This section of the site is all about the CO Postcode area, also known as the Colchester Postal Area. Explore links to the next level to learn more about specific postcode districts such as CO1.

The CO postcode area represents a group of postal districts in the Colchester area of the United Kingdom. The area code CO stands for the letters c and o in COlchester. CO has a population of 411,418 and covers an area of 1,336,317 hectares. Fun fact: 0.63% of the population of Great Britain lives in this area.

The postcode area falls within the following counties: Essex (84.72%), Suffolk (15.28%).

Post Towns and Postcode Districts for the CO Postcode

COLCHESTER

CO6 Essex (73%), Suffolk (26%)

CO7 Essex (85%), Suffolk (14%)

BURES

CO8 Essex (57%), Suffolk (42%)

HALSTEAD

CO9 Essex

SUDBURY

CO10 Essex (9%), Suffolk (90%)

MANNINGTREE

CO11 Essex (81%), Suffolk (18%)

HARWICH

FRINTON-ON-SEA

WALTON ON THE NAZE

CLACTON-ON-SEA

Where is the CO Postcode Area?

The CO Colchester Postcode is in the East of England. The postal area borders the following neighbouring postal areas: CM - Chelmsford, CB - Cambridge and IP - Ipswich, It also borders The North Sea, Hamford Water, Harwich Harbour and The Thames Estuary.

Map of the CO Colchester Postcode Area

Explore the CO Colchester postcode area by using our interactive map.

Map Showing Location of the CO postcode area — Where is the CO Postcode Area

A word cloud for the CO postcode area — A word cloud for the CO Postcode Area

Postcode Districts within the CO Colchester Postcode Area

There are 16 postcode districts within the Colchester postcode area

A map showing the boundary of in relation to other areas

There are 13 towns within the Colchester postcode area.

Area of the CO postcode area
Unit	Area²
Hectares	1,336,317²
Miles	5,160²
Feet	143,839,825,563²
Kilometres	13,363²

Postal Delivery Offices serving the CO Colchester Postcode Area

Alresford (co) Scale Payment Delivery Office
Ardleigh Scale Payment Delivery Office
Boxford Scale Payment Delivery Office
Brightlingsea Delivery Office
Bures Scale Payment Delivery Office
Clacton-on-sea Delivery Office
Coggeshall Scale Payment Delivery Office
Colchester Delivery Office
Dedham Scale Payment Delivery Office
Earls Colne Scale Payment Delivery Office
East Bergholt Scale Payment Delivery Office
Eight Ash Green Scale Payment Delivery Office
Elmstead Scale Payment Delivery Office
Fingringhoe Scale Payment Delivery Office
Frinton-on-sea Delivery Office
Great Bentley Scale Payment Delivery Office
Great Bromley Scale Payment Delivery Office
Great Horkesley Scale Payment Delivery Office
Great Yeldham Scale Payment Delivery Office
Halstead Delivery Office
Harwich Delivery Office
Kelve Delivery Office N Scale Payment Delivery Office
Lexden Heath Scale Payment Delivery Office
Manningtree Delivery Office
Marks Tey Scale Payment Delivery Office
Nayland Scale Payment Delivery Office
Polstead Scale Payment Delivery Office
Rowhedge Scale Payment Delivery Office
Sible Hedingham Scale Payment Delivery Office
St. Osyth Scale Payment Delivery Office
Stoke By Nayland Scale Payment Delivery Office
Stratford St. Mary Scale Payment Delivery Office
Sudbury Delivery Office
Thorrington Scale Payment Delivery Office
Tiptree Delivery Office
Wakes Colne Scale Payment Delivery Office
Walton On The Naze Delivery Office
West Bergholt Scale Payment Delivery Office
West Mersea Postal Delivery Office
Wivenhoe Delivery Office

Postcode Areas Closest to CO

Councils with Postcodes in CO

Colchester District (B) (5158 postcodes)

Tendring District (4620 postcodes)

Babergh District (1779 postcodes)

Braintree District (1576 postcodes)

West Suffolk District (193 postcodes)

Maldon District (B) (22 postcodes)

CO Postcode Area for the Colchester Region