TW18 spans the counties of Surrey and Berkshire. It contains the town of Staines-upon-Thames, as well as Laleham, Church Lammas, Knowle Green, and Birch Green. TW18 is 28km west of the city of City of Westminster. TW18 is a postcode district, also known as an outcode or outbound code.
The below map shows where TW18 is, and the boundary of the TW18 postcode district:
Postal Boundaries © GEOLYTIX copyright and database right 2012
TW18 lies within the counties of Surrey and Berkshire. The below table and chart shows the split by area:
| County | % Area |
|---|---|
| Surrey | 97% |
| Berkshire | 3% |
| Staines-upon-Thames | Town |
| Laleham | Village |
| Church Lammas | Suburb |
| Knowle Green | Suburb |
| Birch Green | Suburb |
Position of TW18 relative to nearby towns. Distance is measured from the centre of TW18 to the centre of the town.
Position of TW18 relative to nearby cities. Distance is measured from the centre of TW18 to the centre of the city.