LL21 postcode district
LL21 holds 368 live postcodes around Cynwyd, in Denbighshire, Conwy, Gwynedd.
Towns and villages with their centre in LL21
| # | Place | County / council | Population |
|---|---|---|---|
| 1 | Cynwyd | Denbighshire | 542 |
| 2 | Corwen | Denbighshire | 477 |
| 3 | Cerrigydrudion | Conwy | 289 |
Wards
| Name | Share of postcodes |
|---|---|
| Edeirnion | 54% |
| Uwch Aled | 22% |
| Llanfair Dyffryn Clwyd Gwyddelwern | 14% |
| Efenechdyd | 8% |
| Llandderfel | 3% |
Westminster constituencies
| Name | Share of postcodes |
|---|---|
| Dwyfor Meirionnydd | 57% |
| Bangor Aberconwy | 29% |
| Clwyd East | 14% |
Deprivation
The middle postcode here sits in decile 5 of the Welsh Index of Multiple Deprivation, Wales's own separate index, where decile 1 is the most deprived tenth of neighbourhoods and 10 the least. 0% of this district's postcodes sit in the most deprived three deciles, 0% in the least deprived three.
Deprivation deciles describe the LSOA neighbourhood each postcode sits in, weighted by postcodes rather than by people, because the postcode file carries no population. A district where the deprived neighbourhoods are densely populated will read better here than it would per resident.
Neighbouring districts in the LL area
LL11 · LL12 · LL13 · LL14 · LL15 · LL16 · LL17 · LL18 · LL19 · LL20 · LL22 · LL23 · LL24 · LL25 · LL26 · LL27 · LL28 · LL29 · LL30 · LL31 · LL32 · LL33 · LL34 · LL35 · LL36 · LL37 · LL38 · LL39 · LL40 · LL41 · LL42 · LL43 · LL44 · LL45 · LL46 · LL47 · LL48 · LL49 · LL51 · LL52 · LL53 · LL54 · LL55 · LL56 · LL57 · LL58 · LL59 · LL60 · LL61 · LL62 · LL63 · LL64 · LL65 · LL66 · LL67 · LL68 · LL69 · LL70 · LL71 · LL72 · LL73 · LL74 · LL75 · LL76 · LL77 · LL78
Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Source: Office for National Statistics licensed under the Open Government Licence v3.0. Postcode data is the ONS Postcode Directory, August 2026 edition; counts are live postcodes with a usable location. Northern Ireland postcodes carry a separate licence and are not included; Scotland joins when the site's Scottish coverage does.