CO postcode area

The CO postcode area, also known as the Colchester postcode area,[2] is a group of sixteen postcode districts in the east of England, within nine post towns.

These cover northeast Essex (including Colchester, Clacton-on-Sea, Frinton-on-Sea, Halstead, Harwich, Manningtree and Walton-on-the-Naze) and a small part of south Suffolk (including Bures and Sudbury).

The main sorting office is in Colchester.

The approximate coverage of the postcode districts:

CO postcode area map, showing postcode districts, post towns and neighbouring postcode areas. CB postcode area CM postcode area IP postcode area
CO postcode area map, showing postcode districts in red and post towns in grey text, with links to nearby CB , CM and IP postcode areas.