Districts in the CM area
| District | Main place | Local authority | Sectors | Postcodes |
|---|---|---|---|---|
| CM0 | Burnham-on-Crouch | Maldon | 2 | 564 |
| CM1 | Chelmsford | Chelmsford | 7 | 1,561 |
| CM2 | Chelmsford | Chelmsford | 6 | 1,314 |
| CM3 | South Woodham Ferrers | Chelmsford | 9 | 1,588 |
| CM4 | Ingatestone | Brentwood | 2 | 442 |
| CM5 | Chipping Ongar | Epping Forest | 3 | 449 |
| CM6 | Great Dunmow | Uttlesford | 5 | 989 |
| CM7 | Braintree | Braintree | 7 | 1,349 |
| CM8 | Witham | Braintree | 4 | 924 |
| CM9 | Maldon | Maldon | 5 | 1,072 |
| CM11 | Billericay | Basildon | 2 | 453 |
| CM12 | Billericay | Basildon | 3 | 507 |
| CM13 | Brentwood | Brentwood | 3 | 702 |
| CM14 | Brentwood | Brentwood | 3 | 616 |
| CM15 | Brentwood | Brentwood | 3 | 596 |
| CM16 | Epping | Epping Forest | 5 | 639 |
| CM17 | Harlow | Harlow | 2 | 529 |
| CM18 | Harlow | Harlow | 2 | 430 |
| CM19 | Harlow | Harlow | 2 | 394 |
| CM20 | Harlow | Harlow | 4 | 629 |
| CM21 | Sawbridgeworth | East Hertfordshire | 3 | 319 |
| CM22 | Elsenham | Uttlesford | 2 | 560 |
| CM23 | Bishop's Stortford | East Hertfordshire | 7 | 1,200 |
| CM24 | Stansted Mountfitchet | Uttlesford | 2 | 274 |
| CM77 | Great Notley | Braintree | 3 | 462 |
| CM92 | Harlow | Harlow | 1 | 18 |
| CM98 | Chelmsford | Chelmsford | 1 | 19 |
| CM99 | Chelmsford | Chelmsford | 1 | 75 |
Main places in the CM area
- Chelmsford
- Harlow
- Brentwood
- Bishop's Stortford
- Braintree
- Billericay
- Witham
- Maldon
- Epping
- Great Dunmow
- South Woodham Ferrers
- Sawbridgeworth
- Stansted Mountfitchet
- Burnham-on-Crouch
- Ingatestone
- Great Notley
- Hatfield Peverel
- Chipping Ongar
- Danbury
- Writtle
- Elsenham
- Galleywood
- Southminster
- Broomfield
- Boreham
- Silver End
- Thaxted
- North Weald Bassett
- Theydon Bois
- Stock