About CO Postcodes
The CO postcode area contains 16 postcode districts and covers Colchester, Clacton-on-Sea, Sudbury, Manningtree and other areas. The total population across all districts is approximately 411,411.
Postcode Districts 16
CO1
611 postcodes
15,333 pop.
CO10
1,644 postcodes
46,604 pop.
CO11
557 postcodes
12,978 pop.
CO12
629 postcodes
22,251 pop.
CO13
434 postcodes
12,280 pop.
CO14
244 postcodes
6,660 pop.
CO15
1,358 postcodes
43,475 pop.
CO16
797 postcodes
23,608 pop.
CO2
944 postcodes
34,768 pop.
CO3
860 postcodes
28,502 pop.
CO4
1,167 postcodes
47,821 pop.
CO5
955 postcodes
28,207 pop.
CO6
1,012 postcodes
28,541 pop.
CO7
1,298 postcodes
32,912 pop.
CO8
124 postcodes
2,282 pop.
CO9
920 postcodes
25,189 pop.
Post Towns in CO Area
Colchester
Clacton-on-Sea
Sudbury
Manningtree
Harwich
Frinton-on-Sea
Walton-on-the-Naze
Bures
Halstead



