SK postcode district map, Stockport
Supplier statuses last checked .
The SK postcode area covers 19 districts and 16,696 live postcodes, from SK1 to SK23. It is centred on Macclesfield and also covers Stockport, Cheadle Hulme, Hyde, Romiley and Buxton.
Districts here average 879 postcodes.
Where the SK districts sit
1 district is plotted without a label where labels would overlap; every one is in the table below.
Where SK sits
It is administratively fragmented, reaching into Stockport, Cheshire East, Derbyshire and Tameside and 1 other authority.
Water supply across SK
All 19 SK districts are supplied by United Utilities. That makes SK simple in a way many areas are not: one company, one set of rules, one status to check.
No hosepipe ban currently applies anywhere in SK.
The shape of the SK area
SK10 is the largest district with 1,483 postcodes around Macclesfield, and SK22 the smallest with 388. The area divides into 105 postcode sectors.
The numbering is not continuous. SK runs up to 23 but has only 19 districts, so 4 numbers are unused:.
Several districts share a settlement, which is a common source of confusion when a form rejects an address: SK1, SK3, SK4 and SK5 all point at Stockport and SK10 and SK11 all point at Macclesfield.
What borders SK
SK sits next to M (Manchester) to the north west, OL (Oldham) to the north, WA (Warrington) to the west, BL (Bolton) to the north west and HD (Huddersfield) to the north east.
Its neighbours run in 4 different directions, so SK is landlocked by other postcode areas on most sides.
SK districts, settlements and water supply
| District | Principal settlement | Water company | Hosepipe ban status |
|---|---|---|---|
| SK1 | Stockport | United Utilities / Severn Trent | Depends on your supplier |
| SK2 | Hazel Grove | United Utilities / Severn Trent | Depends on your supplier |
| SK3 | Stockport | United Utilities / Severn Trent | Depends on your supplier |
| SK4 | Stockport | United Utilities / Severn Trent | Depends on your supplier |
| SK5 | Stockport | United Utilities / Severn Trent | Depends on your supplier |
| SK6 | Romiley | United Utilities / Severn Trent | Depends on your supplier |
| SK7 | Bramhall | United Utilities / Severn Trent | Depends on your supplier |
| SK8 | Cheadle Hulme | United Utilities / Severn Trent | Depends on your supplier |
| SK9 | Wilmslow | United Utilities / Severn Trent | Depends on your supplier |
| SK10 | Macclesfield | United Utilities / Severn Trent | Depends on your supplier |
| SK11 | Macclesfield | United Utilities / Severn Trent | Depends on your supplier |
| SK12 | Poynton | United Utilities / Severn Trent | Depends on your supplier |
| SK13 | Glossop | United Utilities / Severn Trent | Depends on your supplier |
| SK14 | Hyde | United Utilities / Severn Trent | Depends on your supplier |
| SK15 | Stalybridge | United Utilities / Severn Trent | Depends on your supplier |
| SK16 | Dukinfield | United Utilities / Severn Trent | Depends on your supplier |
| SK17 | Buxton | United Utilities / Severn Trent | Depends on your supplier |
| SK22 | New Mills | United Utilities / Severn Trent | Depends on your supplier |
| SK23 | Chapel-en-le-Frith | United Utilities / Severn Trent | Depends on 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 SK
No water company covering SK publishes hardness figures as open data. The gap is named per district below so you know who to ask.
United Utilities does not publish hardness as open data, but does publish a water hardness factsheet with a full band table and a postcode water quality checker.
| District | Hardness | As published | Supply zone | Published by |
|---|---|---|---|---|
| SK1 | Not published by United Utilities. Check with your supplier. | |||
| SK2 | Not published by United Utilities. Check with your supplier. | |||
| SK3 | Not published by United Utilities. Check with your supplier. | |||
| SK4 | Not published by United Utilities. Check with your supplier. | |||
| SK5 | Not published by United Utilities. Check with your supplier. | |||
| SK6 | Not published by United Utilities. Check with your supplier. | |||
| SK7 | Not published by United Utilities. Check with your supplier. | |||
| SK8 | Not published by United Utilities. Check with your supplier. | |||
| SK9 | Not published by United Utilities. Check with your supplier. | |||
| SK10 | Not published by United Utilities. Check with your supplier. | |||
| SK11 | Not published by United Utilities. Check with your supplier. | |||
| SK12 | Not published by United Utilities. Check with your supplier. | |||
| SK13 | Not published by United Utilities. Check with your supplier. | |||
| SK14 | Not published by United Utilities. Check with your supplier. | |||
| SK15 | Not published by United Utilities. Check with your supplier. | |||
| SK16 | Not published by United Utilities. Check with your supplier. | |||
| SK17 | Not published by United Utilities. Check with your supplier. | |||
| SK22 | Not published by United Utilities. Check with your supplier. | |||
| SK23 | Not published by United Utilities. 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 SK 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 SK area?
There are 19 SK postcode districts, running from SK1 to SK23, and they contain 16,696 live postcodes across 105 sectors.
What towns does the SK postcode area cover?
SK covers Macclesfield, Stockport, Cheadle Hulme, Hyde, Romiley and Buxton. The area takes its name from Macclesfield, and each district is listed with its settlement in the table on this page.
Which water company supplies SK postcodes?
United Utilities supplies all 19 SK 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 SK1 and SK3 both say Stockport?
SK1, SK3, SK4 and SK5 all serve Stockport, 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 SK postcode map?
Yes. This page offers the SK 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 SK area called Stockport when it covers Macclesfield?
SK takes its letters from Stockport, where the sorting office that served the area was based when the code was allocated. Macclesfield is the largest settlement in the area today, in SK10, but the area code follows the historic sorting geography rather than current population.
Which councils cover the SK postcode area?
SK reaches into Stockport, Cheshire East, Derbyshire, Tameside and Staffordshire. 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.