NP12 postcode district
NP12 holds 904 live postcodes around Blackwood, in Caerphilly.
Towns and villages with their centre in NP12
| # | Place | County / council | Population |
|---|---|---|---|
| 1 | Blackwood | Caerphilly County Borough | 15,476 |
Wards
| Name | Share of postcodes |
|---|---|
| Blackwood | 24% |
| Pontllanfraith | 24% |
| Cefn Fforest and Pengam | 20% |
| Penmaen | 16% |
| Argoed | 11% |
| Ynysddu | 1% |
| Maesycwmmer | 1% |
| St Cattwg | 1% |
| Newbridge | 0% |
| Aberbargoed and Bargoed | 0% |
And 3 more.
Westminster constituencies
| Name | Share of postcodes |
|---|---|
| Newport West and Islwyn | 59% |
| Caerphilly | 40% |
| Blaenau Gwent and Rhymney | 1% |
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. 26% of this district's postcodes sit in the most deprived three deciles, 23% 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 NP area
NP4 · NP7 · NP8 · NP10 · NP11 · NP13 · NP15 · NP16 · NP18 · NP19 · NP20 · NP22 · NP23 · NP24 · NP25 · NP26 · NP44
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.