PO18 postcode district

Postcodes and sectors

700 of the district's 862 postcodes are live in the ONS Postcode Directory of August 2026. A postcode directory says whether a code is in use, never who is there. The live postcodes centre on 50.86458, -0.81631, which locates the district, not a building.

Companies registered in PO18

Companies House lists 954 companies with a registered office in PO18; none of them at an address shared by 25 or more companies (1 October 2026 snapshot). 25 is the count at which the address lookup reports a company cluster.

Places OS Open Names lists for PO18

• West Sussex
• South East
• Chichester
• Bosham
• Nutbourne
• Mid Lavant
• Westhampnett
• Hambrook
• Broadbridge
• Fishbourne
• Singleton
• Funtington
• Boxgrove
• West Ashling
• West Dean
• East Lavant
• Maudlin
• Chidham
• Halnaker
• East Dean
• West Stoke
• Compton
• West Marden
• Arun

Roads filed under PO18

Named roads first, then numbered ones. A road is filed under one district even where it runs through several, so a street missing here may be listed under a neighbouring district — which is why the address lookup never calls a British street absent. Great Britain has no open register of buildings, so a listed road never means a building on it exists.

• Abbotts Close
• Admirals Walk
• Aldingbourne Drive
• April Gardens
• Arnold Way
• Arundell Way
• Arundel Road
• Ashling Close
• Astra Close
• Augustus Way
• Aviary Close
• Baileys Way
• Barker Close
• Barnside
• Bentwood Way
• Bethwines Close
• Billy Fiske Close
• Binderton Lane
• Bira Mews
• Blackboy Lane
• Blackmill Lane
• Bleaches Court
• Blenheim Gardens
• Bosham Lane
• Bowhill Lane
• Brick Kiln Close
• Broadbridge Court
• Broadbridge Drive
• Broad Road
• Brook Avenue
• Brook Close
• Brook Meadows
• Brook Road
• Brooks Lane
• Burgess Close
• Butcher's Lane
• Cambria Close
• Canute Road
• Caspian Close
• Centurion Way
• Chalkpit Lane
• Chalk Road
• Chapel Lane
• Chapel Row
• Charlton Mill Way
• Charlton Road
• Cheesemans Lane
• Chequer Lane
• Chidham Lane
• Chidham Place
• Church Lane
• Churchmead Close
• Church Meadow
• Church Path
• Clark Drive
• Clay Lane
• Claypit Lane
• Coach Road
• Collins Crescent
• Common Road

Check an address in PO18

Check an address in PO18

The same road list through the API, from the outward code alone:

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=PO18" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about PO18

What does a PO18 postcode tell you?

That the address lies in the PO18 district of the PO (Portsmouth) postcode area, and the place OS Open Names most often lists first for its postcodes is Chichester. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 700 live postcodes.

Where the counts come from

• ons-postcode-directory · version 2026-08 · Contains ONS, OS and Royal Mail data © Crown copyright and database right 2026, Open Government Licence v3.0. Northern Ireland postcodes are excluded: their reuse needs a Land & Property Services licence.
• os-open-names · version 2026-11-01 · Contains OS data © Crown copyright and database right 2026, Open Government Licence v3.0.
• uk-companies-house · version 2026-10-01 · Companies House free company data product, Open Government Licence v3.0

What each figure means, and what a district page never says, is set out in Reading a British postcode district page; the glossary defines a postcode district, a postcode area, a postcode directory and a street register.

Data synced on 2026-11-01: the newest version among the datasets listed above.

Districts nearest PO18

• PO193.9 km
• PO108.0 km
• PO209.0 km
• PO911.8 km
• PO2112.0 km
• PO1113.8 km
• PO2213.8 km
• GU2914.2 km
• PO814.7 km
• PO715.9 km
• GU3115.9 km
• BN1816.0 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids