| Place | Post Code |
|---|---|
| Abberton, East of England) | CO5 |
| Aldham, East of England) | CO6 |
| Birch, East of England) | CO2 |
| Blackheath, East of England) | CO2 |
| Boxted, East of England) | CO4 |
| Braiswick, East of England) | CO4 5BN, CO4 5TX, CO4 … |
| Chappel, East of England) | CO6 |
| Colchester, East of England) | CO1, CO2, CO3, CO4 |
| Colchester Business Park, East of England) | CO4 |
| Copford, East of England) | CO6 |
| Dedham, East of England) | CO7 |
| East Mersea, East of England) | CO5 |
| Easthorpe, East of England) | CO5 |
| Postal Codes in Essex | |
|---|---|
| Basildon | |
| Braintree | |
| Brentwood | |
| Castle Point | |
| Chelmsford | |
| Colchester | |
| Epping Forest | |
| Harlow | |
| Maldon | |
| Rochford | |
| Tendring | |
| Uttlesford | |