ONS Coding System - Current GSS Coding System

Current GSS Coding System

The current system replaces these codes with a fixed length code of nine characters. The first three characters indicate the level of geography and the six digits following define the individual unit. For example the Royal Borough of Greenwich is coded as E09000011, Middlesbrough is E06000002, Cambridge E07000008 and Fenland E07000010.

The meaning of some common three character prefixes is as follows:

England Wales Scotland Northern Ireland Entity
E00 W00 S00 Census output area
E01 W01 S01 Super output area (smaller); Data zone (S)
E02 W02 S02 Super output area (larger); Intermediate zone (S)
E04 W04 Civil parish(E) Community (W)
E05 W05 S13 Ward or electoral division
W06 S12 Unitary authority
E06 Unitary authority (former shires)
E07 Non-metropolitan district (two-tier)
E08 Metropolitan borough
E09 London borough
E10 County
E12 English region
E14 W07 S14 N06 UK Parliamentary constituency
E15 W08 S15 N07 European electoral region
E32 W09 S16 London Assembly, Welsh Assembly, Scottish Parliament constituency
W10 S17 Welsh Assembly, Scottish Parliament electoral region
E26 W18 S21 National Park

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