| County | Region | |
|---|---|---|
| Guernsey | Crown Dependencies | |
| IOM | Crown Dependencies | |
| Jersey | Crown Dependencies | |
| North East Derbyshire | East Midlands | |
| Amber Valley | East Midlands | |
| Ashfield | East Midlands | |
| Bassetlaw | East Midlands | |
| Blaby | East Midlands | |
| Bolsover | East Midlands | |
| Boston | East Midlands | |
| Broxtowe | East Midlands | |
| Charnwood | East Midlands | |
| Chesterfield | East Midlands | |
| Corby | East Midlands | |
| Daventry | East Midlands | |
| Derby | East Midlands | |
| Derbyshire | East Midlands | |
| Derbyshire | East Midlands | |
| Derbyshire Dales | East Midlands | |
| East Lindsey | East Midlands | |
| East Northamptonshire | East Midlands | |
| Erewash | East Midlands | |
| Gedling | East Midlands | |
| Harborough | East Midlands | |
| High Peak | East Midlands | |
| Hinckley and Bosworth | East Midlands | |
| Kettering | East Midlands | |
| Leicester | East Midlands | |
| Leicestershire | East Midlands | |
| Leicestershire | East Midlands | |
| Lincoln | East Midlands | |
| Lincolnshire | East Midlands | |
| Lincolnshire | East Midlands | |
| Mansfield | East Midlands | |
| Melton | East Midlands | |
| Newark and Sherwood | East Midlands | |
| North Kesteven | East Midlands | |
| North West Leicestershire | East Midlands | |
| Northampton | East Midlands | |
| Northamptonshire | East Midlands | |
| Nottingham | East Midlands | |
| Nottinghamshire | East Midlands | |
| Nottinghamshire | East Midlands | |
| Oadby and Wigston | East Midlands | |
| Rushcliffe | East Midlands | |
| Rutland | East Midlands | |
| South Derbyshire | East Midlands | |
| South Holland | East Midlands | |
| South Kesteven | East Midlands | |
| South Northamptonshire | East Midlands | |
| Wellingborough | East Midlands | |
| West Lindsey | East Midlands | |
| Babergh | East of England | |
| Basildon | East of England | |
| Bedford | East of England | |
| Bedford Borough | East of England | |
| Bedfordshire | East of England | |
| Braintree | East of England | |
| Breckland | East of England | |
| Brentwood | East of England | |
| Broadland | East of England | |
| Broxbourne | East of England | |
| Cambridge | East of England | |
| Cambridgeshire | East of England | |
| Cambridgeshire | East of England | |
| Castle Point | East of England | |
| Central Bedfordshire | East of England | |
| Chelmsford | East of England | |
| Colchester | East of England | |
| Dacorum | East of England | |
| East Cambridgeshire | East of England | |
| East Hertfordshire | East of England | |
| Epping Forest | East of England | |
| Essex | East of England | |
| Essex | East of England | |
| Fenland | East of England | |
| Forest Heath | East of England | |
| Great Yarmouth | East of England | |
| Harlow | East of England | |
| Hertfordshire | East of England | |
| Hertsmere | East of England | |
| Huntingdonshire | East of England | |
| Ipswich | East of England | |
| King's Lynn and West Norfolk | East of England | |
| Luton | East of England | |
| Maldon | East of England | |
| Mid Suffolk | East of England | |
| Norfolk | East of England | |
| North Hertfordshire | East of England | |
| North Norfolk | East of England | |
| Norwich | East of England | |
| Peterborough | East of England | |
| Rochford | East of England | |
| South Cambridgeshire | East of England | |
| South Norfolk | East of England | |
| Southend-on-Sea | East of England | |
| St Albans | East of England | |
| St. Edmundsbury | East of England | |
| Stevenage | East of England | |
| Suffolk | East of England | |
| Suffolk Coastal | East of England | |
| Tendring | East of England | |
| Three Rivers | East of England | |
| Thurrock | East of England | |
| Uttlesford | East of England | |
| Watford | East of England | |
| Waveney | East of England | |
| Welwyn Hatfield | East of England | |
| Barking and Dagenham | London | |
| Barnet | London | |
| Bexley | London | |
| Brent | London | |
| Bromley | London | |
| Camden | London | |
| City of London | London | |
| City of London | London | |
| City of Westminster | London | |
| Croydon | London | |
| Ealing | London | |
| Enfield | London | |
| Greater London | London | |
| Greenwich | London | |
| Hackney | London | |
| Hammersmith and Fulham | London | |
| Haringey | London | |
| Harrow | London | |
| Havering | London | |
| Hillingdon | London | |
| Hounslow | London | |
| Islington | London | |
| Kensington and Chelsea | London | |
| Kingston upon Thames | London | |
| Lambeth | London | |
| Lewisham | London | |
| Merton | London | |
| Newham | London | |
| Redbridge | London | |
| Richmond | London | |
| Southwark | London | |
| Sutton | London | |
| Tower Hamlets | London | |
| Waltham Forest | London | |
| Wandsworth | London | |
| Westminster | London | |
| County Durham | North East England | |
| Darlington | North East England | |
| Durham | North East England | |
| Durham | North East England | |
| Gateshead | North East England | |
| Hartlepool | North East England | |
| Middlesbrough | North East England | |
| Newcastle Upon Tyne | North East England | |
| North Tyneside | North East England | |
| North Yorkshire | North East England | |
| Northumberland | North East England | |
| Redcar and Cleveland | North East England | |
| South Tyneside | North East England | |
| Stockton-on-Tees | North East England | |
| Sunderland | North East England | |
| Tyne and Wear | North East England | |
| Allerdale | North West England | |
| Barrow-in-Furness | North West England | |
| Blackburn with Darwen | North West England | |
| Blackpool | North West England | |
| Bolton | North West England | |
| Burnley | North West England | |
| Bury | North West England | |
| Carlisle | North West England | |
| Cheshire | North West England | |
| Cheshire East | North West England | |
| Cheshire West and Chester | North West England | |
| Chorley | North West England | |
| Copeland | North West England | |
| Cumbria | North West England | |
| Eden | North West England | |
| Fylde | North West England | |
| Greater Manchester | North West England | |
| Halton | North West England | |
| Hyndburn | North West England | |
| Knowsley | North West England | |
| Lancashire | North West England | |
| Lancashire | North West England | |
| Lancaster | North West England | |
| Liverpool | North West England | |
| Manchester | North West England | |
| Merseyside | North West England | |
| Oldham | North West England | |
| Pendle | North West England | |
| Preston | North West England | |
| Ribble Valley | North West England | |
| Rochdale | North West England | |
| Rossendale | North West England | |
| Salford | North West England | |
| Sefton | North West England | |
| South Lakeland | North West England | |
| South Ribble | North West England | |
| St Helens | North West England | |
| St. Helens | North West England | |
| Stockport | North West England | |
| Tameside | North West England | |
| Trafford | North West England | |
| Warrington | North West England | |
| West Lancashire | North West England | |
| Wigan | North West England | |
| Wirral | North West England | |
| Wyre | North West England | |
| Antrim | Northern Ireland | |
| Ards | Northern Ireland | |
| Armagh | Northern Ireland | |
| Ballymena | Northern Ireland | |
| Ballymoney | Northern Ireland | |
| Banbridge | Northern Ireland | |
| Belfast | Northern Ireland | |
| Carrickfergus | Northern Ireland | |
| Castlereagh | Northern Ireland | |
| Coleraine | Northern Ireland | |
| Cookstown | Northern Ireland | |
| County Armagh | Northern Ireland | |
| County Fermanagh | Northern Ireland | |
| Craigavon | Northern Ireland | |
| Derry | Northern Ireland | |
| Down | Northern Ireland | |
| Dungannon | Northern Ireland | |
| Fermanagh | Northern Ireland | |
| Larne | Northern Ireland | |
| Limavady | Northern Ireland | |
| Lisburn | Northern Ireland | |
| Magherafelt | Northern Ireland | |
| Moyle | Northern Ireland | |
| Newry and Mourne | Northern Ireland | |
| Newry and Mourne | Northern Ireland | |
| Newtownabbey | Northern Ireland | |
| North Down | Northern Ireland | |
| Omagh | Northern Ireland | |
| South Tyrone | Northern Ireland | |
| Strabane | Northern Ireland | |
| Aberdeen City | Scotland | |
| Aberdeenshire | Scotland | |
| Angus | Scotland | |
| Argyll and Bute | Scotland | |
| Argyllshire | Scotland | |
| Ayrshire | Scotland | |
| Banffshire | Scotland | |
| Berwickshire | Scotland | |
| Bute | Scotland | |
| Caithness | Scotland | |
| City of Edinburgh | Scotland | |
| Clackmannanshire | Scotland | |
| Dumfries and Galloway | Scotland | |
| Dumfriesshire | Scotland | |
| Dunbartonshire | Scotland | |
| Dundee City | Scotland | |
| East Ayrshire | Scotland | |
| East Dunbartonshire | Scotland | |
| East Lothian | Scotland | |
| East Renfrewshire | Scotland | |
| Edinburgh City | Scotland | |
| Eilean Siar | Scotland | |
| Falkirk | Scotland | |
| Fife | Scotland | |
| Glasgow City | Scotland | |
| Highland | Scotland | |
| Inverclyde | Scotland | |
| Inverness-shire | Scotland | |
| Kincardineshire | Scotland | |
| Kinross-shire | Scotland | |
| Kirkcudbrightshire | Scotland | |
| Lanarkshire | Scotland | |
| Midlothian | Scotland | |
| Moray | Scotland | |
| Nairnshire | Scotland | |
| North Ayrshire | Scotland | |
| North Lanarkshire | Scotland | |
| Orkney | Scotland | |
| Orkney Islands | Scotland | |
| Peeblesshire | Scotland | |
| Perth and Kinross | Scotland | |
| Perthshire | Scotland | |
| Renfrewshire | Scotland | |
| Ross and Cromarty | Scotland | |
| Roxburghshire | Scotland | |
| Selkirkshire | Scotland | |
| Shetland Islands | Scotland | |
| South Ayrshire | Scotland | |
| South Lanarkshire | Scotland | |
| South Lanarkshire | Scotland | |
| Stirling | Scotland | |
| Stirlingshire | Scotland | |
| Sutherland | Scotland | |
| The Scottish Borders | Scotland | |
| West Ayrshire | Scotland | |
| West Dunbartonshire | Scotland | |
| West Lothian | Scotland | |
| Wigtownshire | Scotland | |
| Zetland | Scotland | |
| Adur | South East England | |
| Arun | South East England | |
| Ashford | South East England | |
| Aylesbury Vale | South East England | |
| Basingstoke and Deane | South East England | |
| Berkshire | South East England | |
| Bracknell Forest | South East England | |
| Brighton and Hove | South East England | |
| Buckinghamshire | South East England | |
| Buckinghamshire | South East England | |
| Canterbury | South East England | |
| Cherwell | South East England | |
| Chichester | South East England | |
| Chiltern | South East England | |
| Crawley | South East England | |
| Dartford | South East England | |
| Dover | South East England | |
| East Hampshire | South East England | |
| East Sussex | South East England | |
| East Sussex | South East England | |
| Eastbourne | South East England | |
| Eastleigh | South East England | |
| Elmbridge | South East England | |
| Epsom and Ewell | South East England | |
| Fareham | South East England | |
| Gosport | South East England | |
| Gravesham | South East England | |
| Guildford | South East England | |
| Hampshire | South East England | |
| Hampshire | South East England | |
| Hart | South East England | |
| Hastings | South East England | |
| Havant | South East England | |
| Horsham | South East England | |
| Isle of Wight | South East England | |
| Kent | South East England | |
| Kent | South East England | |
| Lewes | South East England | |
| Maidstone | South East England | |
| Medway | South East England | |
| Mid Sussex | South East England | |
| Milton Keynes | South East England | |
| Mole Valley | South East England | |
| New Forest | South East England | |
| Oxford | South East England | |
| Oxfordshire | South East England | |
| Portsmouth | South East England | |
| Reading | South East England | |
| Reigate and Banstead | South East England | |
| Rother | South East England | |
| Runnymede | South East England | |
| Rushmoor | South East England | |
| Sevenoaks | South East England | |
| Shepway | South East England | |
| Slough | South East England | |
| South Bucks | South East England | |
| South Oxfordshire | South East England | |
| Southampton | South East England | |
| Spelthorne | South East England | |
| Surrey | South East England | |
| Surrey Heath | South East England | |
| Swale | South East England | |
| Tandridge | South East England | |
| Test Valley | South East England | |
| Thanet | South East England | |
| Tonbridge and Malling | South East England | |
| Tunbridge Wells | South East England | |
| Vale of White Horse | South East England | |
| Waverley | South East England | |
| Wealden | South East England | |
| West Berkshire | South East England | |
| West Oxfordshire | South East England | |
| West Sussex | South East England | |
| Winchester | South East England | |
| Windsor and Maidenhead | South East England | |
| Woking | South East England | |
| Wokingham | South East England | |
| Worthing | South East England | |
| Wycombe | South East England | |
| Bath and North East Somerset | South West England | |
| Bournemouth | South West England | |
| Bristol | South West England | |
| Cheltenham | South West England | |
| Christchurch | South West England | |
| City of Bristol | South West England | |
| Cornwall | South West England | |
| Cornwall | South West England | |
| Cotswold | South West England | |
| Devon | South West England | |
| Devon | South West England | |
| Dorset | South West England | |
| Dorset | South West England | |
| East Devon | South West England | |
| East Dorset | South West England | |
| Exeter | South West England | |
| Forest of Dean | South West England | |
| Gloucester | South West England | |
| Gloucestershire | South West England | |
| Gloucestershire | South West England | |
| Isles of Scilly | South West England | |
| Mendip | South West England | |
| Mid Devon | South West England | |
| North Devon | South West England | |
| North Dorset | South West England | |
| North Somerset | South West England | |
| Plymouth | South West England | |
| Poole | South West England | |
| Purbeck | South West England | |
| Sedgemoor | South West England | |
| Somerset | South West England | |
| Somerset | South West England | |
| South Gloucestershire | South West England | |
| South Hams | South West England | |
| South Somerset | South West England | |
| Stroud | South West England | |
| Swindon | South West England | |
| Taunton Deane | South West England | |
| Teignbridge | South West England | |
| Tewkesbury | South West England | |
| Torbay | South West England | |
| Torridge | South West England | |
| West Devon | South West England | |
| West Dorset | South West England | |
| West Somerset | South West England | |
| Weymouth and Portland | South West England | |
| Wiltshire | South West England | |
| Wiltshire | South West England | |
| Aberdare | Wales | |
| Bargoed | Wales | |
| Barry | Wales | |
| Blaenau Gwent | Wales | |
| Bridgend | Wales | |
| Caerphilly | Wales | |
| Cardiff | Wales | |
| Carmarthenshire | Wales | |
| Ceredigion | Wales | |
| Conwy | Wales | |
| Cowbridge | Wales | |
| Denbighshire | Wales | |
| Dinas Powys | Wales | |
| Ferndale | Wales | |
| Flintshire | Wales | |
| Gwynedd | Wales | |
| Hengoed | Wales | |
| Isle of Anglesey | Wales | |
| Llantwit Major | Wales | |
| Maesteg | Wales | |
| Merthyr Tydfil | Wales | |
| Monmouthshire | Wales | |
| Monmouthshire | Wales | |
| Mountain Ash | Wales | |
| Neath Port Talbot | Wales | |
| Newport | Wales | |
| Newport | Wales | |
| Pembrokeshire | Wales | |
| Penarth | Wales | |
| Pentre | Wales | |
| Pontyclun | Wales | |
| Pontypridd | Wales | |
| Porth | Wales | |
| Porthcawl | Wales | |
| Powys | Wales | |
| Rhondda Cynon Taff | Wales | |
| Rhoose | Wales | |
| Sully | Wales | |
| Swansea | Wales | |
| The Vale of Glamorgan | Wales | |
| Tonypandy | Wales | |
| Torfaen | Wales | |
| Treharris | Wales | |
| Treorchy | Wales | |
| Wrexham | Wales | |
| Birmingham | West Midlands | |
| Bromsgrove | West Midlands | |
| Cannock Chase | West Midlands | |
| Coventry | West Midlands | |
| Dudley | West Midlands | |
| East Staffordshire | West Midlands | |
| Herefordshire | West Midlands | |
| Lichfield | West Midlands | |
| Malvern Hills | West Midlands | |
| Newcastle-under-Lyme | West Midlands | |
| North Warwickshire | West Midlands | |
| Nuneaton and Bedworth | West Midlands | |
| Redditch | West Midlands | |
| Rugby | West Midlands | |
| Sandwell | West Midlands | |
| Shropshire | West Midlands | |
| Shropshire | West Midlands | |
| Solihull | West Midlands | |
| South Staffordshire | West Midlands | |
| Stafford | West Midlands | |
| Staffordshire | West Midlands | |
| Staffordshire | West Midlands | |
| Staffordshire Moorlands | West Midlands | |
| Stoke-on-Trent | West Midlands | |
| Stratford-on-Avon | West Midlands | |
| Tamworth | West Midlands | |
| Telford and Wrekin | West Midlands | |
| Walsall | West Midlands | |
| Warwick | West Midlands | |
| Warwickshire | West Midlands | |
| West Midlands | West Midlands | |
| Wolverhampton | West Midlands | |
| Worcester | West Midlands | |
| Worcestershire | West Midlands | |
| Wychavon | West Midlands | |
| Wyre Forest | West Midlands | |
| Barnsley | Yorkshire and the Humber | |
| Bradford | Yorkshire and the Humber | |
| Calderdale | Yorkshire and the Humber | |
| City of Kingston-upon-Hull | Yorkshire and the Humber | |
| Craven | Yorkshire and the Humber | |
| Doncaster | Yorkshire and the Humber | |
| East Riding of Yorkshire | Yorkshire and the Humber | |
| East Riding of Yorkshire | Yorkshire and the Humber | |
| Hambleton | Yorkshire and the Humber | |
| Harrogate | Yorkshire and the Humber | |
| Kingston upon Hull | Yorkshire and the Humber | |
| Kirklees | Yorkshire and the Humber | |
| Leeds | Yorkshire and the Humber | |
| Lincolnshire | Yorkshire and the Humber | |
| North East Lincolnshire | Yorkshire and the Humber | |
| North Lincolnshire | Yorkshire and the Humber | |
| North Yorkshire | Yorkshire and the Humber | |
| North Yorkshire | Yorkshire and the Humber | |
| Richmondshire | Yorkshire and the Humber | |
| Rotherham | Yorkshire and the Humber | |
| Ryedale | Yorkshire and the Humber | |
| Scarborough | Yorkshire and the Humber | |
| Selby | Yorkshire and the Humber | |
| Sheffield | Yorkshire and the Humber | |
| South Yorkshire | Yorkshire and the Humber | |
| Wakefield | Yorkshire and the Humber | |
| West Yorkshire | Yorkshire and the Humber | |
| York | Yorkshire and the Humber |
A list of UK counties and subdivisions ready to be mapped to their corresponding regions:
Counties include some variants to increase coverage (eg Edinburgh City and City of Edinburgh).
Sourced from:
North East Derbyshire on line 5 is prefixed with a space