CF46
Postcode districtPostcode district covering Nelson, Treharris and Trelewis, in Merthyr Tydfil and Caerphilly.
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 CF46 postcode. How census figures are added up
Radon Affected Area by postcode district
Worked out by Open Index · 2022
About 86% of people in CF46 live in a 1 km square that the radon atlas marks as a radon Affected Area.
How CF46 compares
Each dot is a postcode district. The black line marks the middle one.
Is CF46 safe? What police records show
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in CF46 at a rate of 64.6 per 1,000 people.
That compares with 96.0 per 1,000 people across the CF postcode area.
In August 2026 alone, 97 cases of crime and anti-social behaviour were recorded in CF46.
In the 12 months to August 2026, the most common types were violence and sexual offences (384), other crime (180) and anti-social behaviour (137).
A year earlier, the recorded crime rate in CF46 was 66.9 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 CF46, neighbourhood by neighbourhood
- Deprivation is ranked by neighbourhood, so CF46 has no single figure. Of its 9 neighbourhoods with a rank:
- Decile 3: 1 neighbourhood
- Decile 4: 3 neighbourhoods
- Decile 5: 2 neighbourhoods
- Decile 7: 2 neighbourhoods
- Decile 9: 1 neighbourhood
Welsh Index of Multiple Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in Wales.
Neighbourhoods in CF46
| Name | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
|---|---|---|---|---|
| Caerphilly 013A | 1,449 | 98.4 per 1,000 | 7 | 81.7% |
| Caerphilly 013B | 1,501 | 101.1 per 1,000 | 4 | 44.3% |
| Caerphilly 013C | 1,522 | 28.4 per 1,000 | 7 | 71.8% |
| Merthyr Tydfil 006A | 1,358 | 81.0 per 1,000 | 3 | 60.2% |
| Merthyr Tydfil 007A | 2,410 | 55.0 per 1,000 | 5 | 89.0% |
| Merthyr Tydfil 007B | 1,592 | 37.3 per 1,000 | 9 | 0.7% |
| Merthyr Tydfil 007C | 1,425 | 66.9 per 1,000 | 5 | 0.0% |
| Merthyr Tydfil 007D | 1,622 | 55.4 per 1,000 | 4 | 77.3% |
| Merthyr Tydfil 007E | 1,633 | 69.5 per 1,000 | 4 | 63.4% |
MPs for CF46
- Gerald JonesLabourMP for Merthyr Tydfil and Aberdare72% of CF46’s postcodes
- Chris EvansLabour (Co-op)MP for Caerphilly28% of CF46’s postcodes
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 CF462
Postcode sectors in CF462
Councils CF46 covers2
Postcode districts next to CF467
Nearest rail stations4
More in the CF postcode area2
CF46 in brief
CF46 is a postcode district covering Nelson, Treharris and Trelewis, in Merthyr Tydfil and Caerphilly.
About 14,346 people lived in CF46 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £151,500 in 2025 across 176 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 64.6 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in CF46 was £151,500 in 2025.
CF46 had 14,510 usual residents at the census.
About 86% of people in CF46 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In CF46, 56.5% of homes and businesses could get gigabit-capable broadband in January 2026.