Postal Code Finder
Registry / United Kingdom / Postal code prefixes / SW1 / SW18 /

Postal code SW18 in Earlsfield, United Kingdom

Postal code SW18 is mapped to 5 locality records in United Kingdom with administrative hierarchy and coordinates.

Verified data profile for Postal code SW18

Based on 5 records, 1 postal code values and 5 mapped localities. Coordinate coverage is 100.0%.

5
Records
1
Postal identifiers
100.0%
Geocoded
SW18
Example code
Postal code Locality Administrative path Coordinates
SW18 Earlsfield England / Greater London 51.4439, -0.1854
SW18 Southfields England / Greater London 51.4453, -0.2041
SW18 Wandsworth England / Greater London 51.4577, -0.2078
SW18 Wandsworth Town England / Greater London 51.4488, -0.1941
SW18 West Hill England / Greater London 51.4488, -0.1941

Related postal lookups

United Kingdom
Country
Postal code prefixes
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Prefix SW1
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SW14
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SW15
Nearby postal code · 6 records
SW16
Nearby postal code · 3 records
SW17
Nearby postal code · 6 records
SW19
Nearby postal code · 6 records
SW1A
Nearby postal code · 1 records

Postal code validation data

Use this page to validate one postal code or locality against real parent areas, nearby records and downloadable source rows. The canonical route for this record set is /postal-codes/united-kingdom/code/sw18.

Records
5
Database rows represented by this canonical route.
Postal identifiers
1
Distinct postal code values available for this page.
Localities
5
Mapped place names or administrative entries.
Coordinate coverage
100.0%
Rows with latitude and longitude available.
Example
SW18
Sample code from Earlsfield.
Code Place Hierarchy Coordinates
SW18 Earlsfield England / Greater London 51.4439, -0.1854
SW18 Southfields England / Greater London 51.4453, -0.2041
SW18 Wandsworth England / Greater London 51.4577, -0.2078
SW18 Wandsworth Town England / Greater London 51.4488, -0.1941
SW18 West Hill England / Greater London 51.4488, -0.1941
Download postal data
CSV, JSON and XLSX exports for research, validation and data products.
Use the API
Query postal codes by country, place name, region or code prefix.
Implementation notes
Field definitions, canonical paths and practical lookup guidance.

Useful related pages

United Kingdom
Country
Postal code prefixes
Postal code prefixes
Prefix SW1
Postal code range · 19 records
SW14
Nearby postal code · 2 records
SW15
Nearby postal code · 6 records
SW16
Nearby postal code · 3 records
SW17
Nearby postal code · 6 records
SW19
Nearby postal code · 6 records
SW1A
Nearby postal code · 1 records

Data questions

How should I validate SW18?

Validate the postal identifier together with country, locality and administrative hierarchy fields, not as a standalone global pattern.

What context is available for this record?

The page includes the parent country, related prefix or nearby codes, coordinates when available and source rows for download/API workflows.

Postal code range

This code belongs to the SW1 prefix range for United Kingdom.

View all SW1 postal codes

How to validate postal code SW18

Treat SW18 as a text value, not a number. Postal identifiers can contain leading zeroes, spaces or letters in other countries, so applications should validate the country and original string together. For this page, the code is valid when it appears with one of the mapped localities below and the administrative path belongs to United Kingdom.

United Kingdom lookup
Open the country-level hierarchy and dataset exports.
Browse all prefixes
Compare this code with neighboring country ranges.
Prefix SW1
View related codes in the same prefix range.

Mapped localities

Earlsfield
England / Greater London
51.4439, -0.1854
Southfields
England / Greater London
51.4453, -0.2041
Wandsworth
England / Greater London
51.4577, -0.2078
Wandsworth Town
England / Greater London
51.4488, -0.1941
West Hill
England / Greater London
51.4488, -0.1941

Common lookup mistakes

A postal code can map to more than one locality record, and the same locality name can appear in different administrative areas. Always compare the country, postal code, place name and region together before treating a match as final.

Coordinates on this page are useful for map previews and approximate area checks. They should be read as locality or postal-area centroids, not as exact delivery addresses. For bulk validation, download the country dataset and keep this canonical URL as the human-readable reference for the code.

Nearby postal code lookups

These neighboring identifiers help compare adjacent code ranges inside United Kingdom. Each link opens a canonical postal-code page with its mapped places and administrative context.

SW14
East Sheen
SW15
East Putney
SW16
Norbury
SW17
Furzedown
SW19
Colliers Wood
SW1A
Westminster Abbey
SW1E
London
SW1H
London