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SL7

Postcode district

Postcode district covering Marlow, in Buckinghamshire.

Approximate outline worked out by Open Index from the ONS Postcode Directory: each census output area belongs to the district that holds most of its postcodes. People, homes, recorded crime and broadband add up those output areas. House sales count every sale with an SL7 postcode. How census figures are added up

Open in map

Gigabit coverage by postcode district

Connected Nations (Ofcom) · January 2026

Under 60%98% or more

In SL7, 83.6% of homes and businesses could get gigabit-capable broadband in January 2026.

Median sale price
£650,000
105th most expensive of 2,235
Worked out by Open Index
Population
21,220
1,370th least populated of 2,756
ONS Census 2021 · 2021
Gigabit broadband coverage
83.6%
UK 87.8%
Ofcom · Jan 2026
Claimant rate
2.0%
UK 3.9%
ONS via Nomis · Aug 2026

How SL7 compares

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

SL7Middle
Median sale price10 postcode districts, SL · 2025
Median sale price: every postcode district in SL10 areas from £395,931 to £867,500. The middle area is £537,375. SL7 is £650,000.
£650,000joint 2nd most expensive
Population12 postcode districts, SL · 2021
Population: every postcode district in SL12 areas from 339 to 83,062. The middle area is 23,418. SL7 is 21,220.
21,2205th least populated
Gigabit broadband coverage12 postcode districts, SL · Jan 2026
Gigabit broadband coverage: every postcode district in SL12 areas from 70.7% to 100.0%. The middle area is 87.8%. SL7 is 83.6%.
83.6%4th lowest
Claimant rate10 postcode districts, SL · Aug 2026
Claimant rate: every postcode district in SL10 areas from 1.8% to 6.3%. The middle area is 2.6%. SL7 is 2.0%.
2.0%joint 3rd lowest

Is SL7 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in SL7 at a rate of 51.7 per 1,000 people.

That compares with 77.9 per 1,000 people across SL.

In August 2026 alone, 91 cases of crime and anti-social behaviour were recorded in SL7.

In the 12 months to August 2026, the most common types were violence and sexual offences (376), other crime (254) and anti-social behaviour (140).

A year earlier, the recorded crime rate in SL7 was 46.5 per 1,000 people.

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.

Deprivation in SL7, neighbourhood by neighbourhood

  • Deprivation is ranked by neighbourhood, so SL7 has no single figure. Of its 13 neighbourhoods with a rank:
  • Decile 6: 1 neighbourhood
  • Decile 7: 2 neighbourhoods
  • Decile 9: 4 neighbourhoods
  • Decile 10 (England’s least deprived 10%): 6 neighbourhoods

English Indices of Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in England.

Neighbourhoods in SL7

NamePeople (census)Recorded crime per 1,000Deprivation decileGigabit broadband
Buckinghamshire 057B1,48425.7 per 1,00096.5%
Buckinghamshire 057C2,04910.7 per 1,0001091.1%
Buckinghamshire 057D1,57654.7 per 1,000965.8%
Buckinghamshire 061A1,31785.0 per 1,000996.8%
Buckinghamshire 061B1,40745.7 per 1,0001083.8%
Buckinghamshire 061C1,70345.5 per 1,000998.0%
Buckinghamshire 061D1,23581.0 per 1,0006100.0%
Buckinghamshire 062A1,47878.0 per 1,000783.7%
Buckinghamshire 062B1,31712.4 per 1,0001096.9%
Buckinghamshire 062C1,43127.6 per 1,0001087.7%
Buckinghamshire 062D1,53419.2 per 1,0001094.8%
Buckinghamshire 062E1,758120.1 per 1,000799.9%
Buckinghamshire 062F1,59374.8 per 1,0001096.7%

MPs for SL7

As of , from the UK Parliament Members API. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.

Middle areas in SL73

Postcode sectors in SL74

Council1

Towns in SL71

Postcode districts next to SL77

Nearest rail stations4

More in the SL postcode area2

SL7 in brief

SL7 is a postcode district covering Marlow, in Buckinghamshire.

About 21,374 people lived in SL7 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £650,000 in 2025 across 296 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 51.7 per 1,000 people in the 12 months to August 2026 (police.uk).

The median price paid for a home in SL7 was £650,000 in 2025.

SL7 had 21,220 usual residents at the census.

In SL7, 83.6% of homes and businesses could get gigabit-capable broadband in January 2026.

In SL7, 2.0% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026.