Sydenham
WardSouth west Lewisham. About 16,917 people in 1.8 square kilometres.
Radon Affected Area by ward
Worked out by Open Index · 2022
About 0% of people in Sydenham live in a 1 km square that the radon atlas marks as a radon Affected Area.
How Sydenham compares
Each dot is a ward. The black line marks the middle one.
Is Sydenham safe? What police records show
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Sydenham at a rate of 118.8 per 1,000 people.
That compares with 122.7 per 1,000 people across Lewisham.
Across England as a whole, the recorded crime rate was 96.3 per 1,000 people.
In August 2026 alone, 223 cases of crime and anti-social behaviour were recorded in Sydenham.
In the 12 months to August 2026, the most common types were violence and sexual offences (581), anti-social behaviour (460) and other crime (309).
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 Lewisham
These figures are published for the whole of Lewisham, not for each ward, so they describe all of Lewisham and not Sydenham alone. See Lewisham
Sydenham in brief
Sydenham had 16,969 usual residents at the census.
About 0% of people in Sydenham live in a 1 km square that the radon atlas marks as a radon Affected Area.
In Sydenham, 92.3% of homes and businesses could get gigabit-capable broadband in January 2026.
In Sydenham, 7.5% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026.