SY23 postcode district
SY23 holds 985 live postcodes around Aberystwyth, in Ceredigion, Powys.
Towns and villages with their centre in SY23
| # | Place | County / council | Population |
|---|---|---|---|
| 1 | Aberystwyth | County of Ceredigion | 18,749 |
| 2 | Penparcau | County of Ceredigion | 3,088 |
| 3 | Llanilar | County of Ceredigion | 1,085 |
| 4 | Llanrhystud | County of Ceredigion | 646 |
| 5 | Llan-non | County of Ceredigion | 598 |
| 6 | Devils Bridge | County of Ceredigion | 455 |
| 7 | Capel Bangor | County of Ceredigion | 256 |
Wards
| Name | Share of postcodes |
|---|---|
| Aberystwyth Morfa a Glais | 19% |
| Llanbadarn Fawr | 9% |
| Llanfarian | 9% |
| Melindwr | 9% |
| Ystwyth | 9% |
| Llansanffraid | 8% |
| Llanrhystyd | 8% |
| Aberystwyth Penparcau | 7% |
| Aberystwyth Rheidol | 7% |
| Faenor | 5% |
And 7 more.
Westminster constituencies
| Name | Share of postcodes |
|---|---|
| Ceredigion Preseli | 100% |
| "Brecon | 0% |
Deprivation
The middle postcode here sits in decile 6 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. 6% of this district's postcodes sit in the most deprived three deciles, 37% 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 SY area
SY1 · SY2 · SY3 · SY4 · SY5 · SY6 · SY7 · SY8 · SY9 · SY10 · SY11 · SY12 · SY13 · SY14 · SY15 · SY16 · SY17 · SY18 · SY19 · SY20 · SY21 · SY22 · SY24 · SY25 · SY99
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.