CO4
Postcode districtPostcode district covering Colchester, Mile End and Greenstead, in Colchester.
Approximate outline worked out by Open Index from the ONS Postcode Directory: each census output area belongs to the district that holds most of its postcodes. People, homes, recorded crime and broadband add up those output areas. House sales count every sale with an CO4 postcode. How census figures are added up
Radon Affected Area by postcode district
Worked out by Open Index · 2022
About 0% of people in CO4 live in a 1 km square that the radon atlas marks as a radon Affected Area.
How CO4 compares
Each dot is a postcode district. The black line marks the middle one.
Is CO4 safe? What police records show
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in CO4 at a rate of 103.5 per 1,000 people.
That compares with 83.5 per 1,000 people across the CO postcode area.
In August 2026 alone, 498 cases of crime and anti-social behaviour were recorded in CO4.
In the 12 months to August 2026, the most common types were violence and sexual offences (2,545), other crime (1,036) and anti-social behaviour (600).
A year earlier, the recorded crime rate in CO4 was 94.1 per 1,000 people.
Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.
Rates are per resident, so places that many people work in or visit, such as Westminster, the City of London and other city centres, have far higher rates than their residents alone would suggest.
Deprivation in CO4, neighbourhood by neighbourhood
- Deprivation is ranked by neighbourhood, so CO4 has no single figure. Of its 34 neighbourhoods with a rank:
- Decile 1 (England’s most deprived 10%): 2 neighbourhoods
- Decile 2: 4 neighbourhoods
- Decile 3: 2 neighbourhoods
- Decile 4: 3 neighbourhoods
- Decile 6: 5 neighbourhoods
- Decile 7: 9 neighbourhoods
- Decile 8: 4 neighbourhoods
- Decile 9: 4 neighbourhoods
- Decile 10 (England’s least deprived 10%): 1 neighbourhood
English Indices of Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in England.
Neighbourhoods in CO4
| Name | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
|---|---|---|---|---|
| Colchester 001A | 1,367 | 61.4 per 1,000 | 7 | 87.8% |
| Colchester 001C | 2,104 | 40.7 per 1,000 | 7 | 70.2% |
| Colchester 002A | 1,544 | 42.8 per 1,000 | 6 | 98.4% |
| Colchester 002B | 1,431 | 92.1 per 1,000 | 3 | 99.3% |
| Colchester 002C | 1,445 | 163.1 per 1,000 | 4 | 95.5% |
| Colchester 002D | 1,447 | 69.6 per 1,000 | 8 | 99.7% |
| Colchester 002F | 2,074 | 68.2 per 1,000 | 7 | 92.7% |
| Colchester 002G | 1,747 | 30.1 per 1,000 | 9 | 97.9% |
| Colchester 008A | 1,552 | 274.3 per 1,000 | 1 | 97.7% |
| Colchester 008B | 1,724 | 141.9 per 1,000 | 2 | 99.5% |
| Colchester 008C | 1,550 | 78.4 per 1,000 | 4 | 81.7% |
| Colchester 008D | 1,463 | 128.6 per 1,000 | 2 | 96.2% |
| Colchester 008E | 1,390 | 292.5 per 1,000 | 1 | 91.1% |
| Colchester 008H | 1,629 | 205.2 per 1,000 | 2 | 83.5% |
| Colchester 017A | 2,402 | 72.9 per 1,000 | 9 | 45.5% |
| Colchester 022A | 1,439 | 34.1 per 1,000 | 8 | 83.2% |
| Colchester 022B | 1,492 | 41.0 per 1,000 | 8 | 97.6% |
| Colchester 022C | 2,315 | 38.9 per 1,000 | 9 | 97.3% |
| Colchester 022D | 1,341 | 83.6 per 1,000 | 6 | 87.1% |
| Colchester 022E | 1,345 | 73.4 per 1,000 | 2 | 100.0% |
| Colchester 022F | 1,492 | 156.1 per 1,000 | 3 | 99.0% |
| Colchester 022G | 1,958 | 59.6 per 1,000 | 6 | 91.3% |
| Colchester 022I | 1,368 | 77.5 per 1,000 | 4 | 99.5% |
| Colchester 023A | 1,114 | 79.2 per 1,000 | 6 | 44.0% |
| Colchester 023B | 1,671 | 143.2 per 1,000 | 7 | 93.8% |
| Colchester 023C | 1,396 | 122.0 per 1,000 | 7 | 98.0% |
| Colchester 023D | 1,487 | 69.6 per 1,000 | 7 | 98.9% |
| Colchester 023E | 1,116 | 154.3 per 1,000 | 7 | 94.3% |
| Colchester 023F | 1,883 | 41.4 per 1,000 | 10 | 82.8% |
| Colchester 024B | 1,272 | 345.4 per 1,000 | 8 | 79.0% |
| Colchester 024C | 1,476 | 43.7 per 1,000 | 7 | 85.5% |
| Colchester 024D | 1,723 | 88.4 per 1,000 | 6 | 76.0% |
| Colchester 024E | 1,706 | 117.0 per 1,000 | 9 | 97.8% |
| Colchester 024F | 1,349 | 63.6 per 1,000 | 7 | 47.2% |
MPs for CO4
- Pam CoxLabourMP for Colchester86% of CO4’s postcodes
- Sir Bernard JenkinConservativeMP for Harwich and North Essex14% of CO4’s postcodes
As of , from the UK Parliament Members API. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.
Middle areas in CO46
Postcode sectors in CO46
Council1
Towns in CO41
Postcode districts next to CO45
More in the CO postcode area2
CO4 in brief
CO4 is a postcode district covering Colchester, Mile End and Greenstead, in Colchester.
About 56,404 people lived in CO4 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £325,000 in 2025 across 698 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 103.5 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in CO4 was £325,000 in 2025.
CO4 had 53,410 usual residents at the census.
About 0% of people in CO4 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In CO4, 88.1% of homes and businesses could get gigabit-capable broadband in January 2026.