Chelmsford
24 postcode sectors mapped mainly to Chelmsford. Choose a district or browse the guides below. These are postcode sectors, not named neighbourhood boundaries.
Postcode districts
Area guides
24 sectors
- CM1 1Near Chelmsford
- CM1 2Near Chelmsford
- CM1 3Near Writtle
- CM1 4Near Chignall St. James
- CM1 6Near Springfield
- CM1 7Near Broomfield
- CM1 9Near Chelmer
- CM11 1Near Ramsden Heath
- CM2 0Near Chelmsford
- CM2 5Near Chelmer
- CM2 6Near Chelmer
- CM2 7Near Sandon
- CM2 8Near Galleywood
- CM2 9Near Chelmsford
- CM3 1Near Ford End
- CM3 3Near Chelmsford Garden
- CM3 4Near Danbury
- CM3 5Near South Woodham Ferrers
- CM3 7Near South Woodham Ferrers
- CM3 8Near Rettendon
- CM3 9Near South Woodham Ferrers
- CM4 9Near Stock
- CM99 2Near Chelmer
- SS11 7Near Runwell
Authority grouping uses mapped sector boundaries from the Office for National Statistics, December 2025. It measures boundary area, not the number of addresses or residents. Guide names describe a place near the approximate sector centre.