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Sidcup

Ward

South west Bexley. About 15,928 people (mid-2024 estimate) in 4.0 square kilometres.

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Radon Affected Area by ward

Worked out by Open Index · 2022

Under 1%90% or more

About 30% of people in Sidcup live in a 1 km square that the radon atlas marks as a radon Affected Area.

Population
15,422
721st most populated of 8,397
ONS Census 2021 · 2021
People in radon Affected Area squares
30%
UK 44%
Worked out by Open Index
Gigabit broadband coverage
89.3%
UK 87.8%
Ofcom · Jan 2026
Claimant rate
3.0%
UK 3.9%
ONS via Nomis · Aug 2026

How Sidcup compares

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

SidcupMiddle
Population17 wards, Bexley · 2021
Population: every ward in Bexley17 areas from 10,082 to 17,692. The middle area is 15,617. Sidcup is 15,422.
15,4228th least populated
People in radon Affected Area squares17 wards, Bexley · 2022
People in radon Affected Area squares: every ward in Bexley17 areas from 0.0% to 100.0%. The middle area is 30.0%. Sidcup is 30.0%.
30%joint 8th fewest people in radon Affected Areas
Gigabit broadband coverage17 wards, Bexley · Jan 2026
Gigabit broadband coverage: every ward in Bexley17 areas from 83.7% to 98.7%. The middle area is 95.5%. Sidcup is 89.3%.
89.3%6th lowest
Claimant rate17 wards, Bexley · Aug 2026
Claimant rate: every ward in Bexley17 areas from 1.8% to 5.9%. The middle area is 3.0%. Sidcup is 3.0%.
3.0%9th highest

Is Sidcup safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Sidcup at a rate of 78.1 per 1,000 people.

That compares with 78.1 per 1,000 people across Bexley.

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

In August 2026 alone, 93 cases of crime and anti-social behaviour were recorded in Sidcup.

In the 12 months to August 2026, the most common types were violence and sexual offences (357), anti-social behaviour (284) and other crime (185).

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 Bexley

These figures are published for the whole of Bexley, not for each ward, so they describe all of Bexley and not Sidcup alone. See Bexley

Average house price
£413,343
Up 2.0% in a year
HM Land Registry · Jul 2026
Median full-time pay
£43,969
65th highest paid of 348
ONS earnings survey · 2025
House price to pay
9.4×
Joint 71st least affordable of 348
Worked out by Open Index
Deprivation score
15.3
Joint 102nd least deprived of 296
MHCLG · England only
Sidcup in brief

Sidcup had 15,422 usual residents at the census.

About 30% of people in Sidcup live in a 1 km square that the radon atlas marks as a radon Affected Area.

In Sidcup, 89.3% of homes and businesses could get gigabit-capable broadband in January 2026.

In Sidcup, 3.0% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026.