Postcode CO1

Colchester · Essex, England

CO1 is the postcode of Colchester in Essex, England, United Kingdom. This list covers outward codes — the first half of a UK postcode, such as M9 or BN91 — not full postcodes.

Postcode: CO1
County: Essex
Country: England
Country: United Kingdom

Place with postcode CO1

Place	County	Location
Colchester	Essex	51.889, 0.904

Near London

The nearest major city is London, about 83 km away.

Local time
Weather forecast
Sunrise & sunset

Nearby postcodes

CB10
CB11
CB21
CB9
CM0
CM1
CM11
CM12
CM13
CM14
CM15
CM16
CM17
CM18
CM19
CM2
CM20
CM22
CM23
CM24
CM3
CM4
CM5
CM6

All postcodes in Essex →

Frequently asked questions

Which places use postcode CO1?

Colchester.

Which county and country is CO1 in?

Essex, England, United Kingdom.

What is the nearest major city to CO1?

London, about 83 km away.

Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.