KML is from Wikidata The ST postcode area, also known as the Stoke-on-Trent postcode area, is a group of 21 postcode districts in England, within six post towns. These cover much of north and central Staffordshire (including Stoke-on-Trent, Stafford, Leek, Newcastle-under-Lyme, Stone and Uttoxeter), plus very small parts of Cheshire and Derbyshire.