They are found in the United Kingdom and its associated the Crown Dependencies and British Overseas Territories, and, less commonly, in many members of the Commonwealth of Nations such as Cyprus, India, Gibraltar, Hong Kong, Malta, New Zealand and Sri Lanka, as well as in the Republic of Ireland.
The United Kingdom also exported pillar boxes to countries that ran their own postal services, such as Argentina, Portugal and Uruguay.
[3] In recent years boxes manufactured in glass-fibre or acrylonitrile butadiene styrene (ABS) plastic have been produced that do not follow these general outlines.
[4] Cast iron pillar box construction comprises three distinct main parts: The cap sits on top of the carcass and is usually bolted down from inside.
Before the introduction of pillar boxes, in the UK, it was customary to take outgoing mail to the nearest letter-receiving house or post office.
The advent of the British wayside letter box can be traced to Sir Rowland Hill, Secretary of the Post Office, and his Surveyor for the Western District, and noted novelist, Anthony Trollope.
The foundry of Vaudin & Son in Jersey was commissioned to produce them and the first four were erected in David Place, New Street, Cheapside and St Clement's Road in Saint Helier and brought into public use on 23 November 1852.
One Vaudin box still stands in Union Street, Saint Peter Port, Guernsey whilst another is in the British Postal Museum & Archive collection in London.
The earliest ones were essentially experimental, including octagonal pillars or fluted columns, vertical slits instead of horizontal ones, and other unusual features.
This fact is commemorated today with a replica Penfold box, located outside the Old Town Hall in Carlisle city centre.
The oldest pillar boxes still in use by the Royal Mail are at Framlingham in Suffolk; this pair were founded by Andrew Handyside and Company of Derby in 1856 and are at Double Street and College Road.
The postbox believed to be the oldest in Scotland, is a wall box which sits on the front of the Golspie Inn (formerly the Sutherland Arms Hotel); it carries the royal cypher of Queen Victoria and dates back to 1861.
It was stored in a contractor's yard in London which was subject to a direct hit from a German bomb during the Blitz, thus destroying forever some important boxes.
A similar, much-simplified version has survived painted green by An Post at the Cork Kent railway station, Ireland.
A number have survived across the UK, including Aberdeen, Brighton, Stoke, Worthing, London, World's End Hambledon, Bristol, Congresbury, and Newport, Isle of Wight.
In the busy city of Liverpool, even these boxes could not provide the capacity and security required, so a special design was commissioned from the foundry of Cochrane Grove & Co of Dudley.
Others are spread across England, Ireland, India (including locally made copies), British Guyana, Australia and New Zealand.
Penfolds, which are distinguished by their hexagonal construction and acanthus bud surmounting the cap, were originally exclusively city-based, but have now been installed rural areas as well.
Andrew Handyside of Derby was the foundry, but omitted the royal cypher and the words "Post Office" leading to the Anonymous sobriquet.
Boxes were again made in two sizes, designated Type D and Type E, and carried raised lettering on the castings indicating the position of the stamp vending machine, as well as an array of small enamel plates warning users of the danger of bent coins and the need to wait for stamps to be issued before inserting more money.
[12] To facilitate easy collection of air mail and its speedy onward transmission, a fleet of special vehicles and dedicated postboxes were introduced.
However, the British climate did not suit the use of galvanised steel (a problem often seen with the 1940 and 1988 pattern of lamp box) and the Vandyke pillars soon began to rust badly.
In 1974 the Post Office experimented with a similar rectangular design known as Type G. This was made in traditional cast iron by the foundry of Carron Company near Falkirk, Scotland.
It was an operational success, but the public disliked the "square" designs and petitioned the Post Office for a return to cylindrical boxes.
Made in traditional cast iron, it stayed in production until 2000. Notable features included: replaceable lifting ring screwed into the dome of the box, body and roof of box cast as one piece, large easy-to-read collection time plate, all surface details and collection plate window recessed to give a perfect cylindrical outline, integral restrictor plate, know colloquially as a "Belfast Flap" to restrict posting to letters only and a flanged shallow base suitable for installation in modern buildings, shopping centres and other urban areas.
The design had one major flaw in the area of the door hinge, which is prone to snap under stress and the K type pillar boxes are no longer being installed.
After several E II R pillar boxes were blown up by improvised explosive devices, the General Post Office (as it was at that time) replaced them with ones which only bore the Crown of Scotland and no royal cypher.
To mark the 2012 Summer Olympics, Royal Mail, Isle of Man Post and Guernsey Post painted a pillar box gold in the home town of each Great Britain team member who won a gold medal, as well as a demonstration model near Westminster Abbey.
The Cardiff postbox, in King Edward VII Avenue, depicts Mary Seacole and the Bedford Street pillar, in Belfast depicts Sir Lenny Henry, a stand-up comedian, actor, singer, writer and television presenter and co-founder of the Comic Relief charity.
[21] The first post box to carry the insignia of King Charles III was unveiled on 12 July 2024, in Great Cambourne, Cambridgeshire.