United Kingdom Address Format
UK addresses go from smallest unit to largest: recipient, house number + street, post town, then the postcode alone on the last line. A county line is optional and not required by Royal Mail; PO Box addresses replace the street line.
Standard format
Postcode rules
| Field name | Postcode |
|---|---|
| Format | AN NAA, ANN NAA, AAN NAA, or AANN NAA (N = digit, A = letter) |
| Example | SW1A 1AA |
| Pattern | ^[A-Za-z]{1,2}\d[A-Za-z\d]?\s?\d[A-Za-z]{2}$ |
| Rule | Alphanumeric: an outward code (1-2 letters + 1-2 digits/letters, e.g. SW1A) and an inward code (digit + 2 letters, e.g. 1AA), separated by a space. |
Fields used in United Kingdom
| State / region | No |
|---|---|
| Street address | Yes |
| P.O. Box | Yes — "PO Box" locally |
FAQ
What is the Postcode format in United Kingdom?
The format is AN NAA, ANN NAA, AAN NAA, or AANN NAA (N = digit, A = letter), for example SW1A 1AA. Alphanumeric: an outward code (1-2 letters + 1-2 digits/letters, e.g. SW1A) and an inward code (digit + 2 letters, e.g. 1AA), separated by a space.
How do you write an address in United Kingdom?
United Kingdom addresses are written from the smallest unit to the largest. UK addresses go from smallest unit to largest: recipient, house number + street, post town, then the postcode alone on the last line. A county line is optional and not required by Royal Mail; PO Box addresses replace the street line.
Does United Kingdom use postal codes?
Yes. United Kingdom uses the Postcode in the format AN NAA, ANN NAA, AAN NAA, or AANN NAA (example: SW1A 1AA). Alphanumeric: an outward code (1-2 letters + 1-2 digits/letters, e.g. SW1A) and an inward code (digit + 2 letters, e.g. 1AA), separated by a space.
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Sources
- https://www.royalmail.com/find-a-postcode
- https://www.upu.int/UPU/media/upu/documents/PostCode/ManualAddressing.pdf