SE postcode area
postcode area within the United Kingdom
The SE (South Eastern) postcode area covers a broad area of the south and south-east of the London, England 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).
Postal administration
The postcode area originated in 1857 as the SE district. In 1868 it gained some of the area of the short-lived S district, with the rest going to SW. It was divided into numbered districts in 1917, by giving the district closest to London that hosted the head office the suffix "1" and all others alphabetically based on a locally important parish, chapelry, topological or built environment feature administering or close to the local distribution office. SE28 is a late addition carved out of the existing districts SE2 and SE18 to reflect the building up of a new London district in what had been the meadows and marshes by the tidal Thames in the parish of Plumstead: Thamesmead.
Unlike SW, where a consecutive 50%, there ten, districts can more officially be traced into two alphabetical groups excluding SW1, SE has always technically followed the norm in that SE1 is the only head district. However SE19 was drawn up to serve the key distribution office serving Norwood after a complete alphabetical series so that those surrounding it and SE21 (Dulwich): SE20 and SE22 to SE27 are strictly alphabetical afresh (Anerley to West Norwood) but it has never technically been a "head district". The postcode area is part of the London post town. There are no dependent localities used in the postcode area. SE1P is a non-geographic postcode district for PO boxes located in SE1.
“SE postcode area” enters the record as postcode area within the United Kingdom. Crown Archives preserves that source wording while asking what postcode, area and within can confirm, complicate or overturn.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 2, 2026. The linked authority identifier is Q7389916. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1857, 1868 and 1917.
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This entry incorporates text from “SE postcode area” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.