Postcode GY4
St Martin · Guernsey Channel Islands, Other areas
GY4 is the postcode of St Martin in Guernsey Channel Islands, Other areas, United Kingdom. This list covers outward codes — the first half of a UK postcode, such as M9 or BN91 — not full postcodes.
- Postcode
- GY4
- County
- Guernsey Channel Islands
- Country
- Other areas
- Country
- United Kingdom
Place with postcode GY4
| Place | County | Location |
|---|---|---|
| St Martin | Guernsey Channel Islands | 49.437, -2.555 |
Nearby postcodes
Frequently asked questions
Which places use postcode GY4?
St Martin.
Which county and country is GY4 in?
Guernsey Channel Islands, Other areas, United Kingdom.
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.