AL9 postcode district
AL9 holds 429 live postcodes around Brookmans Park, in Welwyn Hatfield, East Hertfordshire.
Towns and villages with their centre in AL9
| # | Place | County / council | Population |
|---|---|---|---|
| 1 | Brookmans Park | Hertfordshire | 4,000 |
| 2 | Welham Green | Hertfordshire | 3,000 |
| 3 | Essendon | Hertfordshire | 580 |
| 4 | North Mymms | Hertfordshire | 274 |
Wards
| Name | Share of postcodes |
|---|---|
| Brookmans Park and Little Heath | 42% |
| Welham Green and Hatfield South | 30% |
| Hatfield East | 26% |
| Hatfield Central | 2% |
| Hertford Rural | 0% |
Westminster constituencies
| Name | Share of postcodes |
|---|---|
| Welwyn Hatfield | 100% |
| North East Hertfordshire | 0% |
Deprivation
The middle postcode here sits in decile 8 of the English Index of Multiple Deprivation (2021-Census LSOAs), where decile 1 is the most deprived tenth of neighbourhoods and 10 the least. 2% of this district's postcodes sit in the most deprived three deciles, 58% in the least deprived three.
Deprivation deciles describe the LSOA neighbourhood each postcode sits in, weighted by postcodes rather than by people, because the postcode file carries no population. A district where the deprived neighbourhoods are densely populated will read better here than it would per resident.
Neighbouring districts in the AL area
AL1 · AL2 · AL3 · AL4 · AL5 · AL6 · AL7 · AL8 · AL10
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.