SP postcode district map, Salisbury
Supplier statuses last checked .
The SP postcode area covers 11 districts and 8,753 live postcodes, from SP1 to SP11. It is centred on Salisbury and also covers Wilton, Ludgershall, Amesbury, Andover and Shaftesbury.
Districts here average 796 postcodes.
Where the SP districts sit
1 district is plotted without a label where labels would overlap; every one is in the table below.
Where SP sits
It falls across Wiltshire, Hampshire and Dorset.
Water supply across SP
All 11 SP districts are supplied by Wessex Water. That makes SP simple in a way many areas are not: one company, one set of rules, one status to check.
Wessex Water has a hosepipe ban in force from 18 August 2026, covering the whole of SP.
The shape of the SP area
SP11 is the largest district with 1,297 postcodes around Ludgershall, and SP9 the smallest with 273. The area divides into 46 postcode sectors.
District by district: SP1 serves Salisbury, SP2 serves Wilton, SP3 serves Wilton, SP4 serves Amesbury, SP5 serves Salisbury, SP6 serves Fordingbridge, SP7 serves Shaftesbury, SP8 serves Gillingham, SP9 serves Tidworth, SP10 serves Andover and SP11 serves Ludgershall.
Several districts share a settlement, which is a common source of confusion when a form rejects an address: SP1 and SP5 all point at Salisbury and SP2 and SP3 all point at Wilton.
What borders SP
SP sits next to BH (Bournemouth) to the south, SO (Southampton) to the south east, BA (Bath) to the west, SN (Swindon) to the north and DT (Dorchester) to the south west.
Its neighbours run in 5 different directions, so SP is landlocked by other postcode areas on most sides.
SP districts, settlements and water supply
| District | Principal settlement | Water company | Hosepipe ban status |
|---|---|---|---|
| SP1 | Salisbury | Wessex Water / Southern Water | Depends on your supplier |
| SP2 | Wilton | Wessex Water / Southern Water | Depends on your supplier |
| SP3 | Wilton | Wessex Water / Southern Water | Depends on your supplier |
| SP4 | Amesbury | Wessex Water / Southern Water | Depends on your supplier |
| SP5 | Salisbury | Wessex Water / Southern Water | Depends on your supplier |
| SP6 | Fordingbridge | Wessex Water / Southern Water | Depends on your supplier |
| SP7 | Shaftesbury | Wessex Water / Southern Water | Depends on your supplier |
| SP8 | Gillingham | Wessex Water / Southern Water | Depends on your supplier |
| SP9 | Tidworth | Wessex Water / Southern Water | Depends on your supplier |
| SP10 | Andover | Wessex Water / Southern Water | Depends on your supplier |
| SP11 | Ludgershall | Wessex Water / Southern Water | 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 SP
Figures are in milligrams per litre as calcium carbonate, the unit UK water companies report in. 9 of 11 districts have a published figure.
| District | Hardness | As published | Supply zone | Published by |
|---|---|---|---|---|
| SP1 | 203–321 mg/l varies across this district | 288.8 mg/l as CaCO₃ | E01031984, E01031985, E01031986, E01032005 +19 more | Wessex Water 2022-2025 edition |
| SP2 | 293.1 mg/l That is hard on the water industry scale. | 293.1 mg/l as CaCO₃ | E01031980, E01031981, E01031982, E01031983 +10 more | Wessex Water 2022-2025 edition |
| SP3 | 278.3 mg/l That is hard on the water industry scale. | 278.3 mg/l as CaCO₃ | E01032004, E01032027, E01032029, E01032030 +2 more | Wessex Water 2022-2025 edition |
| SP4 | 220.6–291 mg/l varies across this district | 270.3 mg/l as CaCO₃ | E01031867, E01031974, E01031975, E01031976 +14 more | Wessex Water 2022-2025 edition |
| SP5 | 294.7 mg/l That is hard on the water industry scale. | 294.7 mg/l as CaCO₃ | E01031970, E01031971, E01031972 | Wessex Water 2022-2025 edition |
| SP6 | 296 mg/l That is hard on the water industry scale. | 296 mg/l as CaCO₃ | E01023011 | Wessex Water 2022-2025 edition |
| SP7 | 285.6 mg/l That is hard on the water industry scale. | 285.6 mg/l as CaCO₃ | E01020454, E01020456, E01020457, E01020460 +5 more | Wessex Water 2022-2025 edition |
| SP8 | 219.5–283.3 mg/l varies across this district | 266.8 mg/l as CaCO₃ | E01020440, E01020443, E01020447, E01020450 +7 more | Wessex Water 2022-2025 edition |
| SP9 | 285.3 mg/l That is hard on the water industry scale. | 285.3 mg/l as CaCO₃ | E01031849, E01031859, E01031860, E01034553 +3 more | Wessex Water 2022-2025 edition |
| SP10 | Not published by Wessex Water. Check with your supplier. | |||
| SP11 | Not published by Wessex Water. Check with your supplier. | |||
Descriptions such as very soft, soft, moderately hard, hard, very hard are the water industry scale: very soft below 75, soft 75–125, moderately hard 125–250, hard 250–375, very hard above 375 mg/l. Your supplier may use a different scale for the same number.
Contains Wessex Water drinking water quality data, via Stream, licensed under CC BY 4.0. Edition 2022-2025, published 1 January 2025.
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 SP 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 SP area?
There are 11 SP postcode districts, running from SP1 to SP11, and they contain 8,753 live postcodes across 46 sectors.
What towns does the SP postcode area cover?
SP covers Salisbury, Wilton, Ludgershall, Amesbury, Andover and Shaftesbury. The area takes its name from Salisbury, and each district is listed with its settlement in the table on this page.
Which water company supplies SP postcodes?
Wessex Water supplies all 11 SP 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 SP1 and SP5 both say Salisbury?
SP1 and SP5 all serve Salisbury, 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 SP postcode map?
Yes. This page offers the SP 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 SP area called Salisbury when it covers Ludgershall?
SP takes its letters from Salisbury, where the sorting office that served the area was based when the code was allocated. Ludgershall is the largest settlement in the area today, in SP11, but the area code follows the historic sorting geography rather than current population.
Which councils cover the SP postcode area?
SP reaches into Wiltshire, Hampshire and Dorset. 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.