ST postcode district map, Stoke-on-Trent
Supplier statuses last checked .
The ST postcode area covers 22 districts and 17,871 live postcodes, from ST1 to ST55. It is centred on Stoke-on-Trent and also covers Stafford, Newcastle-under-Lyme, Kidsgrove, Cheadle and Leek.
Districts here average 812 postcodes.
Where the ST districts sit
4 districts are plotted without a label where labels would overlap; every one is in the table below.
Where ST sits
It falls across Staffordshire, City of Stoke-on-Trent and Cheshire East.
Water supply across ST
All 22 ST districts are supplied by South Staffs Water. That makes ST simple in a way many areas are not: one company, one set of rules, one status to check.
We are re-checking South Staffs Water's status. It was last confirmed on 18 August 2026 as voluntary appeal, and until it is confirmed again this page does not assert a current position for it.
The shape of the ST area
ST5 is the largest district with 2,044 postcodes around Newcastle-under-Lyme, and ST55 the smallest with 44. The area divides into 90 postcode sectors.
The numbering is not continuous. ST runs up to 55 but has only 22 districts, so 33 numbers are unused:.
Several districts share a settlement, which is a common source of confusion when a form rejects an address: ST1, ST2, ST3, ST4, ST6 and ST9 all point at Stoke-on-Trent, ST16, ST17 and ST18 all point at Stafford and ST5 and ST55 all point at Newcastle-under-Lyme.
What borders ST
ST sits next to WS (Walsall) to the south, TF (Telford) to the south west, CW (Crewe) to the north west, DE (Derby) to the east and WV (Wolverhampton) to the south.
Its neighbours run in 4 different directions, so ST is landlocked by other postcode areas on most sides.
ST districts, settlements and water supply
| District | Principal settlement | Water company | Hosepipe ban status |
|---|---|---|---|
| ST1 | Stoke-on-Trent | South Staffs Water / Severn Trent | Check with your supplier |
| ST2 | Stoke-on-Trent | South Staffs Water / Severn Trent | Check with your supplier |
| ST3 | Stoke-on-Trent | South Staffs Water / Severn Trent | Check with your supplier |
| ST4 | Stoke-on-Trent | South Staffs Water / Severn Trent | Check with your supplier |
| ST5 | Newcastle-under-Lyme | South Staffs Water / Severn Trent | Check with your supplier |
| ST6 | Stoke-on-Trent | South Staffs Water / Severn Trent | Check with your supplier |
| ST7 | Kidsgrove | South Staffs Water / Severn Trent | Check with your supplier |
| ST8 | Biddulph | South Staffs Water / Severn Trent | Check with your supplier |
| ST9 | Stoke-on-Trent | South Staffs Water / Severn Trent | Check with your supplier |
| ST10 | Cheadle | South Staffs Water / Severn Trent | Check with your supplier |
| ST11 | Cheadle | South Staffs Water / Severn Trent | Check with your supplier |
| ST12 | Stone | South Staffs Water / Severn Trent | Check with your supplier |
| ST13 | Leek | South Staffs Water / Severn Trent | Check with your supplier |
| ST14 | Uttoxeter | South Staffs Water / Severn Trent | Check with your supplier |
| ST15 | Stone | South Staffs Water / Severn Trent | Check with your supplier |
| ST16 | Stafford | South Staffs Water / Severn Trent | Check with your supplier |
| ST17 | Stafford | South Staffs Water / Severn Trent | Check with your supplier |
| ST18 | Stafford | South Staffs Water / Severn Trent | Check with your supplier |
| ST19 | Penkridge | South Staffs Water / Severn Trent | Check with your supplier |
| ST20 | Eccleshall | South Staffs Water / Severn Trent | Check with your supplier |
| ST21 | Eccleshall | South Staffs Water / Severn Trent | Check with your supplier |
| ST55 | Newcastle-under-Lyme | South Staffs Water / Severn Trent | Check with your supplier |
Principal settlement is the town or city each district sits in or nearest to, derived from OS Open Names. It is not the Royal Mail post town, which is licensed data and not published openly. Status is resolved live from each company’s own notice.
Water hardness in ST
No water company covering ST publishes hardness figures as open data. The gap is named per district below so you know who to ask.
| District | Hardness | As published | Supply zone | Published by |
|---|---|---|---|---|
| ST1 | Not published by South Staffs Water. Check with your supplier. | |||
| ST2 | Not published by South Staffs Water. Check with your supplier. | |||
| ST3 | Not published by South Staffs Water. Check with your supplier. | |||
| ST4 | Not published by South Staffs Water. Check with your supplier. | |||
| ST5 | Not published by South Staffs Water. Check with your supplier. | |||
| ST6 | Not published by South Staffs Water. Check with your supplier. | |||
| ST7 | Not published by South Staffs Water. Check with your supplier. | |||
| ST8 | Not published by South Staffs Water. Check with your supplier. | |||
| ST9 | Not published by South Staffs Water. Check with your supplier. | |||
| ST10 | Not published by South Staffs Water. Check with your supplier. | |||
| ST11 | Not published by South Staffs Water. Check with your supplier. | |||
| ST12 | Not published by South Staffs Water. Check with your supplier. | |||
| ST13 | Not published by South Staffs Water. Check with your supplier. | |||
| ST14 | Not published by South Staffs Water. Check with your supplier. | |||
| ST15 | Not published by South Staffs Water. Check with your supplier. | |||
| ST16 | Not published by South Staffs Water. Check with your supplier. | |||
| ST17 | Not published by South Staffs Water. Check with your supplier. | |||
| ST18 | Not published by South Staffs Water. Check with your supplier. | |||
| ST19 | Not published by South Staffs Water. Check with your supplier. | |||
| ST20 | Not published by South Staffs Water. Check with your supplier. | |||
| ST21 | Not published by South Staffs Water. Check with your supplier. | |||
| ST55 | Not published by South Staffs Water. Check with your supplier. | |||
Hardness is published per census area, not per postcode, so these figures characterise a district rather than measuring one address. They are a scale and taste matter, not a safety one. Hardness data version wessex-water@2022-2025+yorkshire-water@2026.
Download the ST data
No signup, no email wall. GeoJSON carries the district points, the supplier and the live status, so it can be dropped straight into a map.
District positions are averaged postcode centroids from OS Code-Point Open. They show roughly where a district sits, not where its boundary runs, and are not legal boundaries.
Frequently asked questions
How many postcode districts are in the ST area?
There are 22 ST postcode districts, running from ST1 to ST55, and they contain 17,871 live postcodes across 90 sectors.
What towns does the ST postcode area cover?
ST covers Stoke-on-Trent, Stafford, Newcastle-under-Lyme, Kidsgrove, Cheadle and Leek. The area takes its name from Stoke-on-Trent, and each district is listed with its settlement in the table on this page.
Which water company supplies ST postcodes?
South Staffs Water supplies all 22 ST districts. Supply boundaries follow the pipe network rather than postcode geography, so confirm against your water bill if you are near the edge of the area.
Why do ST1 and ST2 both say Stoke-on-Trent?
ST1, ST2, ST3, ST4, ST6 and ST9 all serve Stoke-on-Trent, covering different parts of it. A single town routinely needs more than one postcode district once it passes a few thousand delivery points, so this is normal rather than an error in an address.
Can I download a free ST postcode map?
Yes. This page offers the ST districts as GeoJSON, CSV and SVG, free and with no signup or email address required. The GeoJSON carries each district's position, its water company and its current restriction status, so it can be dropped straight into a mapping tool.
Why is the ST area called Stoke-on-Trent when it covers Newcastle-under-Lyme?
ST takes its letters from Stoke-on-Trent, where the sorting office that served the area was based when the code was allocated. Newcastle-under-Lyme is the largest settlement in the area today, in ST5, but the area code follows the historic sorting geography rather than current population.
Which councils cover the ST postcode area?
ST reaches into Staffordshire, City of Stoke-on-Trent and Cheshire East. A postcode area is not a council area: they were drawn for different purposes and a single district can sit across a council boundary, so your postcode does not tell you which authority you pay.