Postcode Locality


The very latest list of postcode locality file containing "Postal Required" and "Postal Not Required" locality names across the UK..

Localities are geographic place names which have no physical boundary defined but are used locally to differentiate different areas of the same larger town. Royal Mail do not require the use of all Locality names in the UK for the effective delivery of Post, however locals and visitors to an area will know and refer to these place names often.  These place names are often seen on maps and signs.

To illustrate, the Full Postcode database shows which Postally Required Locality each Postcode belong to, for example "Littlewick Green", "Burchetts Green" and "White Waltham" in Postcodes starting with SL6 3. The Postcode Sector list also shows these but also shows 11 additional Postally Not Required Localities for the Sector SL6 3 including places such as Holloway, Maidenhead Thicket, Woodlands Park, Littlefield Green and so on.

In total these files relate the UK Postcode geography to over 45,000 commonly used Locality names.

Postcode Locality List Applications

The Postcode to Locality list is ideal for relating Postcodes and address information to their relevant Traditional Administrative Locality. The data is therefore essential for allocating customers or for sales leads to sales areas which are defined by Locality or for assessing demand for Locality based local services.

Fields / Files

File 1) In the Full Postcode Locality List:

    • Postcode
    • Postcode District
    • Postcode Area
    • Double Dependent Locality
    • Dependent Locality
    • Post Town

File 2) In the Postcode Sector List

  • Postcode Sector
  • Postcode District
  • Postcode Area
  • Locality
  • Locality Type


The Postcode Locality List covers the United Kingdom (England, Scotland, Wales and Northern Ireland)

Supply Format

The Postcode Locality List is supplied as a Comma Separated Variable (CSV) delimited text file using double quotes by default. This field format will open very easily using almost any software application including but not limited to Excel, Word, Notepad, Access, SQL etc.  Due to the size of the file, older versions of Excel may not be an option as Excel limits any file size to around 65,000 rows / records.


The Postcode Locality List is by default emailed at the time of order using a secure download link delivery method.  If you require the data supplied in another format then we will be more than happy to accommodate you where reasonable to do so at no extra cost.


The Postcode Locality List is licensed annually for each user that has access to it according to Royal Mail Terms and Conditions.


The file is updated every three months and free updates will be made available to you so long as your licence remains current.

Data Partnership - Royal Mail Postcode Address File Telephone Preference Service Mailing Preference Service Institute of Direct Marketing