SA1 postcode district

Postcodes and sectors

1,300 of the district's 2,376 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 51.62672, -3.94039, which locates the district, not a building.

Companies registered in SA1

Companies House lists 4,655 companies with a registered office in SA1; 1,598 of them at addresses 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 SA1

• Wales
• Abertawe
• Swansea
• Castell-nedd Port Talbot
• Neath Port Talbot
• Ty-draw

Roads filed under SA1

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.

• Aberdyberthi Street
• Abernethy Square
• Adelaide Street
• Aeron Place
• Afan Way
• Alamein Road
• Albert Row
• Alexandra Road
• Allaway Court
• Alun Road
• Argyle Street
• Baglan Street
• Balaclava Street
• Baldwin's Crescent
• Baptist Well Place
• Baptist Well Street
• Bargemans Row
• Bath Lane
• Bathurst Street
• Bay Street
• Bay View
• Bay View Crescent
• Bay View Terrace
• Beach Street
• Beaumont Crescent
• Belgrave Lane
• Bellerphon Court
• Belle Vue Way
• Bennett Street
• Benthall Place
• Berwick Terrace
• Berw Road
• Bethesda Street
• Bevans Row
• Blaen Cefn
• Bon-y-Maen Road
• Bond Street
• Bonville Terrace
• Bowen Street
• Brandon Crescent
• Branwen Gardens
• Bridge Street
• Brokesby Road
• Bronllan
• Brooklands Terrace
• Brunel Way
• Brunswick Street
• Bryn-Melyn Street
• Bryn-Syfi Terrace
• Bryn-y-Don Road
• Brynffordd
• Bryn Helyg
• Bryn Morfa
• Brynsifi Way
• Bryn Terrace
• Bryn y Clochydd
• Bryn y Coetir
• Brynymor Road
• Buckingham Road
• Bullin's Lane

Check an address in SA1

Check an address in SA1

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SA1" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SA1

What does an SA1 postcode tell you?

That the address lies in the SA1 district of the SA (Swansea) postcode area, and the place OS Open Names most often lists first for its postcodes is Abertawe. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,300 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 SA1

• SA53.3 km
• SA24.1 km
• SA75.6 km
• SA65.7 km
• SA49.1 km
• SA39.3 km
• SA1210.2 km
• SA1011.8 km
• SA812.4 km
• SA1113.5 km
• SA1315.1 km
• SA1416.6 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids