St Martins
WardSouth Caerphilly. About 8,492 people (mid-2024 estimate) in 7.0 square kilometres.
Radon Affected Area by ward
Worked out by Open Index · 2022
About 100% of people in St Martins live in a 1 km square that the radon atlas marks as a radon Affected Area.
How St Martins compares
Each dot is a ward. The black line marks the middle one.
Is St Martins safe? What police records show
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in St Martins at a rate of 135.6 per 1,000 people.
That compares with 107.3 per 1,000 people across Caerphilly.
Across Wales as a whole, the recorded crime rate was 96.7 per 1,000 people.
In August 2026 alone, 95 cases of crime and anti-social behaviour were recorded in St Martins.
In the 12 months to August 2026, the most common types were violence and sexual offences (375), anti-social behaviour (209) and other crime (205).
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 Caerphilly
These figures are published for the whole of Caerphilly, not for each ward, so they describe all of Caerphilly and not St Martins alone. See Caerphilly
St Martins in brief
St Martins had 8,491 usual residents at the census.
About 100% of people in St Martins live in a 1 km square that the radon atlas marks as a radon Affected Area.
In St Martins, 92.6% of homes and businesses could get gigabit-capable broadband in January 2026.
In St Martins, 2.2% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026.