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St Mary's

Ward

East Isles of Scilly. About 1,834 people (mid-2024 estimate) in 6.6 square kilometres.

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Radon Affected Area by ward

Worked out by Open Index · 2022

Under 1%90% or more

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

Population
1,593
86th 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
58.7%
UK 87.8%
Ofcom · Jan 2026
Claimant rate
1.4%
UK 3.9%
ONS via Nomis · Aug 2026

How St Mary's compares

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

St Mary'sMiddle
Population4 wards, Isles of Scilly · 2021
Population: every ward in Isles of Scilly4 areas from 136 to 1,593. The middle area is 163. St Mary's is 1,593.
1,593most populated
People in radon Affected Area squares4 wards, Isles of Scilly · 2022
People in radon Affected Area squares: every ward in Isles of Scilly4 areas from 100.0% to 100.0%. The middle area is 100.0%. St Mary's is 100.0%.
100%
Gigabit broadband coverage4 wards, Isles of Scilly · Jan 2026
Gigabit broadband coverage: every ward in Isles of Scilly4 areas from 0.0% to 58.7%. The middle area is 33.6%. St Mary's is 58.7%.
58.7%highest

Is St Mary's safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in St Mary's at a rate of 39.3 per 1,000 people.

That compares with 40.5 per 1,000 people across Isles of Scilly.

Across England as a whole, the recorded crime rate was 96.3 per 1,000 people.

In August 2026 alone, 19 cases of crime and anti-social behaviour were recorded in St Mary's.

In the 12 months to August 2026, the most common types were violence and sexual offences (49), other crime (22) and burglary (6).

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 Isles of Scilly

These figures are published for the whole of Isles of Scilly, not for each ward, so they describe all of Isles of Scilly and not St Mary's alone. See Isles of Scilly

Deprivation score
12.7
Joint 57th least deprived of 296
MHCLG · England only
Population estimate
2,299
Down 3.5% in a year
ONS population estimates · 2025
Median sale price
£545,000
Joint 23rd most expensive of 318
Worked out by Open Index
Full-fibre broadband coverage
50.2%
UK 81.0%
Ofcom · Jan 2026
St Mary's in brief

St Mary's had 1,593 usual residents at the census.

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

In St Mary's, 58.7% of homes and businesses could get gigabit-capable broadband in January 2026.

In St Mary's, 1.4% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026.