# S21

Postcode district covering Killamarsh, Eckington and Westthorpe, in North East Derbyshire.

S21 is a postcode district covering Killamarsh, Eckington and Westthorpe, in North East Derbyshire. Median sale price £200,000 in 2025.

Postcode district. Code S21. In: [Postcodes](https://openindex.co.uk/postcode) › [S](https://openindex.co.uk/postcode/s)

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 S21 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £200,000** (2025). The median price paid for a home in S21 was £200,000 in 2025. Joint 372nd 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/s21#f-house-sales-median-price
- **Population: 20,248** (2021). S21 had 20,248 usual residents at the census (ONS Census 2021). 1,312th 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/s21#f-population
- **People in radon Affected Area squares: 100%** (2022). About 100% of people in S21 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/s21#f-radon-affected-share
- **Gigabit broadband coverage: 87.5%** (January 2026). In S21, 87.5% 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/s21#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas#place=S21) (Worked out by Open Index · 2022): About 100% of people in S21 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=S21) (Worked out by Open Index · 2025): 256 homes were sold in S21 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime#place=S21) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for S21.
- [Population by postcode district](https://openindex.co.uk/map/population#place=S21) (Census 2021, England and Wales): S21 had 20,248 usual residents at the census.

## How S21 compares

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

| Measure | S21 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £200,000 | joint 21st most expensive | 45 postcode districts, S · 2025 |
| Population | 20,248 | 13th least populated | 47 postcode districts, S · 2021 |
| People in radon Affected Area squares | 100% | joint most people in radon Affected Areas | 47 postcode districts, S · 2022 |
| Gigabit broadband coverage | 87.5% | 11th lowest | 47 postcode districts, S · Jan 2026 |

## Is S21 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in S21 at a rate of 69.6 per 1,000 people.
That compares with 109.1 per 1,000 people across the S postcode area.
In August 2026 alone, 124 cases of crime and anti-social behaviour were recorded in S21.
In the 12 months to August 2026, the most common types were violence and sexual offences (627), other crime (237) and anti-social behaviour (213).
A year earlier, the recorded crime rate in S21 was 62.2 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 S21, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so S21 has no single figure. Of its 13 neighbourhoods with a rank:
- Decile 2: 1 neighbourhood
- Decile 3: 2 neighbourhoods
- Decile 4: 1 neighbourhood
- Decile 5: 3 neighbourhoods
- Decile 6: 2 neighbourhoods
- Decile 7: 1 neighbourhood
- Decile 8: 2 neighbourhoods
- Decile 9: 1 neighbourhood

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

## Neighbourhoods in S21

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [North East Derbyshire 001A](https://openindex.co.uk/north-east-derbyshire/neighbourhood/e01019801) | 1,130 | 50.3 per 1,000 | 6 | 92.9% |
| [North East Derbyshire 001B](https://openindex.co.uk/north-east-derbyshire/neighbourhood/e01019802) | 1,344 | 63.4 per 1,000 | 6 | 92.9% |
| [North East Derbyshire 001C](https://openindex.co.uk/north-east-derbyshire/neighbourhood/e01019803) | 1,287 | 70.5 per 1,000 | 3 | 89.0% |
| [North East Derbyshire 001D](https://openindex.co.uk/north-east-derbyshire/neighbourhood/e01019804) | 1,260 | 15.8 per 1,000 | 8 | 25.5% |
| [North East Derbyshire 001E](https://openindex.co.uk/north-east-derbyshire/neighbourhood/e01019805) | 1,337 | 36.3 per 1,000 | 8 | 60.6% |
| [North East Derbyshire 001F](https://openindex.co.uk/north-east-derbyshire/neighbourhood/e01019806) | 1,438 | 63.8 per 1,000 | 7 | 86.3% |
| [North East Derbyshire 001G](https://openindex.co.uk/north-east-derbyshire/neighbourhood/e01019807) | 1,463 | 76.6 per 1,000 | 2 | 96.0% |
| [North East Derbyshire 002C](https://openindex.co.uk/north-east-derbyshire/neighbourhood/e01019790) | 1,789 | 37.0 per 1,000 | 9 | 97.9% |
| [North East Derbyshire 002D](https://openindex.co.uk/north-east-derbyshire/neighbourhood/e01019816) | 1,747 | 64.4 per 1,000 | 5 | 76.7% |
| [North East Derbyshire 014A](https://openindex.co.uk/north-east-derbyshire/neighbourhood/e01019791) | 1,961 | 77.4 per 1,000 | 5 | 92.0% |
| [North East Derbyshire 014B](https://openindex.co.uk/north-east-derbyshire/neighbourhood/e01019792) | 2,050 | 87.8 per 1,000 | 3 | 99.7% |
| [North East Derbyshire 014C](https://openindex.co.uk/north-east-derbyshire/neighbourhood/e01019815) | 2,662 | 103.3 per 1,000 | 5 | 88.0% |
| [North East Derbyshire 014D](https://openindex.co.uk/north-east-derbyshire/neighbourhood/e01032586) | 1,633 | 115.0 per 1,000 | 4 | 96.5% |

## Your MP

- [North East Derbyshire](https://openindex.co.uk/constituency/north-east-derbyshire): Louise Sandher-Jones (Labour), MP since July 2024. 99% of the people here.
- [Bolsover](https://openindex.co.uk/constituency/bolsover): Natalie Fleet (Labour), MP since July 2024. 1.5% 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 S21

[Eckington East & Renishaw](https://openindex.co.uk/north-east-derbyshire/eckington-east-and-renishaw), [Killamarsh](https://openindex.co.uk/north-east-derbyshire/killamarsh)

## Postcode sectors in S21

[S21 1 (187 postcodes)](https://openindex.co.uk/postcode/s21-1), [S21 2 (31 postcodes)](https://openindex.co.uk/postcode/s21-2), [S21 3 (55 postcodes)](https://openindex.co.uk/postcode/s21-3), [S21 4 (170 postcodes)](https://openindex.co.uk/postcode/s21-4), [S21 5 (24 postcodes)](https://openindex.co.uk/postcode/s21-5)

## Council

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

## Towns in S21

[Killamarsh](https://openindex.co.uk/town/killamarsh)

## Postcode districts next to S21

[S12](https://openindex.co.uk/postcode/s12), [S18](https://openindex.co.uk/postcode/s18), [S20](https://openindex.co.uk/postcode/s20), [S26](https://openindex.co.uk/postcode/s26), [S43](https://openindex.co.uk/postcode/s43)

## Nearest rail stations

[Halfway (2.9 km from the middle)](https://openindex.co.uk/map/rail-stations#around=-1.3443,53.3285), [Westfield (3.3 km from the middle)](https://openindex.co.uk/map/rail-stations#around=-1.3438,53.3319), [Waterthorpe (3.8 km from the middle)](https://openindex.co.uk/map/rail-stations#around=-1.3451,53.3365), [Beighton - Drake House Lane (4.4 km from the middle)](https://openindex.co.uk/map/rail-stations#around=-1.3475,53.3417)

## More in the S postcode area

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

## S21 in brief

S21 is a postcode district covering Killamarsh, Eckington and Westthorpe, in North East Derbyshire.
About 20,371 people lived in S21 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £200,000 in 2025 across 256 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 69.6 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in S21 was £200,000 in 2025.
S21 had 20,248 usual residents at the census.
About 100% of people in S21 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In S21, 87.5% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: S21
- Postcode area: [S](https://openindex.co.uk/postcode/s)
- Constituency: [North East Derbyshire †](https://openindex.co.uk/constituency/north-east-derbyshire)
- Council: [North East Derbyshire †](https://openindex.co.uk/north-east-derbyshire)
- Area: 21.64 km²
- People, mid-2024: 20,371*
- Neighbourhoods: 13
- Output areas: 68

* 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

[S43](https://openindex.co.uk/postcode/s43), [S26](https://openindex.co.uk/postcode/s26), [S20](https://openindex.co.uk/postcode/s20), [S12](https://openindex.co.uk/postcode/s12), [S18](https://openindex.co.uk/postcode/s18)

## Latest updates for S21

- 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/S21

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/s21, or to one figure with its anchor, https://openindex.co.uk/postcode/s21#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 2026.10.10. The HTML page: https://openindex.co.uk/postcode/s21