Find SW1A 1ER in Westminster and explore the information recorded for it. The interactive map shows the postcode’s position and an approximate address-derived outline, with exact-postcode facts and wider neighbourhood statistics clearly identified below.
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Create a Custom MapCore details from the ONS Postcode Directory. Geography codes identify the official areas containing this postcode.
| Postcode | SW1A 1ER |
| Postcode without spaces | SW1A1ER |
| Status | Active postcode |
| User type | Small user postcode |
| Introduced | August 1992 |
| Directory version | 2026-06 |
| Latitude | 51.5063300 |
| Longitude | -0.1385070 |
| British National Grid | 529,287 E, 180,242 N |
| Country | England |
| Region | London |
| Local authority | Westminster |
| Output Area (2021) | E00023939 |
| LSOA (2021) | E01004736 |
| MSOA (2021) | E02000977 |
| Electoral ward | E05013806 |
| Westminster constituency | E14001172 |
The postcode is assigned to these official political geographies. Names and election results will be added when the ElectionMaps datasets are connected.
A detailed vector map covering a 500 metre radius around the postcode.
Deprivation is published for the postcode's containing Lower Layer Super Output Area, a neighbourhood geography covering more than one postcode.
Companies House records whose registered-office address uses this exact postcode.
Limited Liability Partnership
Incorporated 1 September 2023
None Supplied
Private Limited Company
Incorporated 31 August 2023
82990 - Other business support service activities n.e.c.
Private Limited Company
Incorporated 5 January 2018
82990 - Other business support service activities n.e.c.
Limited Liability Partnership
Incorporated 5 January 2018
None Supplied
Private Limited Company
Incorporated 13 May 2015
64205 - Activities of financial services holding companies
Private Limited Company
Incorporated 23 September 1980
None Supplied
Private Limited Company
Incorporated 4 March 1969
4531 - Installation electrical wiring etc.
Police.uk street-level incidents recorded across the postcode's containing LSOA in May 2026.
Westminster 018C includes SW1A 1ER and other nearby postcodes.
| Crime type | Incidents |
|---|---|
| Other theft | 104 |
| Theft from the person | 95 |
| Violence and sexual offences | 79 |
| Anti-social behaviour | 65 |
| Public order | 35 |
| Shoplifting | 20 |
| Drugs | 14 |
| Robbery | 12 |
| Vehicle crime | 11 |
| Possession of weapons | 8 |
| Bicycle theft | 5 |
| Burglary | 2 |
| Other crime | 2 |
Answers use the geographic scope stated with each dataset above.
SW1A 1ER is in Westminster, England.
The deprivation figures describe the containing Lower Layer Super Output Area, not only the individual postcode.
Vector Maps supplies editable UK postcode area, district and sector map files. For a vector or printed map focused on the full SW1A 1ER postcode and its approximate address-derived outline, request a custom map.
Explore other full postcodes in the same postcode sector.