HD postcode area
The HD area holds 9 districts and 7,202 live postcodes; its largest place is Huddersfield.
| District | Live postcodes | Largest place with its centre there |
|---|---|---|
| HD1 | 842 | Huddersfield |
| HD2 | 634 | — |
| HD3 | 723 | — |
| HD4 | 734 | — |
| HD5 | 720 | — |
| HD6 | 800 | Brighouse |
| HD7 | 600 | Marsden |
| HD8 | 944 | Clayton West |
| HD9 | 1,205 | New Mill |
Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Source: Office for National Statistics licensed under the Open Government Licence v3.0. Postcode data is the ONS Postcode Directory, August 2026 edition; counts are live postcodes with a usable location. Northern Ireland postcodes carry a separate licence and are not included; Scotland joins when the site's Scottish coverage does.