E postcode district map, City of London
Supplier statuses last checked .
The E postcode area covers 22 districts and 17,022 live postcodes, from E1 to E1W. It is centred on City of London and also covers Chigwell.
Districts here average 774 postcodes.
Where the E districts sit
2 districts are plotted without a label where labels would overlap; every one is in the table below.
Where E sits
It falls across Greater London and Essex.
Water supply across E
All 22 E districts are supplied by Thames Water. That makes E simple in a way many areas are not: one company, one set of rules, one status to check.
Thames Water has a hosepipe ban in force from 23 July 2026, covering the whole of E.
The shape of the E area
The districts are wildly uneven: E14 holds 1,905 postcodes around City of London and E22 holds 19, a ratio of about 100 to one. They divide into 106 sectors.
The numbering is not continuous. E runs up to 98 but has only 22 districts, so 77 numbers are unused:.
Several districts share a settlement, which is a common source of confusion when a form rejects an address: E1, E2, E3, E5, E6, E8, E9, E10, E13, E14, E15, E16, E20, E22, E98 and E1W all point at City of London and E4, E7, E11, E12, E17 and E18 all point at Chigwell.
What borders E
E sits next to IG (Chigwell) to the north east, EC (City of London) to the south west, N (City of London) to the west, WC (London) to the south west and SE (City of London) to the south.
Its neighbours run in 4 different directions, so E is landlocked by other postcode areas on most sides.
E districts, settlements and water supply
| District | Principal settlement | Water company | Hosepipe ban status |
|---|---|---|---|
| E1 | City of London | Thames Water | Ban in force |
| E2 | City of London | Thames Water | Ban in force |
| E3 | City of London | Thames Water | Ban in force |
| E4 | Chigwell | Thames Water | Ban in force |
| E5 | City of London | Thames Water | Ban in force |
| E6 | City of London | Thames Water | Ban in force |
| E7 | Chigwell | Thames Water | Ban in force |
| E8 | City of London | Thames Water | Ban in force |
| E9 | City of London | Thames Water | Ban in force |
| E10 | City of London | Thames Water | Ban in force |
| E11 | Chigwell | Thames Water | Ban in force |
| E12 | Chigwell | Thames Water | Ban in force |
| E13 | City of London | Thames Water | Ban in force |
| E14 | City of London | Thames Water | Ban in force |
| E15 | City of London | Thames Water | Ban in force |
| E16 | City of London | Thames Water | Ban in force |
| E17 | Chigwell | Thames Water | Ban in force |
| E18 | Chigwell | Thames Water | Ban in force |
| E20 | City of London | Thames Water | Ban in force |
| E22 | City of London | Thames Water | Ban in force |
| E98 | City of London | Thames Water | Ban in force |
| E1W | City of London | Thames Water | Ban in force |
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 E
No water company covering E 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 |
|---|---|---|---|---|
| E1 | Not published by Thames Water. Check with your supplier. | |||
| E2 | Not published by Thames Water. Check with your supplier. | |||
| E3 | Not published by Thames Water. Check with your supplier. | |||
| E4 | Not published by Thames Water. Check with your supplier. | |||
| E5 | Not published by Thames Water. Check with your supplier. | |||
| E6 | Not published by Thames Water. Check with your supplier. | |||
| E7 | Not published by Thames Water. Check with your supplier. | |||
| E8 | Not published by Thames Water. Check with your supplier. | |||
| E9 | Not published by Thames Water. Check with your supplier. | |||
| E10 | Not published by Thames Water. Check with your supplier. | |||
| E11 | Not published by Thames Water. Check with your supplier. | |||
| E12 | Not published by Thames Water. Check with your supplier. | |||
| E13 | Not published by Thames Water. Check with your supplier. | |||
| E14 | Not published by Thames Water. Check with your supplier. | |||
| E15 | Not published by Thames Water. Check with your supplier. | |||
| E16 | Not published by Thames Water. Check with your supplier. | |||
| E17 | Not published by Thames Water. Check with your supplier. | |||
| E18 | Not published by Thames Water. Check with your supplier. | |||
| E20 | Not published by Thames Water. Check with your supplier. | |||
| E22 | Not published by Thames Water. Check with your supplier. | |||
| E98 | Not published by Thames Water. Check with your supplier. | |||
| E1W | Not published by Thames 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 E 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 E area?
There are 22 E postcode districts, running from E1 to E1W, and they contain 17,022 live postcodes across 106 sectors.
What towns does the E postcode area cover?
E covers City of London and Chigwell. The area takes its name from City of London, and each district is listed with its settlement in the table on this page.
Which water company supplies E postcodes?
Thames Water supplies all 22 E 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 E1 and E2 both say City of London?
E1, E2, E3, E5, E6, E8, E9, E10, E13, E14, E15, E16, E20, E22, E98 and E1W all serve City of London, 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 E postcode map?
Yes. This page offers the E 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.
Which councils cover the E postcode area?
E reaches into Greater London and Essex. 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.
Why is there no E19 postcode district?
E19 is not in use. Postcode districts are allocated as sorting requirements change rather than numbered straight through, and a code that is retired or never brought into service is not reissued, so gaps in the sequence are normal.