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Castle Demesne

Ward

West Mid and East Antrim. About 4,368 people (mid-2024 estimate) in 1.6 square kilometres.

Open in map

Radon Affected Area by ward

Worked out by Open Index · 2022

Under 1%90% or more

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

Population
4,275
2,143rd 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
91.1%
UK 87.8%
Ofcom · Jan 2026
Aged 15 to 64
69.0%
Joint 849th highest of 8,397
ONS Census 2021 · 2021

How Castle Demesne compares

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

Castle DemesneMiddle
Population40 wards, Mid and East Antrim · 2021
Population: every ward in Mid and East Antrim40 areas from 2,354 to 4,689. The middle area is 3,407. Castle Demesne is 4,275.
4,2754th most populated
People in radon Affected Area squares40 wards, Mid and East Antrim · 2022
People in radon Affected Area squares: every ward in Mid and East Antrim40 areas from 0.0% to 100.0%. The middle area is 3.0%. Castle Demesne is 0.0%.
0%joint fewest people in radon Affected Areas
Gigabit broadband coverage40 wards, Mid and East Antrim · Jan 2026
Gigabit broadband coverage: every ward in Mid and East Antrim40 areas from 81.5% to 99.9%. The middle area is 96.6%. Castle Demesne is 91.1%.
91.1%5th lowest
Aged 15 to 6440 wards, Mid and East Antrim · 2021
Aged 15 to 64: every ward in Mid and East Antrim40 areas from 53.0% to 69.1%. The middle area is 62.4%. Castle Demesne is 69.0%.
69.0%2nd highest

Is Castle Demesne safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Castle Demesne at a rate of 217.9 per 1,000 people.

That compares with 58.7 per 1,000 people across Mid and East Antrim.

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

In August 2026 alone, 100 cases of crime and anti-social behaviour were recorded in Castle Demesne.

In the 12 months to August 2026, the most common types were anti-social behaviour (299), violence and sexual offences (286) and criminal damage and arson (100).

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 Mid and East Antrim

These figures are published for the whole of Mid and East Antrim, not for each ward, so they describe all of Mid and East Antrim and not Castle Demesne alone. See Mid and East Antrim

Average house price
£177,450
Up 8.2% in a year
HM Land Registry · Aug 2026
Population estimate
139,964
No change in a year
ONS population estimates · 2025
Female life expectancy
83.1years
UK 83.0 years
ONS life expectancy · 2022 to 2024
Full-fibre broadband coverage
95.2%
UK 81.0%
Ofcom · Jan 2026
Castle Demesne in brief

Castle Demesne had 4,275 usual residents at the census.

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

In Castle Demesne, 91.1% of homes and businesses could get gigabit-capable broadband in January 2026.

69.0% of residents in Castle Demesne were aged 15 to 64 at the census.