CO9 postcode district
CO9 holds 928 live postcodes around Halstead, in Braintree.
Towns and villages with their centre in CO9
| # | Place | County / council | Population |
|---|---|---|---|
| 1 | Halstead | Essex | 11,906 |
| 2 | Sible Hedingham | Essex | 3,702 |
| 3 | Great Yeldham | Essex | 1,844 |
| 4 | Gosfield | Essex | 1,140 |
| 5 | Castle Hedingham | Essex | 1,063 |
| 6 | Ridgewell | Essex | 509 |
Wards
| Name | Share of postcodes |
|---|---|
| Halstead St Andrew's | 22% |
| Halstead Trinity | 20% |
| Hedingham | 19% |
| Gosfield & Greenstead Green | 14% |
| Yeldham | 10% |
| Stour Valley North | 6% |
| Stour Valley South | 4% |
| Bumpstead | 3% |
| The Colnes | 3% |
| Coggeshall | 0% |
And 1 more.
Westminster constituencies
| Name | Share of postcodes |
|---|---|
| Braintree | 97% |
| Witham | 3% |
Deprivation
The middle postcode here sits in decile 5 of the English Index of Multiple Deprivation (2021-Census LSOAs), where decile 1 is the most deprived tenth of neighbourhoods and 10 the least. 4% of this district's postcodes sit in the most deprived three deciles, 23% 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 CO area
CO1 · CO2 · CO3 · CO4 · CO5 · CO6 · CO7 · CO8 · CO10 · CO11 · CO12 · CO13 · CO14 · CO15 · CO16
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.