Chelmsford Postcode CM Postal Area
Postcode CM has post towns
Chelmsford contains 26 districts
- CM0 (Southminster, Burnham-on-crouch) Southminster, Bradwell, Tillingham, Asheldham, Dengie, Burnham-on-Crouch
- CM1 (Chelmsford) Chelmsford, Writtle
- CM2 (Chelmsford) Chelmsford
- CM3 (Chelmsford) Hatfield Peverel, South Woodham Ferrers, North Fambridge, Boreham, Maylandsea
- CM4 (Chelmsford) INGATESTONE
- CM5 (Chelmsford) ONGAR
- CM6 (Chelmsford) DUNMOW
- CM7 (Chelmsford) BRAINTREE
- CM8 (Chelmsford) WITHAM
- CM9 (Chelmsford) MALDON
- CM11 (Chelmsford) BILLERICAY
- CM12 (Chelmsford) Billericay (West)
- CM13 (Chelmsford) BRENTWOOD
- CM14 (Chelmsford) Brentwood, Harold Wood
- CM15 (Chelmsford) Brentwood, Doddinghurst, Kelvedon Hatch, Mountnessing, Shenfield, Stondon Massey
- CM16 (Chelmsford) EPPING
- CM17 (Chelmsford) HARLOW
- CM18 (Chelmsford) Harlow
- CM19 (Chelmsford) Harlow, Roydon
- CM20 (Chelmsford) Harlow
- CM21 (Chelmsford) SAWBRIDGEWORTH
- CM22 (Chelmsford) BISHOP'S STORTFORD
- CM23 (Chelmsford) Bishop's Stortford
- CM24 (Chelmsford) STANSTED
- CM77 (Chelmsford) BRAINTREE
- CM98 () Non-geographical
Chelmsford contains 17 non geographic sectors
- CM1 9 PO Boxes
- CM3 9 PO Boxes
- CM5 5 PO Boxes
- CM6 9 PO Boxes
- CM7 0 PO Boxes
- CM8 9 PO Boxes
- CM9 9 PO Boxes
- CM12 2 PO Boxes
- CM14 9 PO Boxes
- CM16 9 PO Boxes
- CM20 9 PO Boxes
- CM21 1 PO Boxes
- CM23 9 PO Boxes
- CM99 2 Selectapost Customers in CHELMSFORD & IFDS Group, CM2 5LG
- CM92 1 Shop Direct, Sandringham House, Sandringham Avenue, Harlow. (Posttown of Chelmsford for Mech purposes)
- CM99 1 Royal Mail Anglia, Divisional HQ, CHELMSFORD
- CM98 1 Mail Opening for DWP-Winsford Way, CHELMSFORD