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SL4 3AZ

Eton & Castle · Windsor and Maidenhead · England

Updated September 2026

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Location overview

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Ward
Eton & Castle
Local authority
Windsor and Maidenhead
Constituency
Windsor
Postcode district
SL4
Postcode sector
SL4 3

Nearby postcodes

Nearby postcode distances
Postcode Distance
SL4 1HA 32 m
SL4 3AS 53 m
SL4 3BX 56 m
SL4 3BY 75 m
SL4 3BP 88 m
Complete postcode fields and official codes
Postcode
SL4 3AZ
Status
Current
Introduced
1 January 1980
Terminated
Not published
Postcode area
SL
Postcode district
SL4
Postcode sector
SL4 3
Latitude
51.478371
Longitude
-0.612960
British National Grid easting
496,420
British National Grid northing
176,402

Statistical and administrative geographies

Country
England · E92000001
Region
South East · E12000008
Local authority district
Windsor and Maidenhead · E06000040
Electoral ward
Eton & Castle · E05012504
Parish or community
E43000259
Westminster constituency
Windsor · E14001588
Output area
E00083523
Lower layer super output area
Windsor and Maidenhead 012A · E01016545
Middle layer super output area
Windsor and Maidenhead 012 · E02003432

Postcode source versions

Explore SL4

Use the wider postcode district to compare the same evidence across more locations.

Schools

Within 3.1 miles of this postcode

View all nearby schools
Open schools
66
Primary
27
Secondary
16

  1. Upton House School

    Other independent school

    316 m

  2. The King's House School, Windsor

    Other independent school

    395 m

  3. Trinity St Stephen CofE Aided First School

    Voluntary aided school

    586 m

Recorded crime

Within 1 mile of this postcode

View all nearby crime records
Published events
2,319
Months covered
12
Latest month
June 2026

Most recorded categories in this period

  • Violence and sexual offences 665
  • Shoplifting 306
  • Anti social behaviour 212
  • Other theft 198
  • Public order 197

Census 2021

Population and age profile

Postcode residents
Not supplied
Postcode households
Not supplied
Residents per household
Not available
SL4 3 residents
9,075

Age bands in SL4 3

Wider postcode sector
Age 0 to 14
17.2%

1,550 residents

Age 15 to 24
9.9%

891 residents

Age 25 to 44
27.9%

2,520 residents

Age 45 to 64
29.1%

2,627 residents

Age 65 and over
16%

1,449 residents

How to read these estimates
The standard postcode headcounts and the commissioned age table are separate ONS outputs. Small counts are disclosure-controlled, and totals can differ slightly between tables. Coverage is England and Wales only.

Census Day: 21 March 2021. Sources: ONS/Nomis P001-P004 and ONS CT21_0228. Age table version 2024-04-08.

Fixed broadband coverage

Ofcom's predicted availability across all residential and commercial premises in this postcode in January 2026.

Superfast, 30 Mbit/s+
100%
Ultrafast, 100 Mbit/s+
100%
Ultrafast, 300 Mbit/s+
100%
Gigabit-capable
100%
Unable to receive decent fixed or FWA broadband
0%
Next Generation Access
100%
Decent broadband available from fixed wireless
0%
Coverage is a modelled postcode-level snapshot, not a speed test or a guarantee for a named property. Check availability with providers before making a decision. Ofcom does not publish postcode-level full-fibre coverage in this release for commercial-confidentiality reasons.

Source: Ofcom Connected Nations Spring 2026, version 2026-01-v2. Contains Ofcom data licensed under the Open Government Licence v3.0.

NHS ODS

GP practices

14

within 5 km

  • LEE HOUSE SURGERY

    84 OSBORNE ROAD, WINDSOR, SL4 3EW

    ODS code K81046

    309 m

  • CLARENCE MEDICAL CENTRE

    VANSITTART ROAD, WINDSOR, SL4 5AS

    ODS code K81074

    364 m

  • SHEET STREET SURGERY

    21 SHEET STREET, WINDSOR, SL4 1BZ

    ODS code K81068

    538 m

  • SOUTH MEADOW SURGERY

    3 CHURCH CLOSE, ETON, WINDSOR, SL4 6AP

    ODS code K81630

    1.2 km

  • DATCHET HEALTH CENTRE

    GREEN LANE, DATCHET, SLOUGH, SL3 9EX

    ODS code K81021

    2.6 km

  • CHAPEL MEDICAL CENTRE

    SLOUGH WALK IN CENTRE, UPTON HOSPITAL, ALBERT STREET, SLOUGH, SL1 2BJ

    ODS code Y00265

    3.3 km

  • HERSCHEL MEDICAL CENTRE

    45 OSBORNE STREET, SLOUGH, SL1 1TT

    ODS code K81043

    3.4 km

  • SHREEJI MEDICAL CENTRE

    22 WHITBY ROAD, SLOUGH, SL1 3DQ

    ODS code K81085

    4.5 km

  • CROSBY HOUSE SURGERY

    91 STOKE POGES LANE, SLOUGH, SL1 3NY

    ODS code K81034

    4.5 km

  • THE VILLAGE MEDICAL CENTRE

    45 MERCIAN WAY, CHIPPENHAM, SLOUGH, SL1 5ND

    ODS code K81082

    4.5 km

  • DR NABI

    261 BATH ROAD, SLOUGH, SL1 5PP

    ODS code K81608

    4.7 km

  • SLOUGH TREATMENT, ADVICE & RECOVERY TEAM

    ELLIMAN RESOURCE CENTRE, 27 PURSERS CLOSE, SLOUGH, SL2 5DL

    ODS code Y01253

    4.7 km

  • KUMAR MEDICAL CENTRE

    59 GRASMERE AVENUE, SLOUGH, SL2 5JE

    ODS code K81616

    4.7 km

  • 240 WEXHAM ROAD

    WEXHAM ROAD, SLOUGH, SL2 5JP

    ODS code K81645

    4.9 km

Organisation records, not service availability
These are records marked active in NHS England's Organisation Data Service for England and Wales. Branch surgeries, pharmacies, dentists and hospitals are not included. They do not confirm patient registration, services, opening hours, appointments or care quality. Distances are straight-line from the postcode point.

Source acquired on 2026-09-03. Contains information from NHS England, licenced under the current version of the Open Government Licence.

Nearby transport

  • William Street

    BCT · Windsor

    0.1 miles

  • William Street

    BCT · Windsor

    0.1 miles

  • Alma Road

    BCT · Windsor

    0.1 miles

  • Charles Street

    BCT · Windsor

    0.2 miles

  • Alexandra Road

    BCT · Windsor

    0.2 miles

Relative deprivation

English Indices of Deprivation 2025 for Windsor and Maidenhead 012A, the published LSOA linked to this postcode. Decile 1 contains the most deprived 10% of English LSOAs and decile 10 the least deprived 10%.

Overall IMD decile

7 of 10

Overall England rank

22,393 of 33,755

Income
6 of 10
Employment
7 of 10
Education and skills
8 of 10
Health and disability
10 of 10
Crime
3 of 10
Housing and services
8 of 10
Living environment
4 of 10

These are relative area statistics, not measures of an individual household, affluence or absolute change. They cannot be compared with indices for other UK nations. Source: English Indices of Deprivation 2025, version 2025-v2.

Flood risk

Environment Agency long-term indicators for the area around addresses in this postcode. They are not an assessment of any individual property and do not show current or forecast flooding.

High risk addresses
0
Medium risk addresses
0
Low risk addresses
0
Groundwater flood alert area
Unlikely

Source: Environment Agency flood-risk postcode search tool data, version 2026-06-18. Check the long-term risk for an individual area. © Environment Agency copyright and/or database right 2025. All rights reserved.

Evidence in context

A factual reading of the data in this report's scope. It is not a location score or a recommendation.

Schools

Published establishments

66 open schools are in scope, including 27 primary and 16 secondary schools. Upton House School is the nearest published school at 316 m.

Counts describe active establishment records. They do not assess admissions, catchments or quality.

Recorded crime

Published police records

2,319 published events cover 12 months, averaging 193.25 events per published month. The largest recorded category is Violence and sexual offences with 665 events.

The source publishes anonymised street-level events. These figures are not a measure of safety for an individual address.