OX postcode district map, Oxford
Supplier statuses last checked .
The OX postcode area covers 26 districts and 20,531 live postcodes, from OX1 to OX49. It is centred on Oxford and also covers Banbury, Bicester, Abingdon-on-Thames, Witney and Didcot.
Districts here average 790 postcodes.
Where the OX districts sit
6 districts are plotted without a label where labels would overlap; every one is in the table below.
Where OX sits
It is administratively fragmented, reaching into Oxfordshire, Gloucestershire, Warwickshire and West Berkshire and 2 other authorities.
Water supply across OX
All 26 OX districts are supplied by Thames Water, which is notable at this size: an area with this many districts usually crosses at least one supply boundary, and this one does not.
Thames Water has a hosepipe ban in force from 23 July 2026, covering the whole of OX.
The shape of the OX area
OX4 is the largest district with 1,367 postcodes around Oxford, and OX49 the smallest with 231. The area divides into 119 postcode sectors.
The numbering is not continuous. OX runs up to 49 but has only 26 districts, so 23 numbers are unused:.
Several districts share a settlement, which is a common source of confusion when a form rejects an address: OX1, OX2, OX3, OX4 and OX33 all point at Oxford, OX15, OX16 and OX17 all point at Banbury and OX25, OX26 and OX27 all point at Bicester.
What borders OX
OX sits next to HP (Hemel Hempstead) to the east, MK (Bletchley) to the north east, LU (Luton) to the east, RG (Reading) to the south and NN (Northampton) to the north east.
OX districts, settlements and water supply
| District | Principal settlement | Water company | Hosepipe ban status |
|---|---|---|---|
| OX1 | Oxford | Thames Water | Ban in force |
| OX2 | Oxford | Thames Water | Ban in force |
| OX3 | Oxford | Thames Water | Ban in force |
| OX4 | Oxford | Thames Water | Ban in force |
| OX5 | Kidlington | Thames Water | Ban in force |
| OX7 | Chipping Norton | Thames Water | Ban in force |
| OX9 | Thame | Thames Water | Ban in force |
| OX10 | Wallingford | Thames Water | Ban in force |
| OX11 | Didcot | Thames Water | Ban in force |
| OX12 | Wantage | Thames Water | Ban in force |
| OX13 | Abingdon-on-Thames | Thames Water | Ban in force |
| OX14 | Abingdon-on-Thames | Thames Water | Ban in force |
| OX15 | Banbury | Thames Water | Ban in force |
| OX16 | Banbury | Thames Water | Ban in force |
| OX17 | Banbury | Thames Water | Ban in force |
| OX18 | Carterton | Thames Water | Ban in force |
| OX20 | Woodstock | Thames Water | Ban in force |
| OX25 | Bicester | Thames Water | Ban in force |
| OX26 | Bicester | Thames Water | Ban in force |
| OX27 | Bicester | Thames Water | Ban in force |
| OX28 | Witney | Thames Water | Ban in force |
| OX29 | Witney | Thames Water | Ban in force |
| OX33 | Oxford | Thames Water | Ban in force |
| OX39 | Princes Risborough | Thames Water | Ban in force |
| OX44 | Watlington | Thames Water | Ban in force |
| OX49 | Watlington | 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 OX
No water company covering OX 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 |
|---|---|---|---|---|
| OX1 | Not published by Thames Water. Check with your supplier. | |||
| OX2 | Not published by Thames Water. Check with your supplier. | |||
| OX3 | Not published by Thames Water. Check with your supplier. | |||
| OX4 | Not published by Thames Water. Check with your supplier. | |||
| OX5 | Not published by Thames Water. Check with your supplier. | |||
| OX7 | Not published by Thames Water. Check with your supplier. | |||
| OX9 | Not published by Thames Water. Check with your supplier. | |||
| OX10 | Not published by Thames Water. Check with your supplier. | |||
| OX11 | Not published by Thames Water. Check with your supplier. | |||
| OX12 | Not published by Thames Water. Check with your supplier. | |||
| OX13 | Not published by Thames Water. Check with your supplier. | |||
| OX14 | Not published by Thames Water. Check with your supplier. | |||
| OX15 | Not published by Thames Water. Check with your supplier. | |||
| OX16 | Not published by Thames Water. Check with your supplier. | |||
| OX17 | Not published by Thames Water. Check with your supplier. | |||
| OX18 | Not published by Thames Water. Check with your supplier. | |||
| OX20 | Not published by Thames Water. Check with your supplier. | |||
| OX25 | Not published by Thames Water. Check with your supplier. | |||
| OX26 | Not published by Thames Water. Check with your supplier. | |||
| OX27 | Not published by Thames Water. Check with your supplier. | |||
| OX28 | Not published by Thames Water. Check with your supplier. | |||
| OX29 | Not published by Thames Water. Check with your supplier. | |||
| OX33 | Not published by Thames Water. Check with your supplier. | |||
| OX39 | Not published by Thames Water. Check with your supplier. | |||
| OX44 | Not published by Thames Water. Check with your supplier. | |||
| OX49 | 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 OX 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 OX area?
There are 26 OX postcode districts, running from OX1 to OX49, and they contain 20,531 live postcodes across 119 sectors.
What towns does the OX postcode area cover?
OX covers Oxford, Banbury, Bicester, Abingdon-on-Thames, Witney and Didcot. The area takes its name from Oxford, and each district is listed with its settlement in the table on this page.
Which water company supplies OX postcodes?
Thames Water supplies all 26 OX 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 OX1 and OX2 both say Oxford?
OX1, OX2, OX3, OX4 and OX33 all serve Oxford, 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 OX postcode map?
Yes. This page offers the OX 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 OX postcode area?
OX reaches into Oxfordshire, Gloucestershire, Warwickshire, West Berkshire, West Northamptonshire and Buckinghamshire. 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 OX6 postcode district?
OX6 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.