AL3 is in the county of Hertfordshire. It contains the city of St Albans, as well as Redbourn, St Stephens, Markyate, Bernards Heath, and Flamstead. AL3 is a postcode district, also known as an outcode or outbound code.
The below map shows where AL3 is, and the boundary of the AL3 postcode district:
Postal Boundaries © GEOLYTIX copyright and database right 2012
AL3 is in the county of Hertfordshire.
| St Albans | City |
| Redbourn | Village |
| St Stephens | Suburb |
| Markyate | Village |
| Bernards Heath | Suburb |
| Flamstead | Village |
| New Greens | Suburb |
| Townsend | Suburb |
| Friar's Wash | Hamlet |
| Roe End | Hamlet |
| Church End | Suburb |
| Trowley Bottom | Village |
| Holtsmere End | Hamlet |
| Childwick Green | Hamlet |
Position of AL3 relative to nearby towns. Distance is measured from the centre of AL3 to the centre of the town.
Position of AL3 relative to nearby cities. Distance is measured from the centre of AL3 to the centre of the city.