DL
Postcode areaPostcode area named after Darlington, with 18 districts.
Approximate outline worked out by Open Index from the ONS Postcode Directory: the outline joins its districts’ outlines, each made of the census output areas that hold most of the district’s postcodes.
Radon Affected Area by postcode area
Worked out by Open Index · 2022
About 45% of people in DL live in a 1 km square that the radon atlas marks as a radon Affected Area.
How DL compares
Each dot is a postcode area. The black line marks the middle one.
Every postcode area ranked: median sale price, population, people in radon affected area squares and gigabit broadband coverage.
Is DL safe? What police records show
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in DL at a rate of 111.8 per 1,000 people.
In August 2026 alone, 3,933 cases of crime and anti-social behaviour were recorded in DL.
In the 12 months to August 2026, the most common types were violence and sexual offences (14,365), anti-social behaviour (8,588) and other crime (6,386).
A year earlier, the recorded crime rate in DL was 104.9 per 1,000 people.
Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.
Rates are per resident, so places that many people work in or visit, such as Westminster, the City of London and other city centres, have far higher rates than their residents alone would suggest.
Postcode districts in DL
| Name | People (census) | Median sale price | Recorded crime per 1,000 |
|---|---|---|---|
| DL1Darlington, Firth Moor | 48,342 | £151,000 | 173.5 per 1,000 |
| DL2Middleton St George, Darlington | 18,384 | £247,498 | 74.0 per 1,000 |
| DL3Darlington, Pierremont | 43,044 | £175,000 | 93.8 per 1,000 |
| DL4Shildon, Sunnydale | 10,053 | £79,000 | 170.1 per 1,000 |
| DL5Newton Aycliffe, Woodham Village | 29,596 | £160,000 | 127.0 per 1,000 |
| DL6Northallerton | 15,212 | £245,000 | 71.1 per 1,000 |
| DL7Romanby, Northallerton | 16,085 | £249,750 | 60.3 per 1,000 |
| DL8Bedale, Leyburn | 19,140 | £289,998 | 32.5 per 1,000 |
| DL9Catterick Garrison, Walkerville | 14,643 | £187,000 | 56.1 per 1,000 |
| DL10Richmond, Anchorage Hill | 17,808 | £250,000 | 51.7 per 1,000 |
| DL11Reeth | 4,710 | £373,000 | 32.4 per 1,000 |
| DL12Barnard Castle | 12,418 | £251,250 | 71.2 per 1,000 |
| DL13Stanhope, Wolsingham | 13,538 | £160,000 | 76.1 per 1,000 |
| DL14Bishop Auckland, South Church | 37,840 | £125,000 | 165.3 per 1,000 |
| DL15Crook, Willington | 22,931 | £130,325 | 121.1 per 1,000 |
| DL16Spennymoor, Middlestone Moor | 22,419 | £145,000 | 136.2 per 1,000 |
| DL17Ferryhill, Chilton | 17,673 | £105,500 | 158.8 per 1,000 |
| DL98Darlington | No figure | No figure | No figure |
DL in brief
The DL postcode area, named after Darlington, has 18 postcode districts.
The median price paid for a home in DL was £180,000 in 2025.
DL had 363,836 usual residents at the census.
About 45% of people in DL live in a 1 km square that the radon atlas marks as a radon Affected Area.
In DL, 84.2% of homes and businesses could get gigabit-capable broadband in January 2026.