Pentwyn
Middle areaNorth east Cardiff. 7,732 people (mid-2024 estimate) in 2.1 square kilometres.
Radon Affected Area by middle area
Worked out by Open Index · 2022
About 100% of people in Pentwyn live in a 1 km square that the radon atlas marks as a radon Affected Area.
Recorded crime in Pentwyn
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Pentwyn at a rate of 74.9 per 1,000 people.
That compares with 112.2 per 1,000 people across Cardiff.
Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.
| Kind of crime | Recorded |
|---|---|
| Violence and sexual offences | 231 |
| Other crime | 100 |
| Shoplifting | 65 |
| Criminal damage and arson | 54 |
| Anti-social behaviour | 39 |
| Vehicle crime | 39 |
| Burglary | 28 |
| Drug offences | 14 |
| Robbery | 6 |
| Theft from the person | 3 |
Source: police.uk, 12 months to August 2026
How Pentwyn compares
Each dot is a middle area. The black line marks the middle one.
Is Pentwyn safe? What police records show
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Pentwyn at a rate of 74.9 per 1,000 people.
That compares with 112.2 per 1,000 people across Cardiff.
Across Wales as a whole, the recorded crime rate was 96.7 per 1,000 people.
In August 2026 alone, 62 cases of crime and anti-social behaviour were recorded in Pentwyn.
In the 12 months to August 2026, the most common types were violence and sexual offences (231), other crime (100) and shoplifting (65).
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 Cardiff
These figures are published for the whole of Cardiff, not for each middle area, so they describe all of Cardiff and not Pentwyn alone. See Cardiff
Pentwyn in brief
The median price paid for a home in Pentwyn was £203,000 in 2025.
Pentwyn had 7,315 usual residents at the census.
About 100% of people in Pentwyn live in a 1 km square that the radon atlas marks as a radon Affected Area.
In Pentwyn, 94.5% of homes and businesses could get gigabit-capable broadband in January 2026.