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Castle

Ward

North Ards and North Down. About 3,992 people (mid-2024 estimate) in 1.7 square kilometres.

Open in map

Radon Affected Area by ward

Worked out by Open Index · 2022

Under 1%90% or more

About 100% of people in Castle live in a 1 km square that the radon atlas marks as a radon Affected Area.

Population
3,424
1,473rd least populated of 8,397
ONS Census 2021 · 2021
People in radon Affected Area squares
100%
UK 44%
Worked out by Open Index
Gigabit broadband coverage
99.2%
UK 87.8%
Ofcom · Jan 2026
Aged 15 to 64
60.1%
Joint 2,627th lowest of 8,397
ONS Census 2021 · 2021

How Castle compares

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

CastleMiddle
Population40 wards, Ards and North Down · 2021
Population: every ward in Ards and North Down40 areas from 2,728 to 6,886. The middle area is 4,135. Castle is 3,424.
3,4248th least populated
People in radon Affected Area squares40 wards, Ards and North Down · 2022
People in radon Affected Area squares: every ward in Ards and North Down40 areas from 0.0% to 100.0%. The middle area is 75.5%. Castle is 100.0%.
100%joint most people in radon Affected Areas
Gigabit broadband coverage40 wards, Ards and North Down · Jan 2026
Gigabit broadband coverage: every ward in Ards and North Down40 areas from 87.0% to 100.0%. The middle area is 96.5%. Castle is 99.2%.
99.2%joint 5th highest
Aged 15 to 6440 wards, Ards and North Down · 2021
Aged 15 to 64: every ward in Ards and North Down40 areas from 50.1% to 68.6%. The middle area is 61.0%. Castle is 60.1%.
60.1%17th lowest

Is Castle safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Castle at a rate of 82.5 per 1,000 people.

That compares with 52.1 per 1,000 people across Ards and North Down.

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

In August 2026 alone, 29 cases of crime and anti-social behaviour were recorded in Castle.

In the 12 months to August 2026, the most common types were violence and sexual offences (100), anti-social behaviour (85) and criminal damage and arson (34).

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 Ards and North Down

These figures are published for the whole of Ards and North Down, not for each ward, so they describe all of Ards and North Down and not Castle alone. See Ards and North Down

Average house price
£227,275
Up 7.0% in a year
HM Land Registry · Jul 2026
Population estimate
165,407
No change in a year
ONS population estimates · 2025
Female life expectancy
83.5years
UK 83.0 years
ONS life expectancy · 2022 to 2024
Full-fibre broadband coverage
95.7%
UK 81.0%
Ofcom · Jan 2026
Castle in brief

Castle had 3,424 usual residents at the census.

About 100% of people in Castle live in a 1 km square that the radon atlas marks as a radon Affected Area.

In Castle, 99.2% of homes and businesses could get gigabit-capable broadband in January 2026.

60.1% of residents in Castle were aged 15 to 64 at the census.