CA20 is in the county of Cumbria. It is 9km south-east of the town of Egremont, and contains Sellafield, Seascale, Gosforth, Nether Wasdale, and Ponsonby. CA20 is 59km north-west of the city of Lancaster. CA20 is a postcode district, also known as an outcode or outbound code.
The below map shows where CA20 is, and the boundary of the CA20 postcode district:
Postal Boundaries © GEOLYTIX copyright and database right 2012
CA20 is in the county of Cumbria.
| Sellafield | Settlement |
| Seascale | Village |
| Gosforth | Village |
| Nether Wasdale | Settlement |
| Ponsonby | Settlement |
| Wasdale Head | Hamlet |
| Calder Bridge | Village |
| Wellington | Village |
| New Mill | Hamlet |
| High Sellafield | Settlement |
Position of CA20 relative to nearby towns. Distance is measured from the centre of CA20 to the centre of the town.
Position of CA20 relative to nearby cities. Distance is measured from the centre of CA20 to the centre of the city.