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St Mark's & Seething Wells

Ward

North west Kingston upon Thames. About 12,298 people (mid-2024 estimate) in 1.8 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 St Mark's & Seething Wells live in a 1 km square that the radon atlas marks as a radon Affected Area.

Population
11,804
1,674th most 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
85.0%
UK 87.8%
Ofcom · Jan 2026
Claimant rate
3.2%
UK 3.9%
ONS via Nomis · Aug 2026

How St Mark's & Seething Wells compares

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

St Mark's & Seething WellsMiddle
Population19 wards, Kingston upon Thames · 2021
Population: every ward in Kingston upon Thames19 areas from 5,607 to 11,804. The middle area is 9,484. St Mark's & Seething Wells is 11,804.
11,804most populated
People in radon Affected Area squares19 wards, Kingston upon Thames · 2022
People in radon Affected Area squares: every ward in Kingston upon Thames19 areas from 0.0% to 0.0%. The middle area is 0.0%. St Mark's & Seething Wells is 0.0%.
0%
Gigabit broadband coverage19 wards, Kingston upon Thames · Jan 2026
Gigabit broadband coverage: every ward in Kingston upon Thames19 areas from 80.1% to 99.1%. The middle area is 93.4%. St Mark's & Seething Wells is 85.0%.
85.0%3rd lowest
Claimant rate19 wards, Kingston upon Thames · Aug 2026
Claimant rate: every ward in Kingston upon Thames19 areas from 1.5% to 4.8%. The middle area is 3.1%. St Mark's & Seething Wells is 3.2%.
3.2%8th highest

Is St Mark's & Seething Wells safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in St Mark's & Seething Wells at a rate of 87.4 per 1,000 people.

That compares with 87.4 per 1,000 people across Kingston upon Thames.

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

In August 2026 alone, 67 cases of crime and anti-social behaviour were recorded in St Mark's & Seething Wells.

In the 12 months to August 2026, the most common types were anti-social behaviour (271), violence and sexual offences (249) and shoplifting (211).

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 Kingston upon Thames

These figures are published for the whole of Kingston upon Thames, not for each ward, so they describe all of Kingston upon Thames and not St Mark's & Seething Wells alone. See Kingston upon Thames

Average house price
£597,587
Up 4.9% in a year
HM Land Registry · Aug 2026
Median full-time pay
£46,871
32nd highest paid of 348
ONS earnings survey · 2025
House price to pay
12.7×
Joint 14th least affordable of 348
Worked out by Open Index
Deprivation score
11.1
37th least deprived of 296
MHCLG · England only
St Mark's & Seething Wells in brief

St Mark's & Seething Wells had 11,804 usual residents at the census.

About 0% of people in St Mark's & Seething Wells live in a 1 km square that the radon atlas marks as a radon Affected Area.

In St Mark's & Seething Wells, 85.0% of homes and businesses could get gigabit-capable broadband in January 2026.

In St Mark's & Seething Wells, 3.2% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026.