Llanberis & Deiniolen
Middle areaNorth Gwynedd. 6,714 people (mid-2024 estimate) in 94 square kilometres.
Radon Affected Area by middle area
Worked out by Open Index · 2022
About 67% of people in Llanberis & Deiniolen live in a 1 km square that the radon atlas marks as a radon Affected Area.
Recorded crime in Llanberis & Deiniolen
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Llanberis & Deiniolen at a rate of 57.5 per 1,000 people.
That compares with 88.8 per 1,000 people across Gwynedd.
Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.
| Kind of crime | Recorded |
|---|---|
| Violence and sexual offences | 162 |
| Other crime | 85 |
| Anti-social behaviour | 71 |
| Criminal damage and arson | 30 |
| Burglary | 17 |
| Shoplifting | 11 |
| Drug offences | 5 |
| Vehicle crime | 5 |
| Robbery | 0 |
| Theft from the person | 0 |
Source: police.uk, 12 months to August 2026
How Llanberis & Deiniolen compares
Each dot is a middle area. The black line marks the middle one.
Is Llanberis & Deiniolen safe? What police records show
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Llanberis & Deiniolen at a rate of 57.5 per 1,000 people.
That compares with 88.8 per 1,000 people across Gwynedd.
Across Wales as a whole, the recorded crime rate was 96.7 per 1,000 people.
In August 2026 alone, 48 cases of crime and anti-social behaviour were recorded in Llanberis & Deiniolen.
In the 12 months to August 2026, the most common types were violence and sexual offences (162), other crime (85) and anti-social behaviour (71).
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 Gwynedd
These figures are published for the whole of Gwynedd, not for each middle area, so they describe all of Gwynedd and not Llanberis & Deiniolen alone. See Gwynedd
Llanberis & Deiniolen in brief
The median price paid for a home in Llanberis & Deiniolen was £199,950 in 2025.
Llanberis & Deiniolen had 6,742 usual residents at the census.
About 67% of people in Llanberis & Deiniolen live in a 1 km square that the radon atlas marks as a radon Affected Area.
In Llanberis & Deiniolen, 54.2% of homes and businesses could get gigabit-capable broadband in January 2026.