Post town (United Kingdom postal addressing)

Role in an address

In typical UK addressing the post town appears on a line after the street and any locality information and directly before the postcode. A complete address commonly follows this order: addressee, building number or name, street, locality (optional), post town, postcode. The post town helps human and machine sorters group deliveries at a local level, working together with the postcode, which now provides much finer geographic resolution.

History and development

The system of post towns predates modern postcodes. As the national postal network developed in the 19th century, the Post Office organised delivery into towns and districts to improve efficiency. With the later introduction of postcodes in the mid‑20th century, automated sorting reduced reliance on town names, but the post town remained part of the standard format. Postal counties and other legacy elements were phased out in the 1990s, while the list and extent of post towns continue to be maintained by the postal operator (Royal Mail).

Characteristics and common issues

Post town boundaries are set for operational convenience and do not always match local government boundaries or community identities. A single post town can cover many villages and suburbs; conversely, large cities may be divided into multiple post towns or use a single city name for many postcode districts. This mismatch occasionally creates confusion or local sensitivity when residents prefer a different place name than the postal one.

Practical significance and guidance

For everyday use, the postcode is the primary key for delivery, but including the correct post town remains important for manual sorting, mail redirects and some forms. When completing an address, follow the postal operator's recommended format and use the post town that matches the postcode to avoid delays. Businesses and public services often rely on post towns for area categorisation, customer records and mapping, so consistent use improves accuracy.

Notable points

• Post towns are operational areas defined by the postal operator and are not administrative units.
• They are typically written in capital letters in many addressing guides.
• Although postcodes do most of the sorting work today, post towns remain part of the formal address structure.