Districts in the WD area
| District | Main place | Local authority | Sectors | Postcodes |
|---|---|---|---|---|
| WD3 | Rickmansworth | Three Rivers | 9 | 1,280 |
| WD4 | Kings Langley | Dacorum | 3 | 373 |
| WD5 | Abbots Langley | Three Rivers | 2 | 261 |
| WD6 | Borehamwood | Hertsmere | 6 | 1,075 |
| WD7 | Radlett | Hertsmere | 4 | 428 |
| WD17 | Watford | Watford | 4 | 572 |
| WD18 | Watford | Watford | 6 | 714 |
| WD19 | Watford | Three Rivers | 4 | 693 |
| WD23 | Bushey | Hertsmere | 5 | 769 |
| WD24 | Watford | Watford | 4 | 531 |
| WD25 | Watford | Watford | 4 | 687 |
| WD99 | Watford | Watford | 1 | 21 |
Main places in the WD area
- Watford
- Borehamwood
- Bushey
- Rickmansworth
- Chorleywood
- Radlett
- Abbots Langley
- Kings Langley
- Shenley
- Elstree
- Chipperfield
- Maple Cross
- Sarratt
- Aldenham
- Letchmore Heath
- Bedmond
- Rucklers Lane
- Patchetts Green
- West Hyde
- Chenies
- Chandler's Cross
- Woodcock Hill
- Bucks Hill
- Green Street
- Tower Hill
- Round Bush
- Shenleybury
- Hunton Bridge
- Moor Park
- Waterdale