DL12 postcode district
DL12 holds 726 live postcodes around Barnard Castle, in County Durham, North Yorkshire, Westmorland and Furness.
Towns and villages with their centre in DL12
| # | Place | County / council | Population |
|---|---|---|---|
| 1 | Barnard Castle | County Durham | 7,040 |
| 2 | Middleton in Teesdale | County Durham | 934 |
| 3 | Cotherstone | County Durham | 594 |
| 4 | Mickleton | County Durham | 413 |
Wards
| Name | Share of postcodes |
|---|---|
| Upper Teesdale | 58% |
| Barnard Castle | 25% |
| Lower Teesdale | 17% |
| North Richmondshire | 0% |
| Eden and Lyvennet Vale | 0% |
Westminster constituencies
| Name | Share of postcodes |
|---|---|
| Bishop Auckland | 100% |
| Richmond and Northallerton | 0% |
| Westmorland and Lonsdale | 0% |
Deprivation
The middle postcode here sits in decile 5 of the English Index of Multiple Deprivation (2021-Census LSOAs), where decile 1 is the most deprived tenth of neighbourhoods and 10 the least. 8% of this district's postcodes sit in the most deprived three deciles, 5% 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 DL area
DL1 · DL2 · DL3 · DL4 · DL5 · DL6 · DL7 · DL8 · DL9 · DL10 · DL11 · DL13 · DL14 · DL15 · DL16 · DL17 · DL98
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.