BL1 spans the counties of Greater Manchester and Lancashire. It contains the town of Bolton, as well as Astley Bridge, Halliwell, Heaton, Sharples, and Markland Hill. BL1 is 16km north-west of the city of Salford. BL1 is a postcode district, also known as an outcode or outbound code.
The below map shows where BL1 is, and the boundary of the BL1 postcode district:
Postal Boundaries © GEOLYTIX copyright and database right 2012
BL1 lies within the counties of Greater Manchester and Lancashire. The below table and chart shows the split by area:
| County | % Area |
|---|---|
| Greater Manchester | 97% |
| Lancashire | 3% |
| Bolton | Town |
| Astley Bridge | Suburb |
| Halliwell | Suburb |
| Heaton | Suburb |
| Sharples | Suburb |
| Markland Hill | Suburb |
| Smithills | Suburb |
| Gilnow | Suburb |
| Johnson Fold | Suburb |
| Doffcocker | Suburb |
| Delph Hill | Suburb |
| Brownlow Fold | Suburb |
| Cope Bank | Suburb |
| Back o' th' Bank | Suburb |
| Eagley Bank | Suburb |
| Horrocks Fold | Village |
| Victory | Suburb |
Position of BL1 relative to nearby towns. Distance is measured from the centre of BL1 to the centre of the town.
Position of BL1 relative to nearby cities. Distance is measured from the centre of BL1 to the centre of the city.