The CM11 postcode district is a postal district with a population of 19,001 and is within the CM Chelmsford postcode area.
The area of the CM11 postcode district is 12.10 square miles which is 31.33 square kilometres or 7,741.68 acres.
There are 2 postcode sectors within the CM11 district.
| Town | Type |
|---|---|
| Billericay | Town |
| Brock Hill | Village |
| Crays Hill | Village |
| Downham | Village |
| Town | Type |
|---|---|
| Noak Hill | Village |
| Ramsden Bellhouse | Village |
| Ramsden Heath | Village |
| Wickford | Town |
| Postcode Sector | Delivery Office |
|---|---|
| CM11 1 | Billericay Delivery Office |
| CM11 2 | Billericay Delivery Office |
| C | M | 1 | 1 | - | X | X | X |
| C | M | 1 | 1 | Space | Numeric | Letter | Letter |
