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Castlerock

Ward

North west Causeway Coast and Glens. About 3,080 people (mid-2024 estimate) in 18 square kilometres.

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Radon Affected Area by ward

Worked out by Open Index · 2022

Under 1%90% or more

About 0% of people in Castlerock live in a 1 km square that the radon atlas marks as a radon Affected Area.

Population
2,951
1,066th least populated of 8,397
ONS Census 2021 · 2021
People in radon Affected Area squares
0%
UK 44%
Worked out by Open Index
Gigabit broadband coverage
99.0%
UK 87.8%
Ofcom · Jan 2026
Aged 15 to 64
58.7%
Joint 1,811th lowest of 8,397
ONS Census 2021 · 2021

How Castlerock compares

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

CastlerockMiddle
Population40 wards, Causeway Coast and Glens · 2021
Population: every ward in Causeway Coast and Glens40 areas from 2,334 to 4,890. The middle area is 3,427. Castlerock is 2,951.
2,9518th least populated
People in radon Affected Area squares40 wards, Causeway Coast and Glens · 2022
People in radon Affected Area squares: every ward in Causeway Coast and Glens40 areas from 0.0% to 100.0%. The middle area is 0.0%. Castlerock is 0.0%.
0%joint fewest people in radon Affected Areas
Gigabit broadband coverage40 wards, Causeway Coast and Glens · Jan 2026
Gigabit broadband coverage: every ward in Causeway Coast and Glens40 areas from 71.0% to 99.9%. The middle area is 95.3%. Castlerock is 99.0%.
99.0%joint 8th highest
Aged 15 to 6440 wards, Causeway Coast and Glens · 2021
Aged 15 to 64: every ward in Causeway Coast and Glens40 areas from 54.8% to 66.8%. The middle area is 62.8%. Castlerock is 58.7%.
58.7%joint 4th lowest

Is Castlerock safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Castlerock at a rate of 40.3 per 1,000 people.

That compares with 57.5 per 1,000 people across Causeway Coast and Glens.

Across Northern Ireland as a whole, the recorded crime rate was 70.2 per 1,000 people.

In August 2026 alone, 15 cases of crime and anti-social behaviour were recorded in Castlerock.

In the 12 months to August 2026, the most common types were anti-social behaviour (49), violence and sexual offences (42) and criminal damage and arson (12).

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 Causeway Coast and Glens

These figures are published for the whole of Causeway Coast and Glens, not for each ward, so they describe all of Causeway Coast and Glens and not Castlerock alone. See Causeway Coast and Glens

Average house price
£218,871
Up 9.6% in a year
HM Land Registry · Aug 2026
Population estimate
141,752
Down 0.1% in a year
ONS population estimates · 2025
Female life expectancy
83.2years
UK 83.0 years
ONS life expectancy · 2022 to 2024
Full-fibre broadband coverage
93.6%
UK 81.0%
Ofcom · Jan 2026
Castlerock in brief

Castlerock had 2,951 usual residents at the census.

About 0% of people in Castlerock live in a 1 km square that the radon atlas marks as a radon Affected Area.

In Castlerock, 99.0% of homes and businesses could get gigabit-capable broadband in January 2026.

58.7% of residents in Castlerock were aged 15 to 64 at the census.