|Coordinates: 51°24′11″N1°02′06″W / 51.403°N 1.035°W|
|Postcode area name|
|Statistics as at May 2020 |
The RG postcode area, also known as the Reading postcode area,  is a group of thirty postcode districts in England, within twelve post towns. These cover west and central Berkshire (including Reading, Bracknell, Crowthorne, Hungerford, Newbury, Thatcham and Wokingham) and north Hampshire (including Basingstoke, Hook, Tadley and Whitchurch), plus a small part of south-east Oxfordshire (including Henley-on-Thames) and very small parts of Buckinghamshire and Wiltshire.
Mail for the area is sorted at the Thames Valley Mail Centre in Swindon, having been sorted at the Reading Mail Centre until its closure in 2010.
The original RG3 district for west Reading was recoded to RG30 and RG31 in January 1995, due to the rise in population in that area.  In the same year, the original RG11 district for Wokingham and Crowthorne was recoded to RG40, RG41 and RG45, while the northern part of the RG12 district for Bracknell was recoded to RG42. Hungerford and Thatcham was also separated from the Newbury-dependent RG15 and RG16 postcodes, subsequently being recoded into RG17 and RG18-19, respectively, thus reducing the extent of the Newbury postal town to RG14 and RG20. RG26-29 ceased to be dependent on the Basingstoke postal town as the areas the postcodes represent were assigned new postal towns. 
The approximate coverage of the postcode districts:
|Postcode district||Post town||Coverage||Local authority area(s)|
|RG1||READING||Katesgrove, Newtown, Reading (central)||Reading|
|RG2||READING||Madejski Stadium, Whitley, Shinfield, Arborfield Garrison, Arborfield, Green Park Village||Reading, Wokingham|
|RG4||READING||Caversham, Sonning, Sonning Common, Kidmore End, Sonning Eye, Dunsden Green, Mapledurham, Chazey Heath, Tokers Green, Chalkhouse Green, Cane End||Reading, South Oxfordshire, Wokingham|
|RG7||READING||Aldermaston, Bradfield, Burghfield Common, Riseley, Silchester, Mortimer, Swallowfield, Theale, Woolhampton||West Berkshire, Basingstoke and Deane, Wokingham|
|RG8||READING||Goring, Streatley, Pangbourne, Whitchurch-on-Thames||South Oxfordshire, West Berkshire|
|RG9||HENLEY-ON-THAMES||Hambleden, Rotherfield Peppard, Turville, Turville Heath, Skirmett, Rockwell End, Mill End, Fawley, Fingest, Frieth, Greenlands, Nettlebed, Shiplake, Henley-on-Thames||South Oxfordshire, Buckinghamshire|
|RG10||READING||Charvil, Hurst, Ruscombe, Twyford, Wargrave, Waltham St Lawrence||Wokingham, Windsor and Maidenhead|
|RG12||BRACKNELL||Bracknell (south and town centre), Easthampstead, Bullbrook||Bracknell Forest|
|RG14||NEWBURY||Newbury (whole town area)||West Berkshire|
|RG17||HUNGERFORD||Chilton Foliat, Eastbury, Eddington, Kintbury, Hungerford, Inkpen, Lambourn, North Wessex Downs AONB area||West Berkshire, Wiltshire, Vale of White Horse|
|RG18||THATCHAM||Hampstead Norreys, Hermitage, Thatcham (north), Yattendon||West Berkshire|
|RG19||THATCHAM||Ashford Hill with Headley, Bishop's Green, Greenham, Thatcham (south)||West Berkshire, Basingstoke and Deane|
|RG20||NEWBURY||Ashmansworth, Chieveley, Compton, Ecchinswell, Leckhampstead, Highclere, Kingsclere, Sydmonton||West Berkshire, Basingstoke and Deane|
|RG21||BASINGSTOKE||Town Centre, Eastrop, Black Dam, Oakridge, South View||Basingstoke and Deane|
|RG22||BASINGSTOKE||South Ham, Brighton Hill, Kempshott, Buckskin, Beggarwood||Basingstoke and Deane|
|RG23||BASINGSTOKE||Winklebury, Rooksdown, Oakley||Basingstoke and Deane|
|RG24||BASINGSTOKE||Popley, Chineham, Sherborne St John||Basingstoke and Deane|
|RG25||BASINGSTOKE||Cliddesden, Dummer, Overton, North Waltham||Basingstoke and Deane|
|RG26||TADLEY||Baughurst, Bramley, Brimpton Common, Hannington, Pamber End, Pamber Heath, Tadley||Basingstoke and Deane, West Berkshire|
|RG27||HOOK||Hook, Sherfield-on-Loddon, Stratfield Turgis, Turgis Green||Basingstoke and Deane, Hart|
|RG28||WHITCHURCH||Laverstoke, Litchfield, Hurstbourne Priors, Whitchurch (Hants)||Basingstoke and Deane, Test Valley|
|RG29||HOOK||Long Sutton, Odiham, North Warnborough, South Warnborough||Hart|
|RG30||READING||Tilehurst (east), Prospect Park, Burghfield village, West Reading, Southcote||Reading, West Berkshire|
|RG31||READING||Calcot, Tilehurst (west)||Reading, West Berkshire|
|RG40||WOKINGHAM||Wokingham (east and town centre), Finchampstead, Barkham (south), Wick Hill||Wokingham, Bracknell Forest|
|RG41||WOKINGHAM||Wokingham (west), Winnersh, Woosehill, Barkham (north), Sindlesham, Emmbrook, Eastheath||Wokingham|
|RG42||BRACKNELL||Bracknell (north), Binfield, Warfield, Newell Green, Popeswood, Priestwood, Winkfield Row, Jealott's Hill||Bracknell Forest|
|RG45||CROWTHORNE||Crowthorne, Ravenswood||Bracknell Forest, Wokingham|
The W postcode area, also known as the London W postcode area is a group of postcode districts covering part of central and part of West London, England. The area originates from the Western (W1) and Paddington (W2-14) districts of the London postal district. This area covers 35 postcode districts and around 18,554 live postcodes.
The E (Eastern) postcode area, also known as the London E postcode area, is the part of the London post town covering much of east London, England. It borders the N postcode area to the west, both north of the tidal Thames. Since closure of the East London mail centre its mail is sorted at Romford Mail Centre together with IG and RM postcode areas.
The WC postcode area, also known as the London WC postcode area, is a group of postcode districts in central London, England. The area covered is of high density development, and includes parts of the City of Westminster and the London Boroughs of Camden and Islington, plus a very small part of the City of London.
The KT postcode area, also known as the Kingston upon Thames postcode area, is a group of 24 postcode districts in England, within 19 post towns. These cover boroughs in south-west Greater London and several boroughs in north-east Surrey.
The TW postcode area, also known as the Twickenham postcode area, is a group of twenty postcode districts in south-east England, within thirteen post towns. These cover parts of south-west London and north-west Surrey, plus a very small part of Berkshire.
The CM postcode area, also known as the Chelmsford postcode area, is a group of 25 postcode districts in England, within 16 post towns. These cover central Essex, plus a small part of east Hertfordshire and a very small part of the London Borough of Havering.
The GU postcode area, also known as the Guildford postcode area, is a group of 38 postcode districts in South East England, within 24 post towns. These cover west Surrey, north-east Hampshire, northwestern West Sussex and a small part of south-east Berkshire.
The M postcode area, also known as the Manchester postcode area, is a group of postcode districts in the North West of England.
The WD postcode area, also known as the Watford postcode area, is a group of eleven postcode districts in Greater London and Hertfordshire, within seven post towns. These cover south-west Hertfordshire, plus very small parts of Buckinghamshire and the London Borough of Hillingdon.
The WA postcode area, also known as the Warrington postcode area, is a group of sixteen postcode districts in North West England, within nine post towns. These cover north Cheshire, eastern Merseyside and small parts of Greater Manchester.
The SE postcode area covers a broad radial swathe of the south-east of the London post town from the Albert Embankment to West Heath and the nearest edges of Sidcup and Selhurst. It loosely corresponds to the boroughs of Southwark, Lewisham and Greenwich plus indicated parts of the boroughs of Croydon (north), Lambeth (east), Bexley (west) and Bromley (northwest).
The OX postcode area, also known as the Oxford postcode area, is a group of 26 postcode districts in south-central England, within 17 post towns. These cover most of Oxfordshire, plus very small parts of Northamptonshire, Buckinghamshire, Berkshire, Gloucestershire and Warwickshire.
The PL postcode area, also known as the Plymouth postcode area, is a group of 35 postcode districts in South West England, within 25 post towns. These cover west Devon and east Cornwall.
The AB postcode area, also known as the Aberdeen postcode area is a group of 33 postcode districts in north-east Scotland, within 24 post towns. These cover the Aberdeen council area, Aberdeenshire and east Moray.
The IV postcode area, also known as the Inverness postcode area, is a group of 52 postcode districts for post towns: Achnasheen, Alness, Avoch, Beauly, Bonar Bridge, Cromarty, Dingwall, Dornoch, Elgin, Fochabers, Forres, Fortrose, Gairloch, Garve, Invergordon, Inverness, Isle of Skye, Kyle, Lairg, Lossiemouth, Muir of Ord, Munlochy, Nairn, Plockton, Portree, Rogart, Strathcarron, Strathpeffer, Strome Ferry, Tain and Ullapool in north Scotland.
The BB postcode area, also known as the Blackburn postcode area, is a group of thirteen postcode districts in north-west England, within nine post towns. These cover east Lancashire, including Blackburn, Burnley, Accrington, Barnoldswick, Clitheroe, Colne, Darwen, Nelson and Rossendale.
The PR postcode area, also known as the Preston postcode area, is a group of eleven postcode districts in North West England, within four post towns. These cover south-west Lancashire and north Merseyside.
The SW postcode area, also known as the London SW postcode area, is a group of 20 postcode districts within the London post town in England. The area comprises the South Western operational district and the Battersea operational district, and is the only area within the London post town to lie on both sides of the River Thames.