LL23
Postcode districtPostcode district covering Y Bala and Llandderfel, in Gwynedd.
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 LL23 postcode. How census figures are added up
Radon Affected Area by postcode district
Worked out by Open Index · 2022
About 100% of people in LL23 live in a 1 km square that the radon atlas marks as a radon Affected Area.
How LL23 compares
Each dot is a postcode district. The black line marks the middle one.
Is LL23 safe? What police records show
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in LL23 at a rate of 55.7 per 1,000 people.
That compares with 97.5 per 1,000 people across the LL postcode area.
In August 2026 alone, 32 cases of crime and anti-social behaviour were recorded in LL23.
In the 12 months to August 2026, the most common types were violence and sexual offences (105), anti-social behaviour (59) and other crime (40).
A year earlier, the recorded crime rate in LL23 was 55.2 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 LL23, neighbourhood by neighbourhood
- Deprivation is ranked by neighbourhood, so LL23 has no single figure. Of its 3 neighbourhoods with a rank:
- Decile 4: 1 neighbourhood
- Decile 6: 1 neighbourhood
- Decile 7: 1 neighbourhood
Welsh Index of Multiple Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in Wales.
Neighbourhoods in LL23
| Name | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
|---|---|---|---|---|
| Gwynedd 015A | 1,992 | 71.4 per 1,000 | 7 | 84.3% |
| Gwynedd 015C | 1,089 | 32.2 per 1,000 | 4 | 78.4% |
| Gwynedd 015D | 1,346 | 52.6 per 1,000 | 6 | 77.6% |
Your MP
- Liz Saville RobertsPlaid CymruMP for Dwyfor Meirionnydd
As of , from the UK Parliament Members API. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.
Middle areas in LL231
Postcode sectors in LL231
Council1
Postcode districts next to LL236
More in the LL postcode area2
LL23 in brief
LL23 is a postcode district covering Y Bala and Llandderfel, in Gwynedd.
About 4,472 people lived in LL23 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £152,750 in 2025 across 40 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 55.7 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in LL23 was £152,750 in 2025.
LL23 had 4,426 usual residents at the census.
About 100% of people in LL23 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In LL23, 81.0% of homes and businesses could get gigabit-capable broadband in January 2026.