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St Mary's

Ward

North west Windsor and Maidenhead. About 8,395 people (mid-2024 estimate) in 1.4 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
7,526
Joint 3,683rd most 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
76.2%
UK 87.8%
Ofcom · Jan 2026
Claimant rate
4.5%
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
Population19 wards, Windsor and Maidenhead · 2021
Population: every ward in Windsor and Maidenhead19 areas from 6,558 to 12,881. The middle area is 7,526. St Mary's is 7,526.
7,52610th most populated
People in radon Affected Area squares19 wards, Windsor and Maidenhead · 2022
People in radon Affected Area squares: every ward in Windsor and Maidenhead19 areas from 0.0% to 100.0%. The middle area is 84.0%. St Mary's is 100.0%.
100%joint most people in radon Affected Areas
Gigabit broadband coverage19 wards, Windsor and Maidenhead · Jan 2026
Gigabit broadband coverage: every ward in Windsor and Maidenhead19 areas from 61.8% to 98.5%. The middle area is 91.5%. St Mary's is 76.2%.
76.2%5th lowest
Claimant rate19 wards, Windsor and Maidenhead · Aug 2026
Claimant rate: every ward in Windsor and Maidenhead19 areas from 1.4% to 4.5%. The middle area is 2.3%. St Mary's is 4.5%.
4.5%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 180.5 per 1,000 people.

That compares with 64.8 per 1,000 people across Windsor and Maidenhead.

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

In August 2026 alone, 114 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 (494), other crime (344) and shoplifting (181).

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 Windsor and Maidenhead

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

Average house price
£583,688
Down 0.2% in a year
HM Land Registry · Aug 2026
Median full-time pay
£47,387
27th highest paid of 348
ONS earnings survey · 2025
House price to pay
12.3×
Joint 20th least affordable of 348
Worked out by Open Index
Deprivation score
8.9
12th least deprived of 296
MHCLG · England only
St Mary's in brief

St Mary's had 7,526 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, 76.2% of homes and businesses could get gigabit-capable broadband in January 2026.

In St Mary's, 4.5% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026.