A post box (British English and others, also written postbox, known in the United States and Canada as collection box, mailbox, post box, letter box, or drop box) is a physical box into which members of the public can deposit outgoing mail intended for collection by the agents of a country's postal service. The term post box can also refer to a private letter box for incoming mail.In 1653, the first post boxes are believed to have been installed in and around Paris.[1] By 1829, post boxes were in use throughout France.[2] The first public post boxes in Poland were installed in Warsaw in 1842.

In 1653, the first post boxes are believed to have been installed in and around Paris.[1] By 1829, post boxes were in use throughout France.[2] The first public post boxes in Poland were installed in Warsaw in 1842.

A post box originally installed in the wall of the Wakefield Post Office is dated 1809 and believed to be the oldest example in Britain.[4] It is now on display at the new Wakefield Museum.