CM20 postcode district
CM20 holds 629 live postcodes around Harlow, in Harlow, East Hertfordshire.
Wards
| Name | Share of postcodes |
|---|---|
| Little Parndon & Town Centre | 40% |
| Mark Hall | 31% |
| Netteswell | 23% |
| Hunsdon | 5% |
| Much Hadham | 0% |
| Passmores | 0% |
| Old Harlow | 0% |
| Sawbridgeworth | 0% |
| Bush Fair | 0% |
| Latton Bush & Stewards | 0% |
Westminster constituencies
| Name | Share of postcodes |
|---|---|
| Harlow | 95% |
| Hertford and Stortford | 5% |
Deprivation
The middle postcode here sits in decile 3 of the English Index of Multiple Deprivation (2021-Census LSOAs), where decile 1 is the most deprived tenth of neighbourhoods and 10 the least. 53% of this district's postcodes sit in the most deprived three deciles, 5% in the least deprived three.
Deprivation deciles describe the LSOA neighbourhood each postcode sits in, weighted by postcodes rather than by people, because the postcode file carries no population. A district where the deprived neighbourhoods are densely populated will read better here than it would per resident.
Neighbouring districts in the CM area
CM0 · CM1 · CM2 · CM3 · CM4 · CM5 · CM6 · CM7 · CM8 · CM9 · CM11 · CM12 · CM13 · CM14 · CM15 · CM16 · CM17 · CM18 · CM19 · CM21 · CM22 · CM23 · CM24 · CM77 · CM92 · CM98 · CM99
Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Source: Office for National Statistics licensed under the Open Government Licence v3.0. Postcode data is the ONS Postcode Directory, August 2026 edition; counts are live postcodes with a usable location. Northern Ireland postcodes carry a separate licence and are not included; Scotland joins when the site's Scottish coverage does.