South Humberside is a former postal county of England. It was introduced by the Royal Mail on 1 July 1974, when some addresses were altered in admission to the changes in administration brought about below the Local Government Act 1972.
The postal county corresponded nearly to the share of the supplementary non-metropolitan county of Humberside south of the Humber Estuary (excluding Goole, which was placed in North Humberside). All of the publicize towns included in South Humberside had formerly been ration of the Lincolnshire postal county. A changeover era of one year was allowed by the postal authorities, with the new county compulsory from 1 July 1975.
It included the next post towns, all in imitation of DN postcodes:
In 1996 the Royal Mail ceased to use counties as part of the routing instructions for mail. South Humberside is now a “former postal county”. Coincidentally, Humberside was abolished for local government purposes in the thesame year, with the area south of the Humber becoming two unitary authority areas: North Lincolnshire and North East Lincolnshire.
Although counties are no longer used for sorting mail, under the Royal Mail’s energetic addressing policy users can pick to add a county to an habitat as long as the pronounce town and postcode are included. The policy allows for the use of either the “former postal” (S. Humberside), “traditional” (Lincs.) or “administrative” (North Lincolnshire / North East Lincolnshire) county.