The List of Postcodes by County file is a compiled extract from the Royal Mail's Postcode
Address File (PAF), Postcode Administration tables and Ordnance Survey's CodePoint
OpenData. We have merged the data to create this Postcode to County lookup table. The file
is updated every quarter.
When you order the List of Postcodes by County file you receive a text based list of
all 1.9 million UK Postcodes falling within the appropriate County.
If you require a fully structured address file including house number, street name, town
you will need the Royal Mail's
Postcode Address File (PAF),
List of Postcodes by County Applications
The list of Postcodes by County list is ideal
for relating Postcodes and address information to their relevant
Traditional Administrative County. The data is therefore essential for
allocating customers or sales leads to sales areas which are defined
by County or for assessing demand for County based local services.
- Field 1, Fully Structured Postcode - e.g. B76 1PH
- Field 2, Traditional County Name - e.g. Warwickshire
- Field 3, Administrative County/ Unitary Authority Name -
The list of Postcodes by County covers the
United Kingdom (England, Scotland, Wales and Northern Ireland)
The list of Postcodes by County 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 List of Postcodes by County 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 list of Postcodes by County 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.
More Detail about the
List of Postcodes
by County Lookup table
Each Postcode Area comprises one or two alpha characters
generally chosen to as an extract from the area name e.g. B for Birmingham,
CF for Cardiff, CV Coventry etc. In total the UK comprises of one hundred
and twenty four postcode areas.
Each Postcode Area is made up of dozens of Postcode
Districts represented by the first one or two numbers immediately following the postcode
area. B7, CV21, SL16 etc. The
district's numbers range from 0 to 99. In London a further alpha character is used to
divide some London districts into sub divisions (suffixes) e.g. EC1A. There
are 2,827 postcode districts.
Sectors are numbered 0-9. It should be noted that when sorting
postcodes into order, sector 0 is the tenth sector rather than the first! There are
9,487 postcode sectors in the UK.
Counties are no longer required or used by the Royal Mail Post
Office service as part of a correct postal / delivery address.
The Traditional County is the county name
most recognised and most used by the public even though the county names technically no
longer exist – examples include Berkshire, Middlesex, Yorkshire. This county field is most
useful for public facing website applications where users are requested to select a County
for an address etc.
The Administrative County provides the
latest county name for each postcode based upon administrative geography. This field
includes unitary authorities where applicable, for example York is within the unitary
authority (administrative county) of ‘York’ but in the (Traditional) County of
Whilst these county definitions are no longer maintained by Royal Mail or Ordnance Survey,
we have applied geographic analysis to the data to ensure that every Postcode is allocated
to a County.