ONS coding system
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The Office for National Statistics coding system is a hierarchical code used in the United Kingdom for tabulating census and other statistical data.
Contents
Authorities, wards, and census areas
The code is constructed top down from a 4 character code representing a unitary authority or administrative county & district, eg:
| 00EC | Middlesbrough (unitary) |
| or | |
|---|---|
| 12 | Cambridgeshire county |
| 12UB | Cambridge district |
Local Government wards have a two-letter code within their local authority, and Census Output Areas an additional 4 digits within a ward. Census Output Areas (OAs) are the smallest unit for which census data is published - they contain at least 40 households (preferably 100), and are built up from postcode blocks after the census data is available, with a view to being socially as homogeneous as possible. A new set of Output Areas will be created for each decennial census. Census 2001 was the first to use this system - previously census data was published for larger Enumeration Districts which were delineated before the census was conducted. Enumeration Districts are still used for the collection of data but not for publication.
| 12UB | Cambridge district |
| 12UBGA | Petersfield Ward |
| 12UBGA0001 | Output Area: Gwydir Street (north of junction with Hooper St) |
The authority and ward codes are recognised by Eurostat as Local administrative unit code levels 1 & 2 within the NUTS system.
Civil parishes
An overlapping system encodes Civil Parish areas. Parishes are represented by an additional 3 digits within their local authority:
| 12UD | Fenland district |
| 12UD010 | Tydd St. Giles parish |
Super Output Areas
Super Output Areas (SOAs) are a set of geographies developed after the 2001 census. The aim was to produce a set of areas of consistent size, whose boundaries would not change (unlike electoral wards). They are an aggregation of adjacent Output Areas with similar social characteristics. Lower Layer SOAs typically contain 4 to 6 OAs with a population of around 1500. Middle Layer SOAs on average have a population of 7,200. Upper Layer SOAs are still being calculated; they are expected to cover a population of at least 25,000 each.[1][2]
ONS codes for counties & districts
Also showing NUTS(3) codes thus: (UKH12)
Single-tier districts
- London
00AA (UKI11)City of London00AB (UKI21)Barking and Dagenham00AC (UKI23)Barnet00AD (UKI21)Bexley00AE (UKI23)Brent00AF (UKI22)Bromley00AG (UKI11)Camden00AH (UKI22)Croydon00AJ (UKI23)Ealing00AK (UKI21)Enfield00AL (UKI21)Greenwich00AM (UKI12)Hackney00AN (UKI11)Hammersmith and Fulham00AP (UKI12)Haringey00AQ (UKI23)Harrow00AR (UKI21)Havering00AS (UKI23)Hillingdon00AT (UKI23)Hounslow00AU (UKI12)Islington00AW (UKI11)Kensington and Chelsea00AX (UKI22)Kingston upon Thames00AY (UKI12)Lambeth00AZ (UKI12)Lewisham00BA (UKI22)Merton00BB (UKI12)Newham00BC (UKI21)Redbridge00BD (UKI23)Richmond upon Thames00BE (UKI12)Southwark00BF (UKI22)Sutton00BG (UKI12)Tower Hamlets00BH (UKI21)Waltham Forest00BJ (UKI11)Wandsworth00BK (UKI11)Westminster
- Greater Manchester districts
00BL (UKD32)Bolton00BM (UKD32)Bury00BN (UKD31)Manchester00BP (UKD32)Oldham00BQ (UKD32)Rochdale00BR (UKD31)Salford00BS (UKD31)Stockport00BT (UKD31)Tameside00BU (UKD31)Trafford00BW (UKD32)Wigan
- Merseyside districts
00BX (UKD51)Knowsley00BY (UKD52)Liverpool00BZ (UKD51)St Helens00CA (UKD53)Sefton00CB (UKD54)Wirral
- South Yorkshire districts
00CC (UKE31)Barnsley00CE (UKE31)Doncaster00CF (UKE31)Rotherham00CG (UKE32)Sheffield
- Tyne and Wear districts
00CH (UKC22)Gateshead00CJ (UKC22)Newcastle-upon-Tyne00CK (UKC22)North Tyneside00CL (UKC22)South Tyneside00CM (UKC23)Sunderland
- West Midlands districts
00CN (UKG31)Birmingham00CQ (UKG33)Coventry00CR (UKG34)Dudley00CS (UKG34)Sandwell00CT (UKG32)Solihull00CU (UKG35)Walsall00CW (UKG35)Wolverhampton
- West Yorkshire districts
00CX (UKE41)Bradford00CY (UKE43)Calderdale00CZ (UKE43)Kirklees00DA (UKE42)Leeds00DB (UKE43)Wakefield
- Unitary authorities - North East England region
00EB (UKC11)Hartlepool00EC (UKC12)Middlesbrough00EE (UKC12)Redcar and Cleveland00EF (UKC11)Stockton-on-Tees00EH (UKC13)Darlington
- Unitary authorities - North West England region
00ET (UKD21)Halton00EU (UKD21)Warrington00EX (UKD41)Blackburn with Darwen00EY (UKD42)Blackpool
- Unitary authorities - Yorkshire and the Humber region
00FA (UKE11)Kingston upon Hull00FB (UKE12)East Riding of Yorkshire00FC (UKE13)North East Lincolnshire00FD (UKE13)North Lincolnshire00FF (UKE21)York
- Unitary authorities - East Midlands region
00FK (UKF11)Derby00FN (UKF21)Leicester00FP (UKF22)Rutland00FY (UKF14)Nottingham
- Unitary authorities - West Midlands region
00GA (UKG11)Herefordshire00GF (UKG21)Telford and Wrekin00GL (UKG23)Stoke-on-Trent
- Unitary authorities - South West England region
00HA (UKK12)Bath and North East Somerset00HB (UKK11)Bristol00HC (UKK12)North Somerset00HD (UKK12)South Gloucestershire00HG (UKK41)Plymouth00HH (UKK42)Torbay00HN (UKK21)Bournemouth00HP (UKK21)Poole00HX (UKK14)Swindon
- Unitary authorities - East of England region
00JA (UKH11)Peterborough00KA (UKH21)Luton00KF (UKH31)Southend-on-Sea00KG (UKH32)Thurrock
- Unitary authorities - South East England region
00LC (UKJ41)Medway00MA (UKJ11)Bracknell Forest00MB (UKJ11)West Berkshire00MC (UKJ11)Reading00MD (UKJ11)Slough00ME (UKJ11)Windsor and Maidenhead00MF (UKJ11)Wokingham00MG (UKJ12)Milton Keynes00ML (UKJ21)Brighton and Hove00MR (UKJ31)Portsmouth00MS (UKJ32)Southampton00MW (UKJ34)Isle of Wight
- Welsh authorities
00NA (UKL11)Isle of Anglesey00NC (UKL12)Gwynedd00NE (UKL13)Conwy00NG (UKL13)Denbighshire00NJ (UKL23)Flintshire00NL (UKL23)Wrexham00NN (UKL24)Powys00NQ (UKL14)Ceredigion00NS (UKL14)Pembrokeshire00NU (UKL14)Carmarthenshire00NX (UKL18)Swansea00NZ (UKL17)Neath Port Talbot00PB (UKL17)Bridgend00PD (UKL22)Vale of Glamorgan00PF (UKL15)Rhondda Cynon Taff00PH (UKL15)Merthyr Tydfil00PK (UKL16)Caerphilly00PL (UKL16)Blaenau Gwent00PM (UKL16)Torfaen00PP (UKL21)Monmouthshire00PR (UKL21)Newport00PT (UKL22)Cardiff
- Scottish districts
00QA (UKM10)Aberdeen00QB (UKM10)Aberdeenshire00QC (UKM21)Angus00QD (UKM31/43)Argyll and Bute00QE (UKM24)Scottish Borders00QF (UKM22)Clackmannanshire00QG (UKM31)West Dunbartonshire00QH (UKM32)Dumfries and Galloway00QJ (UKM21)Dundee00QK (UKM33)East Ayrshire00QL (UKM31)East Dunbartonshire00QM (UKM23)East Lothian00QN (UKM35)East Renfrewshire00QP (UKM25)Edinburgh00QQ (UKM26)Falkirk00QR (UKM22)Fife00QS (UKM34)Glasgow00QT (UKM41/42/43)Highland00QU (UKM35)Inverclyde00QW (UKM23)Midlothian00QX (UKM10/42)Moray00QY (UKM33/43)North Ayrshire00QZ (UKM36)North Lanarkshire00RA (UKM45)Orkney Islands00RB (UKM27)Perth and Kinross00RC (UKM35)Renfrewshire00RD (UKM46)Shetland Islands00RE (UKM37)South Ayrshire00RF (UKM38)South Lanarkshire00RG (UKM27)Stirling00RH (UKM28)West Lothian00RJ (UKM44)Eilean Siar (Western Isles)
Two-tier counties & districts
01-07obsolete, were Greater London & the metropolitan counties08obsolete, was Avon08UBobsolete, was Bath08UCobsolete, was Bristol08UDobsolete, was Kingswood08UEobsolete, was Northavon08UFobsolete, was Wansdyke08UGobsolete, was Woodspring
09 (UKH22)Bedfordshire09UBobsolete, was Luton09UCMid Bedfordshire09UDBedford09UESouth Bedfordshire
10obsolete, was Berkshire10UBobsolete, was Bracknell Forest10UCobsolete, was Newbury10UDobsolete, was Reading10UEobsolete, was Slough10UFobsolete, was Windsor and Maidenhead10UGobsolete, was Wokingham
11 (UKJ13)Buckinghamshire11UBAylesbury Vale11UCChiltern11UDobsolete, was Milton Keynes11UESouth Bucks11UFWycombe
12 (UKH12)Cambridgeshire12UBCambridge12UCEast Cambridgeshire12UDFenland12UEHuntingdonshire12UFobsolete, was Peterborough12UGSouth Cambridgeshire
13 (UKD22)Cheshire13UBChester13UCCongleton13UDCrewe and Nantwich13UEEllesmere Port and Neston13UFobsolete, was Halton13UGMacclesfield13UHVale Royal13UJobsolete, was Warrington
14obsolete, was Cleveland14UBobsolete, was Hartlepool14UCobsolete, was Langbaurgh-on-Tees14UDobsolete, was Middlesbrough14UEobsolete, was Stockton-on-Tees
15 (UKK30)Cornwall and Scilly15UBCaradon15UCCarrick15UDKerrier15UENorth Cornwall15UFPenwith15UGRestormel15UHIsles of Scilly
16Cumbria16UB (UKD11)Allerdale16UC (UKD11)Barrow-in-Furness16UD (UKD12)Carlisle16UE (UKD11)Copeland16UF (UKD12)Eden16UG (UKD12)South Lakeland
17Derbyshire17UB (UKF13)Amber Valley17UC (UKF12)Bolsover17UD (UKF12)Chesterfield17UEobsolete, was Derby17UF (UKF13)Derbyshire Dales17UG (UKF13)Erewash17UH (UKF13)High Peak17UJ (UKF12)North East Derbyshire17UK (UKF13)South Derbyshire
18 (UKK43)Devon18UBEast Devon18UCExeter18UDMid Devon18UENorth Devon19UFobsolete, was Plymouth18UGSouth Hams18UHTeignbridge19UJobsolete, was Torbay18UKTorridge18ULWest Devon
19 (UKK22)Dorset19UBobsolete, was Bournemouth19UCChristchurch19UDEast Dorset19UENorth Dorset19UFobsolete, was Poole19UGPurbeck19UHWest Dorset19UJWeymouth and Portland
20 (UKC14)County Durham20UBChester-le-Street20UCobsolete, was Darlington20UDDerwentside20UEDurham20UFEasington20UGSedgefield20UHTeesdale20UJWear Valley
21 (UKJ22)East Sussex21UBobsolete, was Brighton21UCEastbourne21UDHastings21UEobsolete, was Hove21UFLewes21UGRother21UHWealden
22 (UKH33)Essex22UBBasildon22UCBraintree22UDBrentwood22UECastle Point22UFChelmsford22UGColchester22UHEpping Forest22UJHarlow22UKMaldon22ULRochford22UMobsolete, was Southend-on-Sea22UNTendring22UPobsolete, was Thurrock22UQUttlesford
23 (UKK13)Gloucestershire23UBCheltenham23UCCotswold23UDForest of Dean23UEGloucester23UFStroud23UGTewkesbury
24 (UKJ33)Hampshire24UBBasingstoke and Deane24UCEast Hampshire24UDEastleigh24UEFareham24UFGosport24UGHart24UHHavant24UJNew Forest24UKobsolete, was Portsmouth24ULRushmoor24UMobsolete, was Southampton24UNTest Valley24UPWinchester
25obsolete, was Hereford and Worcester25UBobsolete, was Bromsgrove25UCobsolete, was Hereford25UDobsolete, was Leominster25UEobsolete, was Malvern Hills25UFobsolete, was Redditch25UGobsolete, was South Herefordshire25UHobsolete, was Worcester25UJobsolete, was Wyre Forest25UKobsolete, was Wychavon
26 (UKH23)Hertfordshire26UBBroxbourne26UCDacorum26UDEast Hertfordshire26UEHertsmere26UFNorth Hertfordshire26UGSt Albans26UHStevenage26UJThree Rivers26UKWatford26ULWelwyn Hatfield
27obsolete, was Humberside27UBobsolete, was Boothferry27UCobsolete, was Cleethorpes27UDobsolete, was East Yorkshire27UEobsolete, was Beverley27UFobsolete, was Glanford27UGobsolete, was Holderness27UHobsolete, was Great Grimsby27UJobsolete, was Kingston upon Hull27UKobsolete, was Scunthorpe
28obsolete, was Isle of Wight county29UBobsolete, was Medina29UBobsolete, was South Wight
29 (UKJ42)Kent29UBAshford29UCCanterbury29UDDartford29UEDover29UFobsolete, was Gillingham29UGGravesham29UHMaidstone29UJobsolete, was Rochester upon Medway29UKSevenoaks29ULShepway29UMSwale29UNThanet29UPTonbridge and Malling29UQTunbridge Wells
30 (UKD43)Lancashire30UBobsolete, was Blackburn30UCobsolete, was Blackpool30UDBurnley30UEChorley30UFFylde30UGHyndburn30UHLancaster30UJPendle30UKPreston30ULRibble Valley30UMRossendale30UNSouth Ribble30UPWest Lancashire30UQWyre
31 (UKF22)Leicestershire31UBBlaby31UCCharnwood31UDHarborough31UEHinckley and Bosworth31UFobsolete, was Leicester31UGMelton31UHNorth West Leicestershire31UJOadby and Wigston31UKobsolete, was Rutland
32 (UKF30)Lincolnshire32UBBoston32UCEast Lindsey32UDLincoln32UENorth Kesteven32UFSouth Holland32UGSouth Kesteven32UHWest Lindsey
33 (UKH13)Norfolk33UBBreckland33UCBroadland33UDGreat Yarmouth33UEKing's Lynn and West Norfolk33UFNorth Norfolk33UGNorwich33UHSouth Norfolk
34 (UKF23)Northamptonshire34UBCorby34UCDaventry34UDEast Northamptonshire34UEKettering34UFNorthampton34UGSouth Northamptonshire34UHWellingborough
35 (UKC21)Northumberland35UBAlnwick35UCBerwick-upon-Tweed35UDBlyth Valley35UECastle Morpeth35UFTynedale35UGWansbeck
36 (UKE22)North Yorkshire36UBCraven36UCHambleton36UDHarrogate36UERichmondshire36UFRyedale36UGScarborough36UHSelby36UJobsolete, was York
37Nottinghamshire37UB (UKF15)Ashfield37UC (UKF15)Bassetlaw37UD (UKF16)Broxtowe37UE (UKF16)Gedling37UF (UKF15)Mansfield37UG (UKF15)Newark and Sherwood37UHobsolete, was Nottingham37UJ (UKF16)Rushcliffe
38 (UKJ14)Oxfordshire38UBCherwell38UCOxford38UDSouth Oxfordshire38UEVale of White Horse38UFWest Oxfordshire
39 (UKG22)Shropshire39UBBridgnorth39UCNorth Shropshire39UDOswestry39UEShrewsbury and Atcham39UFSouth Shropshire39UGobsolete, was The Wrekin
40 (UKK23)Somerset40UBMendip40UCSedgemoor40UDSouth Somerset40UETaunton Deane40UFWest Somerset
41 (UKG24)Staffordshire41UBCannock Chase41UCEast Staffordshire41UDLichfield41UENewcastle-under-Lyme41UFSouth Staffordshire41UGStafford41UHStaffordshire Moorlands41UJobsolete, was Stoke-on-Trent41UKTamworth
42 (UKH14)Suffolk42UBBabergh42UCForest Heath42UDIpswich42UEMid Suffolk42UFSt. Edmundsbury42UGSuffolk Coastal42UHWaveney
43 (UKJ23)Surrey43UBElmbridge43UCEpsom and Ewell43UDGuildford43UEMole Valley43UFReigate and Banstead43UGRunnymede43UHSpelthorne43UJSurrey Heath43UKTandridge43ULWaverley43UMWoking
44 (UKG13)Warwickshire44UBNorth Warwickshire44UCNuneaton and Bedworth44UDRugby44UEStratford-on-Avon44UFWarwick
45 (UKJ24)West Sussex45UBAdur45UCArun45UDChichester45UECrawley45UFHorsham45UGMid Sussex45UHWorthing
46 (UKK15)Wiltshire46UBKennet46UCNorth Wiltshire46UDSalisbury46UEobsolete, was Thamesdown46UFWest Wiltshire
47 (UKG12)Worcestershire47UBBromsgrove47UCMalvern Hills47UDRedditch47UEWorcester47UFWychavon47UGWyre Forest
Northern Ireland districts
95A (UKN04)Derry95B (UKN04)Limavady95C (UKN04)Coleraine95D (UKN04)Ballymoney95E (UKN04)Moyle95F (UKN03)Larne95G (UKN03)Ballymena95H (UKN05)Magherafelt95I (UKN05)Cookstown95J (UKN04)Strabane95K (UKN05)Omagh95L (UKN05)Fermanagh95M (UKN05)Dungannon and South Tyrone95N (UKN03)Craigavon95O (UKN05)Armagh95P (UKN05)Newry and Mourne95Q (UKN03)Banbridge95R (UKN03)Down95S (UKN02)Lisburn95T (UKN03)Antrim95U (UKN02)Newtownabbey95V (UKN02)Carrickfergus95W (UKN02)North Down95X (UKN03)Ards95Y (UKN02)Castlereagh95Z (UKN01)Belfast
Non-hierarchical codes for summary data in metropolitan areas
1BInner London1COuter London2AGreater Manchester2BMerseyside2CSouth Yorkshire2DTyne and Wear2EWest Midlands2FWest Yorkshire
2009 structural changes
The following changes will be made on 1st April 2009 to reflect the 2009 structural changes to local government in England. [3]
| Current LA Name | Current LA Code | Description | New UA code |
| Bedford | 09UD | 1 district abolished – 1 unitary authority created which will be called Bedford |
00KB |
| Mid Bedfordshire South Bedfordshire |
09UC 09UE |
2 districts abolished – 1 unitary authority created which will be called Central Bedfordshire |
00KC |
| Congleton Crewe and Nantwich Macclesfield |
13UC 13UD 13UG |
3 districts abolished – 1 unitary authority created which will be called Cheshire East |
00EQ |
| Chester Ellesmere Port and Neston Vale Royal |
13UB 13UE 13UH |
3 districts abolished – 1 unitary authority created which will be called Chester |
00EW |
| Caradon Carrick Kerrier North Cornwall Penwith Restormel |
15UB 15UC 15UD 15UE 15UF 15UG |
6 districts abolished - 1 unitary authority created which will be called Cornwall |
00HE |
| Isles of Scilly | 15UH | Coding change only | 00HF |
| Chester-le-Street Derwentside Durham Easington Sedgefield Teesdale Wear Valley |
20UB 20UD 20UE 20UF 20UG 20UH 20UJ |
7 districts abolished – 1 unitary authority created which will be called County Durham |
00EJ |
| Alnwick Berwick-upon-Tweed Blyth Valley Castle Morpeth Tynedale Wansbeck |
35UB 35UC 35UD 35UE 35UF 35UG |
6 districts abolished – 1 unitary authority created which will be called Northumberland |
00EM |
| Bridgnorth North Shropshire Oswestry Shrewsbury and Atcham South Shropshire |
39UB 39UC 39UD 39UE 39UF |
5 districts abolished – 1 unitary authority created which will be called Shropshire |
00GG |
| Kennet North Wiltshire Salisbury West Wiltshire |
46UB 46UC 46UD 46UF |
4 districts abolished – 1 unitary authority created which will be called Wiltshire |
00HY |
References
- ↑ Beginners' Guide to UK Geography - Super Output Areas
- ↑ Super Output Areas: Frequently Asked Questions
- ↑ E-mail from ONS Geography Customer Services 2 Mar 2009
