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Gelli-deg & Town

Middle area

West Merthyr Tydfil. 6,945 people (mid-2024 estimate) in 3.2 square kilometres.

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Radon Affected Area by middle area

Worked out by Open Index · 2022

Under 1%90% or more

About 62% of people in Gelli-deg & Town live in a 1 km square that the radon atlas marks as a radon Affected Area.

Median sale price
£150,000
Joint 501st cheapest of 7,259
Worked out by Open Index
Population
6,737
Joint 3,859th least populated of 9,448
ONS Census 2021 · 2021
People in radon Affected Area squares
62%
UK 44%
Worked out by Open Index
Gigabit broadband coverage
74.0%
UK 87.8%
Ofcom · Jan 2026

Recorded crime in Gelli-deg & Town

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Gelli-deg & Town at a rate of 312.0 per 1,000 people.

That compares with 110.6 per 1,000 people across Merthyr Tydfil.

Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.

Recorded by police, 12 months to August 2026
Kind of crimeRecorded
Violence and sexual offences700
Shoplifting412
Other crime369
Anti-social behaviour343
Criminal damage and arson159
Drug offences82
Burglary35
Vehicle crime33
Robbery18
Theft from the person16

Source: police.uk, 12 months to August 2026

How Gelli-deg & Town compares

Each dot is a middle area. The black line marks the middle one.

Gelli-deg & TownMiddle
Median sale price7 middle areas, Merthyr Tydfil · 2025
Median sale price: every middle area in Merthyr Tydfil7 areas from £122,750 to £175,000. The middle area is £147,500. Gelli-deg & Town is £150,000.
£150,0003rd most expensive
Population7 middle areas, Merthyr Tydfil · 2021
Population: every middle area in Merthyr Tydfil7 areas from 6,737 to 9,358. The middle area is 8,331. Gelli-deg & Town is 6,737.
6,737least populated
People in radon Affected Area squares7 middle areas, Merthyr Tydfil · 2022
People in radon Affected Area squares: every middle area in Merthyr Tydfil7 areas from 7.0% to 96.0%. The middle area is 62.0%. Gelli-deg & Town is 62.0%.
62%4th most people in radon Affected Areas
Gigabit broadband coverage7 middle areas, Merthyr Tydfil · Jan 2026
Gigabit broadband coverage: every middle area in Merthyr Tydfil7 areas from 50.9% to 93.2%. The middle area is 83.1%. Gelli-deg & Town is 74.0%.
74.0%3rd lowest

Is Gelli-deg & Town safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Gelli-deg & Town at a rate of 312.0 per 1,000 people.

That compares with 110.6 per 1,000 people across Merthyr Tydfil.

Across Wales as a whole, the recorded crime rate was 96.7 per 1,000 people.

In August 2026 alone, 208 cases of crime and anti-social behaviour were recorded in Gelli-deg & Town.

In the 12 months to August 2026, the most common types were violence and sexual offences (700), shoplifting (412) and other crime (369).

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 Merthyr Tydfil

These figures are published for the whole of Merthyr Tydfil, not for each middle area, so they describe all of Merthyr Tydfil and not Gelli-deg & Town alone. See Merthyr Tydfil

Average house price
£148,656
Down 1.0% in a year
HM Land Registry · Aug 2026
Median full-time pay
£35,152
67th lowest paid of 348
ONS earnings survey · 2025
House price to pay
4.2×
Joint 15th most affordable of 348
Worked out by Open Index
Population estimate
58,362
Down 0.6% in a year
ONS population estimates · 2025
Gelli-deg & Town in brief

The median price paid for a home in Gelli-deg & Town was £150,000 in 2025.

Gelli-deg & Town had 6,737 usual residents at the census.

About 62% of people in Gelli-deg & Town live in a 1 km square that the radon atlas marks as a radon Affected Area.

In Gelli-deg & Town, 74.0% of homes and businesses could get gigabit-capable broadband in January 2026.