S postcode area
The S postcode area, also known as the Sheffield postcode area,[2] is a group of postcode districts in England, which are subdivisions of eight post towns. These cover most of South Yorkshire (including Sheffield, Barnsley, Rotherham and Mexborough), parts of north Derbyshire (including Chesterfield, Dronfield and the Hope Valley) and north-west Nottinghamshire (including Worksop), plus a small part of West Yorkshire.
Similarly, there were also S-prefixed postal districts in the compass-based system used in Glasgow: Glasgow S1, S2, S3 and S4, which later became G41 to G44.
The S64 district covering the Mexborough post town was originally earmarked for use as DN13, which has never been used.
