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CO4

UK postcode district

Updated September 2026

District overview

Postcode units
1,722
Current units
1,193
Coordinate coverage
100%
Electoral wards
9

Coverage context

Countries represented
England
English regions represented
East of England
Local authority codes
2
Terminated postcode units
529

Postcode sectors in CO4

Choose a sector to browse its complete postcode-unit directory.

8 sectors

Property

Across this district

View property report
30,674 recorded sales at this postcode
Address Date Price
43, Wesley Avenue, Colchester, CO4 3AT 27 July 2026 £340,000
57, St Andrews Avenue, Colchester, CO4 3AJ 27 July 2026 £320,000
5, Sanitsky Way, Colchester, CO4 9AZ 24 July 2026 £470,000

Schools

Across this district

View schools report
Open schools
22
Primary
16
Secondary
3

Recorded crime

Across this district

View crime report
Published events
5,336
Months covered
12
Latest month
June 2026

Most recorded categories in this period

  • Violence and sexual offences 2,450
  • Shoplifting 454
  • Criminal damage and arson 412
  • Public order 407
  • Anti social behaviour 372

Census 2021

Population and age profile

CO4 usual residents
53,273
Age-profile population
53,128

Age bands in CO4

Postcode district
Age 0 to 14
18.4%

9,752 residents

Age 15 to 24
15.9%

8,447 residents

Age 25 to 44
28.4%

15,102 residents

Age 45 to 64
23%

12,227 residents

Age 65 and over
14.3%

7,600 residents

How to read these estimates
The standard postcode headcounts and the commissioned age table are separate ONS outputs. Small counts are disclosure-controlled, and totals can differ slightly between tables. Coverage is England and Wales only.

Census Day: 21 March 2021. Sources: ONS/Nomis P001-P004 and ONS CT21_0228. Age table version 2024-04-08.

Fixed broadband coverage

The median Ofcom availability percentage across 1,177 current postcode units in this district. Each postcode is weighted equally, not by premises.

Superfast, 30 Mbit/s+
100%
Ultrafast, 100 Mbit/s+
100%
Ultrafast, 300 Mbit/s+
100%
Gigabit-capable
100%
Unable to receive decent fixed or FWA broadband
0%
Next Generation Access
100%
Decent broadband available from fixed wireless
0%

1,118 postcode units had 100% superfast coverage, 922 had 100% gigabit-capable coverage, and 8 had at least some premises without decent fixed or fixed-wireless access.

Coverage is a modelled postcode-level snapshot, not a speed test or a guarantee for a named property. Check availability with providers before making a decision. Ofcom does not publish postcode-level full-fibre coverage in this release for commercial-confidentiality reasons.

Source: Ofcom Connected Nations Spring 2026, version 2026-01-v2. Contains Ofcom data licensed under the Open Government Licence v3.0.

NHS ODS

GP practices

4

in this district

  • BLUEBELL SURGERY

    BLUEBELL RESOURCE CENTRE, JACK ANDREWS DRIVE, HIGHWOODS, COLCHESTER, CO4 9YN

    ODS code F81746

  • HIGHWOODS SURGERY

    HIGHWOODS SQUARE, HIGHWOODS, COLCHESTER, CO4 9SR

    ODS code F81679

  • MILL ROAD SURGERY

    47 MILL ROAD, MILE END, COLCHESTER, CO4 5LE

    ODS code F81636

  • TURNER ROAD SURGERY

    THE PRIMARY CARE CENTRE, TURNER ROAD, COLCHESTER, CO4 5JR

    ODS code Y02646

Organisation records, not service availability
These are records marked active in NHS England's Organisation Data Service for England and Wales. Branch surgeries, pharmacies, dentists and hospitals are not included. They do not confirm patient registration, services, opening hours, appointments or care quality. Distances are straight-line from the postcode point.

Source acquired on 2026-09-03. Contains information from NHS England, licenced under the current version of the Open Government Licence.

Evidence in context

A factual reading of the data in this report's scope. It is not a location score or a recommendation.

Property market

Recorded sales

The five-year median is £309,000 from 4,039 recorded sales in CO4. This is a recorded-sale statistic, not a current valuation.

The latest UK House Price Index average for Colchester is £298,003 in June 2026, down 0.3% year on year.

Schools

Published establishments

22 open schools are in scope, including 16 primary and 3 secondary schools.

Counts describe active establishment records. They do not assess admissions, catchments or quality.

Recorded crime

Published police records

5,336 published events cover 12 months, averaging 444.667 events per published month. The largest recorded category is Violence and sexual offences with 2,450 events.

The source publishes anonymised street-level events. These figures are not a measure of safety for an individual address.