# DN31

Postcode district covering Grimsby and West Marsh, in North East Lincolnshire.

DN31 is a postcode district covering Grimsby and West Marsh, in North East Lincolnshire. Median sale price £80,000 in 2025.

Postcode district. Code DN31. In: [Postcodes](https://openindex.co.uk/postcode) › [DN](https://openindex.co.uk/postcode/dn)

Approximate outline worked out by Open Index from the ONS Postcode Directory: each census output area belongs to the district that holds most of its postcodes. People, homes, recorded crime and broadband add up those output areas. House sales count every sale with an DN31 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £80,000** (2025). The median price paid for a home in DN31 was £80,000 in 2025. 4th cheapest of 2,235. Source: Worked out by Open Index from HM Land Registry Price Paid Data. Published 28 September 2026. https://openindex.co.uk/postcode/dn31#f-house-sales-median-price
- **Population: 9,938** (2021). DN31 had 9,938 usual residents at the census (ONS Census 2021). Joint 708th least populated of 2,756. Source: Census 2021, England and Wales and Scotland's Census 2022 and Census 2021, Northern Ireland, 2021. Published 21 July 2026. https://openindex.co.uk/postcode/dn31#f-population
- **People in radon Affected Area squares: 0%** (2022). About 0% of people in DN31 live in a 1 km square that the radon atlas marks as a radon Affected Area. UK 44%. Source: Worked out by Open Index from the UKHSA and BGS radon atlas and census output areas. Published 1 December 2022. https://openindex.co.uk/postcode/dn31#f-radon-affected-share
- **Gigabit broadband coverage: 86.8%** (January 2026). In DN31, 86.8% of homes and businesses could get gigabit-capable broadband in January 2026 (Ofcom). UK 87.8%. Source: Connected Nations (Ofcom), January 2026. Published 13 May 2026. https://openindex.co.uk/postcode/dn31#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas?place=DN31) (Worked out by Open Index · 2022): About 0% of people in DN31 live in a 1 km square that the radon atlas marks as a radon Affected Area.
- [Sales per year by postcode district](https://openindex.co.uk/map/house-sales-per-year?place=DN31) (Worked out by Open Index · 2025): 113 homes were sold in DN31 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime?place=DN31) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for DN31.
- [Population by postcode district](https://openindex.co.uk/map/population?place=DN31) (Census 2021, England and Wales): DN31 had 9,938 usual residents at the census.

## How DN31 compares

Each postcode district against every other postcode district the measure covers.

| Measure | DN31 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £80,000 | cheapest | 32 postcode districts, DN · 2025 |
| Population | 9,938 | 5th least populated | 32 postcode districts, DN · 2021 |
| People in radon Affected Area squares | 0% | joint fewest people in radon Affected Areas | 32 postcode districts, DN · 2022 |
| Gigabit broadband coverage | 86.8% | 7th lowest | 32 postcode districts, DN · Jan 2026 |

## Is DN31 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in DN31 at a rate of 416.1 per 1,000 people.
That compares with 116.1 per 1,000 people across the DN postcode area.
In August 2026 alone, 417 cases of crime and anti-social behaviour were recorded in DN31.
In the 12 months to August 2026, the most common types were violence and sexual offences (1,368), other crime (892) and shoplifting (842).
A year earlier, the recorded crime rate in DN31 was 365.5 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.

## Deprivation in DN31, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so DN31 has no single figure. Of its 6 neighbourhoods with a rank:
- Decile 1 (England’s most deprived 10%): 4 neighbourhoods
- Decile 2: 1 neighbourhood
- Decile 3: 1 neighbourhood

Source: English Indices of Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in England.

## Neighbourhoods in DN31

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [North East Lincolnshire 003A](https://openindex.co.uk/north-east-lincolnshire/neighbourhood/e01013218) | 1,294 | 206.6 per 1,000 | 1 | 97.8% |
| [North East Lincolnshire 003B](https://openindex.co.uk/north-east-lincolnshire/neighbourhood/e01013219) | 1,470 | 169.2 per 1,000 | 2 | 98.8% |
| [North East Lincolnshire 003C](https://openindex.co.uk/north-east-lincolnshire/neighbourhood/e01013220) | 1,571 | 155.9 per 1,000 | 1 | 99.4% |
| [North East Lincolnshire 003D](https://openindex.co.uk/north-east-lincolnshire/neighbourhood/e01013221) | 1,677 | 1,314.9 per 1,000 | 1 | 65.0% |
| [North East Lincolnshire 003E](https://openindex.co.uk/north-east-lincolnshire/neighbourhood/e01013222) | 1,532 | 331.5 per 1,000 | 1 | 96.4% |
| [North East Lincolnshire 008C](https://openindex.co.uk/north-east-lincolnshire/neighbourhood/e01013231) | 1,534 | 104.9 per 1,000 | 3 | 100.0% |

## Your MP

- [Great Grimsby and Cleethorpes](https://openindex.co.uk/constituency/great-grimsby-and-cleethorpes): Melanie Onn (Labour), MP since July 2024. 100% of the people here.
- [Brigg and Immingham](https://openindex.co.uk/constituency/brigg-and-immingham): Martin Vickers (Conservative), MP since July 2024. 0.4% of the people here.

As of 18 October 2026. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.

## Middle areas in DN31

[Grimsby West Marsh](https://openindex.co.uk/north-east-lincolnshire/grimsby-west-marsh)

## Postcode sectors in DN31

[DN31 1 (141 postcodes)](https://openindex.co.uk/postcode/dn31-1), [DN31 2 (214 postcodes)](https://openindex.co.uk/postcode/dn31-2), [DN31 3 (71 postcodes)](https://openindex.co.uk/postcode/dn31-3), [DN31 9 (32 postcodes)](https://openindex.co.uk/postcode/dn31-9)

## Council

[North East Lincolnshire](https://openindex.co.uk/north-east-lincolnshire)

## Towns in DN31

[Grimsby](https://openindex.co.uk/town/grimsby)

## Postcode districts next to DN31

[DN32](https://openindex.co.uk/postcode/dn32), [DN34](https://openindex.co.uk/postcode/dn34), [DN35](https://openindex.co.uk/postcode/dn35), [DN37](https://openindex.co.uk/postcode/dn37), [DN41](https://openindex.co.uk/postcode/dn41)

## Nearest rail stations

[Grimsby Town (1.0 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-0.0870,53.5634), [Grimsby Docks (1.1 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-0.0756,53.5743), [New Clee (2.1 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-0.0608,53.5744), [Great Coates (2.6 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-0.1302,53.5757)

## More in the DN postcode area

[All DN postcode districts](https://openindex.co.uk/postcode/dn), [Every UK postcode area](https://openindex.co.uk/postcode)

## DN31 in brief

DN31 is a postcode district covering Grimsby and West Marsh, in North East Lincolnshire.
About 10,577 people lived in DN31 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £80,000 in 2025 across 113 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 416.1 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in DN31 was £80,000 in 2025.
DN31 had 9,938 usual residents at the census.
About 0% of people in DN31 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In DN31, 86.8% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: DN31
- Postcode area: [DN](https://openindex.co.uk/postcode/dn)
- Constituency: [Great Grimsby and Cleethorpes †](https://openindex.co.uk/constituency/great-grimsby-and-cleethorpes)
- Council: [North East Lincolnshire †](https://openindex.co.uk/north-east-lincolnshire)
- Area: 6.83 km²
- People, mid-2024: 10,577*
- Neighbourhoods: 6
- Output areas: 36

* People: worked out by Open Index from neighbourhood estimates, shared out by where people lived at the census (by area in Northern Ireland). This area's edges do not follow neighbourhood edges, so the figure is close but not exact.
† Best fit: the constituency, council, region and nation this postcode district mostly lies in. Its edges do not follow theirs.

## Next door

[DN32](https://openindex.co.uk/postcode/dn32), [DN37](https://openindex.co.uk/postcode/dn37), [DN34](https://openindex.co.uk/postcode/dn34), [DN41](https://openindex.co.uk/postcode/dn41), [DN35](https://openindex.co.uk/postcode/dn35)

## Latest updates for DN31

- August 2026 house prices published: HM Land Registry and partners · Oct 2026.
- September 2026 rent published: ONS private rents · Oct 2026.
- Dental practices updated: NHS England · Oct 2026.
- Schools updated: Ofsted · Oct 2026.

The same figures as JSON: https://openindex.co.uk/v1/places/DN31

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/dn31, or to one figure with its anchor, https://openindex.co.uk/postcode/dn31#f-house-sales-median-price.

Open Index's own text and the figures it works out are licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source data keeps its publishers' licences, named with each figure. Give each figure's period and source with it.

Snapshot 2026.10.9. The HTML page: https://openindex.co.uk/postcode/dn31