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Swiss Valley & Llangennech

Middle area

South Carmarthenshire. 7,587 people (mid-2024 estimate) in 22 square kilometres.

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Radon Affected Area by middle area

Worked out by Open Index · 2022

Under 1%90% or more

About 100% of people in Swiss Valley & Llangennech live in a 1 km square that the radon atlas marks as a radon Affected Area.

Median sale price
£205,000
Joint 1,588th cheapest of 7,259
Worked out by Open Index
Population
7,653
Joint 4,154th most populated of 9,448
ONS Census 2021 · 2021
People in radon Affected Area squares
100%
UK 44%
Worked out by Open Index
Gigabit broadband coverage
91.4%
UK 87.8%
Ofcom · Jan 2026

Recorded crime in Swiss Valley & Llangennech

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Swiss Valley & Llangennech at a rate of 40.9 per 1,000 people.

That compares with 86.7 per 1,000 people across Carmarthenshire.

Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.

Recorded by police, 12 months to August 2026
Kind of crimeRecorded
Violence and sexual offences153
Other crime64
Anti-social behaviour32
Criminal damage and arson31
Drug offences10
Vehicle crime10
Burglary8
Robbery1
Shoplifting1
Theft from the person0

Source: police.uk, 12 months to August 2026

How Swiss Valley & Llangennech compares

Each dot is a middle area. The black line marks the middle one.

Swiss Valley & LlangennechMiddle
Median sale price25 middle areas, Carmarthenshire · 2025
Median sale price: every middle area in Carmarthenshire25 areas from £127,000 to £290,000. The middle area is £199,500. Swiss Valley & Llangennech is £205,000.
£205,00012th most expensive
Population25 middle areas, Carmarthenshire · 2021
Population: every middle area in Carmarthenshire25 areas from 5,195 to 12,255. The middle area is 7,435. Swiss Valley & Llangennech is 7,653.
7,65311th most populated
People in radon Affected Area squares25 middle areas, Carmarthenshire · 2022
People in radon Affected Area squares: every middle area in Carmarthenshire25 areas from 27.0% to 100.0%. The middle area is 100.0%. Swiss Valley & Llangennech is 100.0%.
100%joint most people in radon Affected Areas
Gigabit broadband coverage25 middle areas, Carmarthenshire · Jan 2026
Gigabit broadband coverage: every middle area in Carmarthenshire25 areas from 24.5% to 97.2%. The middle area is 82.1%. Swiss Valley & Llangennech is 91.4%.
91.4%8th highest

Is Swiss Valley & Llangennech safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Swiss Valley & Llangennech at a rate of 40.9 per 1,000 people.

That compares with 86.7 per 1,000 people across Carmarthenshire.

Across Wales as a whole, the recorded crime rate was 96.7 per 1,000 people.

In August 2026 alone, 27 cases of crime and anti-social behaviour were recorded in Swiss Valley & Llangennech.

In the 12 months to August 2026, the most common types were violence and sexual offences (153), other crime (64) and anti-social behaviour (32).

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.

Figures for the whole of Carmarthenshire

These figures are published for the whole of Carmarthenshire, not for each middle area, so they describe all of Carmarthenshire and not Swiss Valley & Llangennech alone. See Carmarthenshire

Average house price
£195,263
Up 2.7% in a year
HM Land Registry · Aug 2026
Median full-time pay
£37,405
138th lowest paid of 348
ONS earnings survey · 2025
House price to pay
5.2×
Joint 53rd most affordable of 348
Worked out by Open Index
Population estimate
190,037
Down 0.2% in a year
ONS population estimates · 2025
Swiss Valley & Llangennech in brief

The median price paid for a home in Swiss Valley & Llangennech was £205,000 in 2025.

Swiss Valley & Llangennech had 7,653 usual residents at the census.

About 100% of people in Swiss Valley & Llangennech live in a 1 km square that the radon atlas marks as a radon Affected Area.

In Swiss Valley & Llangennech, 91.4% of homes and businesses could get gigabit-capable broadband in January 2026.