# SA3

Postcode district covering Swansea, Mumbles and West Cross, in Swansea.

SA3 is a postcode district covering Swansea, Mumbles and West Cross, in Swansea. Median sale price £370,000 in 2025. Recorded crime 42.4 per 1,000 people.

Postcode district. Code SA3. In: [Postcodes](https://openindex.co.uk/postcode) › [SA](https://openindex.co.uk/postcode/sa)

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 SA3 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £370,000** (2025). The median price paid for a home in SA3 was £370,000 in 2025. Joint 700th most expensive 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/sa3#f-house-sales-median-price
- **Population: 25,362** (2021). SA3 had 25,362 usual residents at the census (ONS Census 2021). 1,152nd most 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/sa3#f-population
- **People in radon Affected Area squares: 95%** (2022). About 95% of people in SA3 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/sa3#f-radon-affected-share
- **Gigabit broadband coverage: 80.0%** (January 2026). In SA3, 80.0% 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/sa3#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas?place=SA3) (Worked out by Open Index · 2022): About 95% of people in SA3 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=SA3) (Worked out by Open Index · 2025): 424 homes were sold in SA3 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime?place=SA3) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for SA3.
- [Population by postcode district](https://openindex.co.uk/map/population?place=SA3) (Census 2021, England and Wales): SA3 had 25,362 usual residents at the census.

## How SA3 compares

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

| Measure | SA3 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £370,000 | 2nd most expensive | 49 postcode districts, SA · 2025 |
| Population | 25,362 | 12th most populated | 52 postcode districts, SA · 2021 |
| People in radon Affected Area squares | 95% | joint 17th fewest people in radon Affected Areas | 52 postcode districts, SA · 2022 |
| Gigabit broadband coverage | 80.0% | 24th highest | 52 postcode districts, SA · Jan 2026 |

## Is SA3 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in SA3 at a rate of 42.4 per 1,000 people.
That compares with 86.6 per 1,000 people across the SA postcode area.
In August 2026 alone, 123 cases of crime and anti-social behaviour were recorded in SA3.
In the 12 months to August 2026, the most common types were violence and sexual offences (446), other crime (252) and anti-social behaviour (143).
A year earlier, the recorded crime rate in SA3 was 44.2 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 SA3, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so SA3 has no single figure. Of its 17 neighbourhoods with a rank:
- Decile 3: 2 neighbourhoods
- Decile 7: 1 neighbourhood
- Decile 8: 1 neighbourhood
- Decile 9: 1 neighbourhood
- Decile 10 (Wales’s least deprived 10%): 12 neighbourhoods

Source: Welsh Index of Multiple Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in Wales.

## Neighbourhoods in SA3

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [Swansea 028A](https://openindex.co.uk/swansea/neighbourhood/w01000736) | 1,748 | 18.7 per 1,000 | 10 | 77.7% |
| [Swansea 028B](https://openindex.co.uk/swansea/neighbourhood/w01000737) | 1,474 | 28.5 per 1,000 | 10 | 65.6% |
| [Swansea 028C](https://openindex.co.uk/swansea/neighbourhood/w01000804) | 1,422 | 36.9 per 1,000 | 10 | 95.2% |
| [Swansea 028D](https://openindex.co.uk/swansea/neighbourhood/w01000805) | 1,144 | 13.8 per 1,000 | 10 | 98.8% |
| [Swansea 029A](https://openindex.co.uk/swansea/neighbourhood/w01000879) | 1,679 | 14.2 per 1,000 | 10 | 100.0% |
| [Swansea 029B](https://openindex.co.uk/swansea/neighbourhood/w01000880) | 1,550 | 24.3 per 1,000 | 10 | 99.9% |
| [Swansea 029C](https://openindex.co.uk/swansea/neighbourhood/w01000881) | 1,316 | 189.7 per 1,000 | 3 | 97.7% |
| [Swansea 029D](https://openindex.co.uk/swansea/neighbourhood/w01000882) | 1,733 | 76.3 per 1,000 | 3 | 100.0% |
| [Swansea 030A](https://openindex.co.uk/swansea/neighbourhood/w01000775) | 1,626 | 31.7 per 1,000 | 7 | 36.3% |
| [Swansea 030B](https://openindex.co.uk/swansea/neighbourhood/w01000776) | 1,773 | 39.5 per 1,000 | 8 | 50.8% |
| [Swansea 030C](https://openindex.co.uk/swansea/neighbourhood/w01000839) | 1,044 | 26.9 per 1,000 | 9 | 71.7% |
| [Swansea 030D](https://openindex.co.uk/swansea/neighbourhood/w01000840) | 1,602 | 15.2 per 1,000 | 10 | 41.6% |
| [Swansea 031A](https://openindex.co.uk/swansea/neighbourhood/w01000823) | 1,820 | 10.7 per 1,000 | 10 | 87.1% |
| [Swansea 031B](https://openindex.co.uk/swansea/neighbourhood/w01000824) | 1,649 | 40.5 per 1,000 | 10 | 70.2% |
| [Swansea 031C](https://openindex.co.uk/swansea/neighbourhood/w01000825) | 1,283 | 67.8 per 1,000 | 10 | 97.1% |
| [Swansea 031D](https://openindex.co.uk/swansea/neighbourhood/w01000826) | 1,255 | 62.3 per 1,000 | 10 | 97.2% |
| [Swansea 031E](https://openindex.co.uk/swansea/neighbourhood/w01000827) | 1,249 | 48.2 per 1,000 | 10 | 94.3% |

## Your MP

- [Gower](https://openindex.co.uk/constituency/gower): Tonia Antoniazzi (Labour), MP since July 2024. 99% of the people here.
- [Neath and Swansea East](https://openindex.co.uk/constituency/neath-and-swansea-east): Carolyn Harris (Labour), MP since July 2024. 1.0% of the people here.
- [Swansea West](https://openindex.co.uk/constituency/swansea-west): Torsten Bell (Labour), MP since July 2024. 0.3% 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 SA3

[Mayals & Bishopston](https://openindex.co.uk/swansea/mayals-and-bishopston), [Mumbles & Newton](https://openindex.co.uk/swansea/mumbles-and-newton), [West Cross](https://openindex.co.uk/swansea/west-cross), [West Gower](https://openindex.co.uk/swansea/west-gower)

## Postcode sectors in SA3

[SA3 1 (119 postcodes)](https://openindex.co.uk/postcode/sa3-1), [SA3 2 (61 postcodes)](https://openindex.co.uk/postcode/sa3-2), [SA3 3 (88 postcodes)](https://openindex.co.uk/postcode/sa3-3), [SA3 4 (242 postcodes)](https://openindex.co.uk/postcode/sa3-4), [SA3 5 (210 postcodes)](https://openindex.co.uk/postcode/sa3-5), [SA3 9 (7 postcodes)](https://openindex.co.uk/postcode/sa3-9)

## Council

[Swansea](https://openindex.co.uk/swansea)

## Towns in SA3

[Swansea](https://openindex.co.uk/town/swansea)

## Postcode districts next to SA3

[SA2](https://openindex.co.uk/postcode/sa2), [SA4](https://openindex.co.uk/postcode/sa4)

## More in the SA postcode area

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

## SA3 in brief

SA3 is a postcode district covering Swansea, Mumbles and West Cross, in Swansea.
About 25,926 people lived in SA3 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £370,000 in 2025 across 424 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 42.4 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in SA3 was £370,000 in 2025.
SA3 had 25,362 usual residents at the census.
About 95% of people in SA3 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In SA3, 80.0% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: SA3
- Postcode area: [SA](https://openindex.co.uk/postcode/sa)
- Constituency: [Gower †](https://openindex.co.uk/constituency/gower)
- Council: [Swansea †](https://openindex.co.uk/swansea)
- Area: 142 km²
- People, mid-2024: 25,926*
- Neighbourhoods: 17
- Output areas: 92

* 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 and nation this postcode district mostly lies in. Its edges do not follow theirs.

## Next door

[SA2](https://openindex.co.uk/postcode/sa2), [SA4](https://openindex.co.uk/postcode/sa4)

## Latest updates for SA3

- 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/SA3

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/sa3, or to one figure with its anchor, https://openindex.co.uk/postcode/sa3#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/sa3