SY21 postcode district
SY21 holds 872 live postcodes around Welshpool, in Powys, Shropshire.
Towns and villages with their centre in SY21
| # | Place | County / council | Population |
|---|---|---|---|
| 1 | Welshpool | Sir Powys | 6,764 |
| 2 | Guilsfield | Sir Powys | 1,220 |
| 3 | Llanfair Caereinion | Sir Powys | 1,055 |
| 4 | Forden | Sir Powys | 745 |
| 5 | Berriew | Sir Powys | 283 |
Wards
| Name | Share of postcodes |
|---|---|
| Welshpool Castle | 15% |
| Llanfair Caereinion and Llanerfyl | 15% |
| Welshpool Gungrog | 12% |
| Berriew and Castle Caereinion | 11% |
| Trelystan and Trewern | 10% |
| Welshpool Llanerchyddol | 9% |
| Guilsfield | 8% |
| "Banwy | 6% |
| Forden and Montgomery | 6% |
| Rhiwcynon | 3% |
And 5 more.
Westminster constituencies
| Name | Share of postcodes |
|---|---|
| Montgomeryshire and Glyndwr | 98% |
| South Shropshire | 1% |
| Shrewsbury | 1% |
Deprivation
The middle postcode here sits in decile 4 of the English Index of Multiple Deprivation (2021-Census LSOAs), 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.
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. 9% of this district's postcodes sit in the most deprived three deciles, 22% 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 · SY22 · SY23 · 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.