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SL postcode area

Postcode area within the United Kingdom

Wikipedia contributorsAdapted for Fathomly · View authors
1 min read
Source updated November 18, 2025
Template:Attached KML/SL postcode area KML is from Wikidata

The SL postcode area, also known as the Slough postcode area, is a group of ten postcode districts in South East England, within eight post towns. These cover east Berkshire (including Slough, Maidenhead, Windsor and Ascot) and south Buckinghamshire (including Iver, Gerrards Cross, Marlow and Bourne End).

Mail for this area is sorted in Greenford (Green Park Way).

01Coverage

The approximate coverage of the postcode districts:

Postcode district Post town Coverage Local authority area(s)
SL0 IVER Iver, Iver Heath, Richings Park, Thorney Buckinghamshire
SL1 SLOUGH Slough, Burnham, Cippenham, Farnham Royal, Stoke Poges, Littleworth, Farnham Common Slough, Buckinghamshire
SL2 SLOUGH Britwell, Farnham Common, Farnham Royal, Stoke Poges, Egypt, Hedgerley Slough, Buckinghamshire
SL3 SLOUGH Langley, Datchet, Colnbrook, Poyle, Horton, Fulmer, George Green, Wexham, part of Richings Park Slough, Buckinghamshire, Windsor and Maidenhead
SL4 WINDSOR Water Oakley, Windsor, Old Windsor, Eton, Eton Wick, Clewer, Dedworth, Cranbourne, Winkfield, Dorney, Spital, Oakley Green, Woodside, Boveney, Fifield (east) Windsor and Maidenhead, Bracknell Forest, Buckinghamshire, Slough
SL5 ASCOT Ascot, Sunninghill, Sunningdale, North Ascot, South Ascot, Burleigh, Cheapside Windsor and Maidenhead, Bracknell Forest
SL6 MAIDENHEAD Maidenhead, Taplow, parts of Cippenham Slough, Bray, Braywick, Cookham, Cookham Dean, Cookham Rise, White Waltham, Hurley, Hurley Bottom, Holyport, Pinkneys Green, Woodlands Park, Furze Platt, Hitcham, Littlewick Green, Burchett's Green, Paley Street, Stud Green, Touchen End, Fifield (west) Windsor and Maidenhead, Buckinghamshire
SL7 MARLOW Marlow, Marlow Bottom, Little Marlow, Medmenham, Bisham, Lower Woodend Buckinghamshire, Windsor and Maidenhead
SL8 BOURNE END Bourne End, Well End Buckinghamshire
SL9 GERRARDS CROSS Gerrards Cross, Chalfont St Peter, Chalfont Common, Horn Hill, Tatling End (west) Buckinghamshire, Three Rivers
SL60 SLOUGH Jobcentre Plus non-geographic
SL95 SLOUGH Royal Mail non-geographic
SL postcode area map, showing postcode districts in red and post towns in grey text, with links to nearby GU, HP, KT, RG, TW, UB and WD postcode areas.
SL postcode area map, showing postcode districts in red and post towns in grey text, with links to nearby GU, HP, KT, RG, TW, UB and WD postcode areas.

02WM postcode area

In 2008, a group of residents in the Royal Borough of Windsor and Maidenhead campaigned to have Windsor and Maidenhead's SL postcodes replaced with WM postcodes, claiming the association with Slough affected the towns' statuses as "desirable places to live". Royal Mail later stated that the campaign would be "unlikely to succeed".

03Map

Template:Attached KML/SL postcode area KML is from Wikidata
Watch videos about SL postcode areaExplainers and documentaries on YouTube (opens in a new tab)

Sources and credits

This article is adapted from the Wikipedia article “SL postcode area”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.

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