LL55
Postcode districtPostcode district covering Caernarfon and Llanberis, 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 LL55 postcode. How census figures are added up
Gigabit coverage by postcode district
Connected Nations (Ofcom) · January 2026
In LL55, 77.8% of homes and businesses could get gigabit-capable broadband in January 2026.
How LL55 compares
Each dot is a postcode district. The black line marks the middle one.
Is LL55 safe? What police records show
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in LL55 at a rate of 101.9 per 1,000 people.
That compares with 97.5 per 1,000 people across LL.
In August 2026 alone, 250 cases of crime and anti-social behaviour were recorded in LL55.
In the 12 months to August 2026, the most common types were violence and sexual offences (874), anti-social behaviour (453) and other crime (343).
A year earlier, the recorded crime rate in LL55 was 105.2 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 LL55, neighbourhood by neighbourhood
- Deprivation is ranked by neighbourhood, so LL55 has no single figure. Of its 13 neighbourhoods with a rank:
- Decile 1 (Wales’s most deprived 10%): 1 neighbourhood
- Decile 3: 2 neighbourhoods
- Decile 4: 1 neighbourhood
- Decile 5: 1 neighbourhood
- Decile 6: 2 neighbourhoods
- Decile 7: 3 neighbourhoods
- Decile 8: 1 neighbourhood
- Decile 9: 2 neighbourhoods
Welsh Index of Multiple Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in Wales.
Neighbourhoods in LL55
| Name | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
|---|---|---|---|---|
| Gwynedd 004A | 1,090 | 46.6 per 1,000 | 8 | 98.4% |
| Gwynedd 004B | 1,179 | 25.4 per 1,000 | 6 | 83.0% |
| Gwynedd 004C | 1,825 | 48.5 per 1,000 | 9 | 95.9% |
| Gwynedd 005A | 1,897 | 54.3 per 1,000 | 3 | 36.7% |
| Gwynedd 005B | 2,009 | 86.5 per 1,000 | 7 | 56.0% |
| Gwynedd 005C | 1,670 | 27.1 per 1,000 | 6 | 50.7% |
| Gwynedd 006A | 2,114 | 181.6 per 1,000 | 3 | 93.5% |
| Gwynedd 006B | 2,256 | 135.3 per 1,000 | 9 | 89.6% |
| Gwynedd 006C | 2,548 | 146.1 per 1,000 | 1 | 98.6% |
| Gwynedd 006D | 1,597 | 48.0 per 1,000 | 7 | 96.7% |
| Gwynedd 007A | 1,003 | 20.9 per 1,000 | 7 | 86.7% |
| Gwynedd 007C | 1,564 | 299.9 per 1,000 | 4 | 88.8% |
| Gwynedd 007D | 1,710 | 48.8 per 1,000 | 5 | 42.1% |
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 LL554
Postcode sectors in LL555
Council1
Towns in LL551
Postcode districts next to LL558
More in the LL postcode area2
LL55 in brief
LL55 is a postcode district covering Caernarfon and Llanberis, in Gwynedd.
About 22,040 people lived in LL55 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £205,000 in 2025 across 267 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 101.9 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in LL55 was £205,000 in 2025.
LL55 had 21,746 usual residents at the census.
In LL55, 77.8% of homes and businesses could get gigabit-capable broadband in January 2026.
In LL55, 3.2% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026.