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LL55 4

Postcode sector

240 live postcodes, all in Gwynedd.

A postcode has no figures of its own: each layer is published for whole councils, neighbourhoods or exact points. The figures below are for the whole of Gwynedd. Open the map at LL55 4 for neighbourhoods and points. Open the map at LL55 4

Your MP

As of , from the UK Parliament Members API. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.

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Deprivation by neighbourhood

Welsh Index of Multiple Deprivation 2025

Most deprived 10%Least

3 of Gwynedd’s 71 neighbourhoods are in Wales’s most deprived 20%.

Gwynedd, the council that holds 100% of LL55 4

Average house price
£204,974
Up 5.5% in a year
HM Land Registry · Jul 2026
Median full-time pay
£32,868
17th lowest paid of 348
ONS earnings survey · 2025
House price to pay
6.2×
106th most affordable of 348
Worked out by Open Index
Population estimate
120,295
Down 0.3% in a year
ONS population estimates · 2025

Everything about Gwynedd

Postcodes in LL55 4