10 = Sark. Written as one block after the locality, space before the last three characters.
How do you write an address in Guernsey?
Guernsey addresses are written from the smallest unit to the largest. UK-style layout: recipient, street, locality (town or parish), postcode on its own line, then GUERNSEY as the country line for international mail. No county line is used; the parish doubles as the locality. GUERNSEY is also the official post town for all GY districts, so some mailers write it above the postcode instead of the parish.
Does Guernsey use postal codes?
Yes. Guernsey uses the Postcode in the format GYN NAA or GYNN NAA (example: GY1 1AA). Guernsey uses the UK postcode system: the GY area with districts GY1-GY9 plus GY10 (Sark). GY1 = St Peter Port (Herm: GY1 3HR), GY9 = Alderney, GY10 = Sark. Written as one block after the locality, space before the last three characters.
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Sources
- https://www.guernseypost.com/
- https://www.upu.int/UPU/media/upu/documents/PostCode/ManualAddressing.pdf