Districts in the AL area
| District | Main place | Local authority | Sectors | Postcodes |
|---|---|---|---|---|
| AL1 | St Albans | St Albans | 6 | 1,217 |
| AL2 | London Colney | St Albans | 3 | 737 |
| AL3 | St Albans | St Albans | 5 | 955 |
| AL4 | St Albans | St Albans | 3 | 787 |
| AL5 | Harpenden | St Albans | 6 | 1,058 |
| AL6 | Welwyn | Welwyn Hatfield | 2 | 506 |
| AL7 | Welwyn Garden City | Welwyn Hatfield | 5 | 895 |
| AL8 | Welwyn Garden City | Welwyn Hatfield | 2 | 422 |
| AL9 | Hatfield | Welwyn Hatfield | 3 | 429 |
| AL10 | Hatfield | Welwyn Hatfield | 4 | 786 |
Main places in the AL area
- St Albans
- Welwyn Garden City
- Harpenden
- Hatfield
- London Colney
- Welwyn
- Bricket Wood
- Redbourn
- Oaklands
- How Wood
- Wheathampstead
- Welham Green
- Markyate
- Chiswell Green
- Brookmans Park
- Sandridge
- Colney Heath
- Park Street
- Frogmore
- Essendon
- Tewin
- Flamstead
- Blackmore End
- Tewin Wood
- North Mymms
- Lea Valley
- Smallford
- Stanborough
- Ayot Green
- Colney Street