CO
16 districts, 13,759 postcodes
Colchester, Tendring, Babergh, Braintree, West Suffolk, Maldon
| District | Postcodes | Local authority |
|---|---|---|
| CO1 | 595 | Colchester |
| CO10 | 1,678 | Babergh |
| CO11 | 576 | Tendring |
| CO12 | 642 | Tendring |
| CO13 | 441 | Tendring |
| CO14 | 246 | Tendring |
| CO15 | 1,365 | Tendring |
| CO16 | 819 | Tendring |
| CO2 | 944 | Colchester |
| CO3 | 866 | Colchester |
| CO4 | 1,191 | Colchester |
| CO5 | 976 | Colchester |
| CO6 | 1,028 | Colchester |
| CO7 | 1,338 | Tendring |
| CO8 | 126 | Braintree |
| CO9 | 928 | Braintree |