Postal counties of the United Kingdom

The postal counties of the United Kingdom, now known as former postal counties,[1] were postal subdivisions in routine use by the Royal Mail until 1996.[2] The purpose of the postal county – as opposed to any other kind of county – was to aid the sorting of mail by differentiating between like-sounding post towns. Since 1996 this has been done by using the outward code (first half) of the postcode instead. For operational reasons the former postal counties, although broadly based on the counties of the United Kingdom, did not match up with their boundaries: in some cases there were significant differences. The boundaries changed over time as post towns were created or amended.

Postal county
Also known as:
Former postal county
CategoryPostal geography
LocationUnited Kingdom
CreatedMajor revision 1974
Number116 (as of 1996)
Possible typesEngland (48)
Northern Ireland (6)
Scotland (54)
Wales (8)
SubdivisionsPost town

According to the Royal Mail, the former postal county data no longer forms part of postal addresses. It was removed from the Postcode Address File database in 2000 and does not form part of its code of practice for changing addresses.[3] Despite this, county data is routinely sold to companies, ostensibly to let them cleanse their own address data. As the former postal county data was the last to be in routine use, some organisations have continued to use this obsolete data as part of postal addresses. In 2009 the Royal Mail code of practice consultation included discussion of the possible replacement of the currently supplied 'alias data' with an up-to-date county information data field.[4] In 2010 the regulator advised Royal Mail to cease supply of county data altogether[5] and a timetable was put in place for this to occur between 2013 and 2016.[6]


Counties were used in postal addresses from the earliest days of the Post Office, but over time the postal counties of many places did not match geographic counties or counties used for administrative purposes. There were several reasons for this:

Places part of a post town in another county

First, many of the approximately 1,500 post towns straddled county boundaries, and the postal addresses of all places in such areas included the postal county of the post town, regardless of their actual location. In a written answer in the House of Lords in 1963, Lord Chesham, Parliamentary Secretary at the Ministry of Transport estimated that about 7% of towns and villages with a post office lay in a postal county different from their geographical county. He went to explain that:

Postal addresses are in effect routing instructions for Post Office sorters and, in settling what they should be, the main concern is to ensure a quick and efficient service at reasonable cost. The general aim is to align postal boundaries with those of the counties and where this has not been done it is usually because road and rail communications are such that mail can be got more quickly and efficiently to and from certain villages, et cetera, via a neighbouring county than via the county in which they are situated. Alignment of postal and county boundaries in these instances would mean either a poorer postal service for the villages, et cetera, in question or prohibitively heavy additional costs.

John Cavendish, 5th Baron Chesham, Parliamentary Secretary at the Ministry of Transport written answer to Parliamentary question[7]

Examples, usually consisting of small villages near to county boundaries, included:

Geographic localityGeographic countyPost townFormer postal county
ChirburyShropshire (England)MONTGOMERYPowys (Wales)
Hinwick and PodingtonBedfordshireWELLINGBOROUGHNorthamptonshire
PitstoneBuckinghamshireLEIGHTON BUZZARDBedfordshire
Ugley and Molehill GreenEssexBISHOP'S STORTFORDHertfordshire
Woodcote and Sonning CommonOxfordshireREADINGBerkshire[notes 1]

There were additional examples resulting from the 1974 reorganisation of local government:

Geographic localityCeremonial countyPost townFormer postal county
BirtleyTyne and WearCHESTER LE STREETCounty Durham
Coleshill and Water OrtonWarwickshireBIRMINGHAMWest Midlands[notes 1]
Seaton Delaval[9]NorthumberlandWHITLEY BAYTyne and Wear[notes 2]
SedgefieldCounty DurhamSTOCKTON-ON-TEESCleveland
Stokesley and Great AytonNorth YorkshireMIDDLESBROUGHCleveland

The postal counties were subject to change over time as post towns near to county boundaries were amended. For example, Chinley in Derbyshire had a postal address of "Stockport, Cheshire"[10] which was later updated to "High Peak, Derbyshire" when a new post town was created.


London postal district shown (in red) against the Greater London boundary
Middlesex former postal county

Second, the London postal district, which formed a special post town, did not conform to any administrative boundaries. The postal district was created in 1858 and has periodically been revised. However, at no point has its boundary coincided with either the metropolis (later County of London) of 1855–1965, which was somewhat smaller, or the Greater London area created in 1965, which was much bigger. Addresses in the London post town, an area of 241 square miles (620 km2)[11] (or 40% of Greater London), did not include a county; however, the rest of Greater London (60% of its area) formed parts of other post towns in the postal counties of Surrey, Kent, Essex, Middlesex and Hertfordshire. For example, Wembley Stadium had a postal address of Wembley, Middlesex rather than London. Some London boroughs were split between multiple postal counties: for example Barnet had sections in the London postal district (e.g. Golders Green) and in the Middlesex and Hertfordshire postal counties (e.g. Edgware and East Barnet); with the NW7 postcode district touching the Greater London boundary to divide the three sections. Sewardstone, in the Epping Forest district of Essex, is the only locality outside Greater London to be included in the London postal district (E4).

Changes to geographic county boundaries

Third, the Royal Mail adopted some, but not all, of the local government reforms of 1965 and 1974/5. This caused postal counties in some areas to reflect boundary changes, while in other areas they did not. Although the Post Office did not follow the changes of the London Government Act 1963 with respect to the outer London suburbs, it did reflect the move of Potters Bar from Middlesex to Hertfordshire. In contrast, Middlesex remained part of the postal address for Staines, Sunbury and Ashford, which had transferred to Surrey. The 1960s saw an increase in the number of addresses the Post Office delivered to, but a decrease in the volume of mail sent, which caused a significant drop in revenue and a proportionate increase in operational costs.[12] Furthermore, retaining the existing postal county boundaries was explained as largely due to cost reasons. The Times pointed out that this might cause confusion, noting that in future "children will no doubt wonder why their address should refer to a county in which they have never lived", but that "some people […] want the name of Middlesex preserved because of its historical associations".[13]

The Local Government Act 1972 redrew the county map of England and Wales outside Greater London. The Post Office was considering its policy in January 1973,[14] and in November 1973 noted that "Greater Manchester" would be unlikely to be adopted because of confusion of the Manchester post town, but that Avon was likely to be introduced.[15] When the local government changes came into force, the Post Office announced that the new counties would form part of postal addresses from 1 July 1974, and should be used as "soon as possible". Old counties could, however, still be used until 1 July 1975. It was stated that the rule applied to: "...addresses throughout England and Wales outside Greater London with the exception of Greater Manchester and Hereford and Worcester where addresses remain unchanged. In Humberside it is necessary to show whether an address is in North Humberside or South Humberside. Addresses in certain post-towns have not, in the past, included a county name; these addresses are unchanged, but the postcode should be shown. Addresses in Greater London are also unchanged as are addresses in any place where the new county bears the same name as the former one."[16] The postal counties listed in 1961 that did not continue after the reforms were Cumberland, Rutland, Sussex, Westmorland and Yorkshire.[10]

In Scotland, counties were entirely abolished for local government purposes in May 1975. The matter of postal counties was raised in the House of Lords in April 1975. Lord Beswick, Minister of State at the Department of Industry, stated that "the Post Office is consulting its customers in Scotland about the possible use of new postal addresses for Scotland based on the new local government Regions and Island Areas".[17] In the event, the postal counties were not changed. Thus Alva, despite being in the Central Region after 1975, was still postally in Clackmannanshire. Gordon Oakes, Parliamentary Under Secretary of State at the Department of the Environment, explained the policy in a written answer to a question in parliament, shortly after the changes were brought in:[18]

Postal addresses are routing instructions, not geographical descriptions, and the extent to which the new county names are being adopted for mail has been the subject of advice issued by the Post Office.

Special post towns

The postal county was omitted for addresses within 110 post towns. These were mainly either larger towns and cities or places where the county name was derived from the post town. These post towns were:

  • AYR
  • BATH
  • HULL
  • YORK

The towns of BRECON, CAERNARVON, CARDIGAN, CARMARTHEN, DENBIGH, FLINT, HUNTINGDON, MONMOUTH, MONTGOMERY and PEMBROKE also qualified as special post towns until 1974 as the name of the county was derived from the town. Following the Local Government Act 1972, addresses in these towns required the new postal county.

Postal counties in operation from 1974 to 1996

listed with official abbreviations, if any


Postal counties broadly matched the county boundaries established in 1974, unless noted otherwise under "geographic coverage".

Former postal county Abbreviation[19] Geographic coverage Map
CheshireSignificant differences from the county boundaries established in 1974; also extended into Greater Manchester6
County DurhamCo Durham9
CumbriaAlso extended into Northumberland and Dumfries & Galloway10
East SussexE Sussex14
EssexSignificant differences from the county boundaries established in 1974; also extended into Greater London;[20] Stansted post town (CM24 postcode) is an exclave of the Essex postal county wholly within the Hertfordshire postal county15
HerefordshireCovered part of Hereford and Worcester; also extended into Powys.18
HertfordshireHertsSignificant differences from the county boundaries established in 1974; also extended into Greater London[20]19
Isle of Wight20
KentAlso extended into Greater London[20]21
LancashireLancsSignificant differences from the county boundaries established in 1974; also extended into Cumbria, Greater Manchester, North Yorkshire and West Yorkshire22
LondonNot a postal county, but the London postal district corresponded to the London post town[20]25
MiddlesexMiddxCovered parts of Greater London and Surrey; Enfield post town was an exclave, separated from the rest by the London postal district and Hertfordshire[20]27
North HumbersideN HumbersideCovered part of Humberside29
North YorkshireN Yorkshire30
NorthumberlandNorthdSignificant differences from the county boundaries established in 1974; consisted of two unconnected areas divided by Tyne & Wear (NE19 postcode)32
South HumbersideS HumbersideCovered part of Humberside37
South YorkshireS Yorkshire38
SurreySignificant differences from the county boundaries established in 1974; also extended into Greater London[20] and did not include Spelthorne (included in Middlesex)41
Tyne and WearTyne & WearSignificant differences from the county boundaries established in 1974; long salient into Northumberland all the way to the Scottish border (NE19 postcode)42
WarwickshireWarksSignificant differences from the county boundaries established in 1974; consisted of two unconnected areas divided by West Midlands (i.e. the easterly salient of the Coventry post town)43
West MidlandsW MidlandsSignificant differences from the county boundaries established in 1974; extended into Warwickshire all the way to the Leicestershire border (CV7 postcode)44
West SussexW Sussex45
West YorkshireW Yorkshire46
WorcestershireWorcsCovered part of Hereford and Worcester48


The postal counties of Scotland broadly followed the boundaries of the civil counties on the mainland. Offshore islands, however, were regarded as distinct counties for postal purposes. There was no postal county of Buteshire, which was instead divided between the Isles of Arran, Bute and Cumbrae.

Former postal county Geographic coverage Map
AberdeenshireApproximated to pre-1975 county less Aberdeen post town49
AngusApproximated to pre-1975 county less areas in Dundee post town50
ArgyllApproximated to pre-1975 county less islands51
AyrshireApproximated to pre-1975 county52
BanffshireApproximated to pre-1975 county53
BerwickshireApproximated to pre-1975 county54
CaithnessApproximated to pre-1975 county55
ClackmannanshireApproximated to pre-1975 county56
DumfriesshireApproximated to pre-1975 county57
DunbartonshireApproximated to pre-1975 county, comprising two separate areas58
East LothianApproximated to pre-1975 county59
FifeApproximated to pre-1975 county60
Inverness-shireApproximated to pre-1975 county less islands61
Isle of Arran62
Isle of Barra63
Isle of Benbecula64
Isle of Bute65
Isle of Canna66
Isle of Coll67
Isle of Colonsay68
Isle of Cumbrae69
Isle of Eigg70
Isle of Gigha71
Isle of Harris72
Isle of Iona73
Isle of Islay74
Isle of Jura75
Former postal county Geographic coverage Map
Isle of Lewis76
Isle of Mull77
Isle of North Uist78
Isle of Rum79
Isle of Scalpay80
Isle of Skye81
Isle of South Uist82
Isle of Tiree83
KincardineshireApproximated to pre-1975 county84
Kinross-shireApproximated to pre-1975 county85
KirkcudbrightshireApproximated to pre-1975 county86
LanarkshireApproximated to pre-1975 county less areas in Glasgow post town87
MidlothianApproximated to pre-1975 county less Edinburgh post town88
MorayshireApproximated to pre-1975 county89
NairnshireApproximated to pre-1975 county90
OrkneyCovered pre-1975 county and modern islands area91
PeeblesshireApproximated to pre-1975 county92
PerthshireApproximated to pre-1975 county less areas in Dundee post town93
RenfrewshireApproximated to pre-1975 county94
Ross-shireApproximated to pre-1975 county of Ross and Cromarty less islands95
RoxburghshireApproximated to pre-1975 county96
SelkirkshireApproximated to pre-1975 county97
ShetlandCovered pre-1975 county of Zetland and modern islands area of Shetland98
StirlingshireApproximated to pre-1975 county99
SutherlandApproximated to pre-1975 county100
West LothianApproximated to pre-1975 county101
WigtownshireApproximated to pre-1975 county102


Former postal county Abbreviation[19] Geographic coverage Map
ClwydBroadly matched the county boundaries established in 1974103
Mid GlamorganM Glam107
South GlamorganS Glam108
West GlamorganW Glam110

Northern Ireland

Former postal county Abbreviation[19] Map
County AntrimCo Antrim111
County ArmaghCo Armagh112
County DownCo Down113
County FermanaghCo Fermanagh114
County LondonderryCo Londonderry115
County TyroneCo Tyrone116

Normally, counties in Northern Ireland are named with the word 'County', and not simply the county name, perhaps to avoid confusion with the towns of the same name.

After 1996

Postcode defined circulation

The Royal Mail ceased to use postal counties as a means of sorting mail following the modernisation of their optical character recognition equipment in 1996. Instead, using postcode defined circulation, the outward code (first half) of the postcode is used to differentiate between like-sounding post towns. In 2000 the postal county data was removed from the Postcode Address File database and was added to the Alias File, which is used to cleanse data of local, colloquial and "postally-not-required" details that have been added to addresses. According to Royal Mail policy the field is not updated and where new post towns are created they will not be assigned to a former postal county. In guidance to customers it is required that the correct post town and postcode must be included in addresses and a county is not required.[21] As part of a "flexible addressing policy" customers can add a county, which will be ignored in the sorting process.

1990s local government reform

During the 1990s a reform of local government in England caused further changes to the locations in which the former postal counties did not match up to the geographic counties. Avon, Cleveland and Humberside were abolished as geographic counties and Rutland was reconstituted. This had the following effects on the relationship between the geographic and postal counties:

Former postal county Coverage
AvonBristol, Somerset (part), Gloucestershire (part)
ClevelandCounty Durham (part), North Yorkshire (part)
North HumbersideEast Riding of Yorkshire
South HumbersideLincolnshire (part)
Leicestershire (part)Rutland

Hereford and Worcester was abolished and reconstituted as two separate counties once more, broadly matching the former postal counties. Greater London and Greater Manchester remained unaffected by the reform. Local government was also reorganised in 1996 in both Scotland (Local Government etc. (Scotland) Act 1994) and Wales (Local Government (Wales) Act 1994), such that in some places counties reverted to the historic names once again (e.g. Pembrokeshire),[2] but in others the post-1974 names were retained (e.g. Powys and Gwynedd). As the Royal Mail had also declared postal counties redundant in 1996, the former postal county data was not updated to reflect these changes.

Extended usage

Despite Royal Mail stipulating that counties no longer form part of addresses, many organisations have continued routinely to include them as part of postal addressing, often simply combining Postcode Address File data with the data from the Alias File. Some organisations using software which requires a county to be included as part of a postal address have extended the use of counties to addresses in special post towns, which never needed them.

This continued use has caused customers in areas where there is discrepancy between the postal and geographic counties to complain to Royal Mail. Until 2007 the Royal Mail position was that under their current code of practice, changes to county data will not be considered.[3][21] However, after a lengthy and well-organised campaign,[22] the Royal Mail agreed to create a postal county of Rutland in 2007. This was achieved in January 2008 by amending the former postal county for all of the Oakham (LE15) post town and part of the Market Harborough (LE16) post town.[23] In contrast, Seaton Delaval residents had unsuccessfully campaigned in 2004 to be removed from the former postal county of Tyne and Wear.[9]

In 2009 the Royal Mail code of practice came up for renewal, and the regulator Postcomm held a public consultation on its future. Consultation guidance from the regulator indicated that although the former postal county data is obsolete, it was the last available data set to be in routine use and was therefore the most likely to be used by corporate customers for their address databases.[4] It was also recognised that residential customers in some areas were not happy with this situation. The Royal Mail reconfirmed its preference for eliminating counties altogether from addressing, but also invited comments on providing a new and updated county data field, reflecting boundary changes. Postcomm found that many respondents objected to the use of obsolete counties. In May 2010 Postcomm decided to advise Royal Mail to "discontinue provision of such information at the earliest opportunity". However, because some existing software included the use of counties, Royal Mail was advised not to implement the change before 2013.[5] The timetable announced by Royal Mail in July 2010 indicated that this was likely to happen between 2013 and 2016.[6]

In 2013 Felicity MacFarlane stated the Royal Mail position:[24]

As we have stressed for a number of years, Royal Mail's Postcode Address File does not contain county names as they are not required for postal purposes. However, we do make a list of historical county names available to customers to reference if they wish though we don't encourage external organisations to use or rely on the county information.

Between November and December 2013 a further consultation on the issue was conducted by the PAF Advisory Board that sought opinions on removing some or all of the county data from the Alias File[25] and the results were published in January 2014.[26]


  1. Because the post town was a special post town, the postal county was not required.
  2. The postal county was Northumberland before 1974.


  1. Royal Mail Programmers' Guide, Edition 7, version 5.0, Royal Mail Group Ltd, 2009, p.65
  2. "Pembrokeshire (Royal Mail Database) c218WH". Hansard. 23 June 2009. Retrieved 23 July 2009.
  3. Royal Mail, Postcode Address File Code of Practice[permanent dead link], (2004)
  4. Postcomm, Review of Royal Mail's Postcode Address File Code of Practice Consultation Archived 3 September 2009 at the Wayback Machine, 28 May 2009
  5. "Changes to postcode address file Code of Practice under Condition 22 of Royal Mail's licence: A decision document" (PDF). Postal Services Commission (Postcomm). May 2010. Archived from the original (PDF) on 20 July 2011. Retrieved 12 June 2010.
  6. Hope, Christopher (31 July 2010). "Counties to be axed from postal addresses". The Daily Telegraph. London. Retrieved 2 August 2010.
  7. "Alignment of postal and county boundaries (HL Deb 15 July 1963 vol 252 c108WA)". Hansard. 15 July 1963. Retrieved 10 June 2007.
  8. Residents in postcode row Archived 14 October 2008 at the Wayback Machine, BBC News, 27 June 2002
  9. "Villagers address their concerns". BBC News. 30 October 2004.
  10. General Post Office (October 1961). Postal Addresses. HMSO.
  11. HMSO, The Inner London Letter Post, (1980)
  12. Corby, M., The postal business, 1969–79, (1979)
  13. "G.P.O. To Keep Old Names. London Changes Too Costly". The Times. 12 April 1966.
  14. "Changes in local government units may cause some famous names to disappear". The Times. 2 January 1973.
  15. "Post Office will ignore some new counties over addresses". The Times. 26 November 1973.
  16. "Local Government Reorganisation and Postal Addresses". Local Government in England and Wales: A Guide to the New System. HMSO. 1974. p. 185. ISBN 0-11-750847-0.
  17. "Argyll: Postal Address". Hansard 1803 – 2005. Parliament of the United Kingdom. 9 April 1975. Retrieved 10 March 2009.
  18. House of Commons Hansard, Written Answers, 4 July 1974, col.278
  19. Royal Mail, PAF Digest Issue 6.0[permanent dead link]
  20. Geographers' A-Z Map Company (2008). London Postcode and Administrative Boundaries (6 ed.). Geographers' A-Z Map Company. ISBN 978-1-84348-592-6.
  21. Royal Mail, Address Management Guide, (2004)
  22. MP wins seven-year postal address battle Archived 17 May 2008 at the Wayback Machine, Stamford Mercury, 5 November 2007.
  23. AFD Software, Latest PAF data news
  25. "The Provision of County Information in PAF" (PDF). PAF Advisory Board. 4 November 2013. Archived from the original (PDF) on 5 March 2016. Retrieved 27 January 2014.
  26. "Counties Consultation results" (PDF). PAF Advisory Board. 13 January 2014. Archived from the original (PDF) on 24 September 2015. Retrieved 27 January 2014.