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SA20

Postcode district

Postcode district covering Llandovery, Cilycwm and Cynghordy, in Carmarthenshire.

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 SA20 postcode. How census figures are added up

Open in map

Radon Affected Area by postcode district

Worked out by Open Index · 2022

Under 1%90% or more

About 93% of people in SA20 live in a 1 km square that the radon atlas marks as a radon Affected Area.

Median sale price
£242,500
Joint 692nd cheapest of 2,235
Worked out by Open Index
Population
3,399
362nd least populated of 2,756
ONS Census 2021 · 2021
People in radon Affected Area squares
93%
UK 44%
Worked out by Open Index
Gigabit broadband coverage
68.2%
UK 87.8%
Ofcom · Jan 2026

How SA20 compares

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

SA20Middle
Median sale price49 postcode districts, SA · 2025
Median sale price: every postcode district in SA49 areas from £140,000 to £440,000. The middle area is £225,000. SA20 is £242,500.
£242,50018th most expensive
Population52 postcode districts, SA · 2021
Population: every postcode district in SA52 areas from 256 to 51,694. The middle area is 10,195. SA20 is 3,399.
3,39916th least populated
People in radon Affected Area squares52 postcode districts, SA · 2022
People in radon Affected Area squares: every postcode district in SA52 areas from 0.0% to 100.0%. The middle area is 100.0%. SA20 is 93.0%.
93%joint 15th fewest people in radon Affected Areas
Gigabit broadband coverage52 postcode districts, SA · Jan 2026
Gigabit broadband coverage: every postcode district in SA52 areas from 13.7% to 98.5%. The middle area is 75.2%. SA20 is 68.2%.
68.2%23rd lowest

Is SA20 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in SA20 at a rate of 49.7 per 1,000 people.

That compares with 86.6 per 1,000 people across the SA postcode area.

In August 2026 alone, 22 cases of crime and anti-social behaviour were recorded in SA20.

In the 12 months to August 2026, the most common types were violence and sexual offences (69), other crime (31) and criminal damage and arson (28).

A year earlier, the recorded crime rate in SA20 was 38.4 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 SA20, neighbourhood by neighbourhood

  • Deprivation is ranked by neighbourhood, so SA20 has no single figure. Of its 2 neighbourhoods with a rank:
  • Decile 4: 1 neighbourhood
  • Decile 6: 1 neighbourhood

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

Neighbourhoods in SA20

NamePeople (census)Recorded crime per 1,000Deprivation decileGigabit broadband
Carmarthenshire 002C1,36354.0 per 1,000465.7%
Carmarthenshire 002D1,23262.1 per 1,000685.5%

Your MP

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

Postcode sectors in SA201

Council1

Postcode districts next to SA205

Nearest rail stations2

More in the SA postcode area2

SA20 in brief

SA20 is a postcode district covering Llandovery, Cilycwm and Cynghordy, in Carmarthenshire.

About 3,461 people lived in SA20 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £242,500 in 2025 across 45 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 49.7 per 1,000 people in the 12 months to August 2026 (police.uk).

The median price paid for a home in SA20 was £242,500 in 2025.

SA20 had 3,399 usual residents at the census.

About 93% of people in SA20 live in a 1 km square that the radon atlas marks as a radon Affected Area.

In SA20, 68.2% of homes and businesses could get gigabit-capable broadband in January 2026.