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Swanley St Mary's

Ward

North Sevenoaks. About 5,091 people (mid-2024 estimate) in 1.1 square kilometres.

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Radon Affected Area by ward

Worked out by Open Index · 2022

Under 1%90% or more

About 34% of people in Swanley St Mary's live in a 1 km square that the radon atlas marks as a radon Affected Area.

Population
4,853
2,616th least populated of 8,397
ONS Census 2021 · 2021
People in radon Affected Area squares
34%
UK 44%
Worked out by Open Index
Gigabit broadband coverage
93.1%
UK 87.8%
Ofcom · Jan 2026
Claimant rate
3.6%
UK 3.9%
ONS via Nomis · Aug 2026

How Swanley St Mary's compares

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

Swanley St Mary'sMiddle
Population26 wards, Sevenoaks · 2021
Population: every ward in Sevenoaks26 areas from 1,864 to 7,039. The middle area is 4,656. Swanley St Mary's is 4,853.
4,85312th most populated
People in radon Affected Area squares26 wards, Sevenoaks · 2022
People in radon Affected Area squares: every ward in Sevenoaks26 areas from 0.0% to 100.0%. The middle area is 97.0%. Swanley St Mary's is 34.0%.
34%6th fewest people in radon Affected Areas
Gigabit broadband coverage26 wards, Sevenoaks · Jan 2026
Gigabit broadband coverage: every ward in Sevenoaks26 areas from 12.0% to 96.7%. The middle area is 85.0%. Swanley St Mary's is 93.1%.
93.1%3rd highest
Claimant rate26 wards, Sevenoaks · Aug 2026
Claimant rate: every ward in Sevenoaks26 areas from 1.0% to 4.2%. The middle area is 2.0%. Swanley St Mary's is 3.6%.
3.6%3rd highest

Is Swanley St Mary's safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Swanley St Mary's at a rate of 141.2 per 1,000 people.

That compares with 62.5 per 1,000 people across Sevenoaks.

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

In August 2026 alone, 72 cases of crime and anti-social behaviour were recorded in Swanley St Mary's.

In the 12 months to August 2026, the most common types were violence and sexual offences (226), anti-social behaviour (165) and shoplifting (106).

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 Sevenoaks

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

Average house price
£535,810
Up 0.4% in a year
HM Land Registry · Aug 2026
Median full-time pay
£44,581
55th highest paid of 348
ONS earnings survey · 2025
House price to pay
12.0×
23rd least affordable of 348
Worked out by Open Index
Deprivation score
14.4
Joint 86th least deprived of 296
MHCLG · England only
Swanley St Mary's in brief

Swanley St Mary's had 4,853 usual residents at the census.

About 34% of people in Swanley St Mary's live in a 1 km square that the radon atlas marks as a radon Affected Area.

In Swanley St Mary's, 93.1% of homes and businesses could get gigabit-capable broadband in January 2026.

In Swanley St Mary's, 3.6% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026.