SN3 4SX

South Marston · Swindon · England

Updated September 2026

Compare this postcode

Location overview

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Post town
Swindon
Local authority
Swindon
Constituency
Swindon North
Postcode district
SN3
Postcode sector
SN3 4

Nearby postcodes

Nearby postcode distances
Postcode Distance
SN6 7QG 613 m
SN3 4SU 1.0 km
SN6 8HS 1.1 km
SN3 4SL 1.1 km
SN3 4ST 1.2 km
Complete postcode fields and official codes
Postcode
SN3 4SX
Status
Current
Introduced
1 January 1980
Terminated
Not published
Postcode area
SN
Postcode district
SN3
Postcode sector
SN3 4
Latitude
51.592299
Longitude
-1.698038
British National Grid easting
421,014
British National Grid northing
188,204

Statistical and administrative geographies

Country
England · E92000001
Region
South West · E12000009
Local authority district
Swindon · E06000030
Parish or community
E04012669
Westminster constituency
Swindon North · E14001536
Output area
E00078254
Lower layer super output area
Swindon 008A · E01015473
Middle layer super output area
Swindon 008 · E02003219

Postcode source versions

Explore SN3

3 recorded sales at this postcode
Address Date Price
Priors Farley Farmhouse, South Marston, Swindon, SN3 4SX 9 April 2021 £495,000
Priors Farley Farmhouse, South Marston, Swindon, SN3 4SX 3 January 2019 £810,000
Priors Farley Farmhouse, South Marston, Swindon, SN3 4SX 24 March 2005 £380,000

Schools

Within 3.1 miles of this postcode

View all nearby schools
Open schools
24
Primary
17
Secondary
3
  1. South Marston Church of England Primary School

    Academy converter

    1.6 km
  2. Pinewood School

    Other independent school

    2.5 km
  3. Maranatha Christian School

    Other independent school

    2.6 km

Recorded crime

Within 1 mile of this postcode

View all nearby crime records
Published events
21
Months covered
12
Latest month
June 2026

Most recorded categories in this period

  • Vehicle crime 5
  • Violence and sexual offences 5
  • Drugs 2
  • Other theft 2
  • Public order 2

Census 2021

Population and age profile

Postcode residents
Not supplied
Postcode households
Not supplied
Residents per household
Not available
SN3 4 residents
13,036

Age bands in SN3 4

Wider postcode sector
Age 0 to 14
15.2%

1,972 residents

Age 15 to 24
10%

1,299 residents

Age 25 to 44
23.5%

3,054 residents

Age 45 to 64
29%

3,774 residents

Age 65 and over
22.3%

2,898 residents

Small counts are adjusted for privacy, so totals can differ slightly between Census tables.

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+
0%
Ultrafast, 100 Mbit/s+
0%
Ultrafast, 300 Mbit/s+
0%
Gigabit-capable
0%
Unable to receive decent fixed or FWA broadband
100%
Next Generation Access
0%
Decent broadband available from fixed wireless
0%

Predicted coverage, not measured speeds. Check availability for your address with a provider. Postcode-level full-fibre figures are not published in this release.

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

GP practices

4

within 5 km straight-line

  • ELM TREE SURGERY

    HIGH STREET, SHRIVENHAM, SWINDON, SN6 8AG

    ODS code K84012

    3.1 km

  • MERCHISTON SURGERY

    HIGHWORTH ROAD, STRATTON ST MARGARET, SWINDON, SN3 4BF

    ODS code J83001

    3.6 km

  • WESTROP MEDICAL PRACTICE

    NEWBURGH PLACE, HIGHWORTH, SWINDON, SN6 7DN

    ODS code J83002

    4.7 km

  • ELDENE SURGERY

    COLINGSMEAD, ELDENE, SWINDON, SN3 3TQ

    ODS code J83047

    4.9 km

Nearby transport

  • South Marston Turn East

    BCT · South Marston

    0.8 miles
  • South Marston Turn East

    BCT · South Marston

    0.8 miles
  • South Marston Turn East

    BCT · South Marston

    0.8 miles
  • South Marston Turn East

    BCT · South Marston

    0.8 miles
  • Magdalene Close

    BCT · South Marston

    0.9 miles

Relative deprivation

English Indices of Deprivation 2025 for Swindon 008A, 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

23,393 of 33,755

Income
7 of 10
Employment
7 of 10
Education and skills
6 of 10
Health and disability
8 of 10
Crime
10 of 10
Housing and services
2 of 10
Living environment
9 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

Schools

24 open schools are in scope, including 17 primary and 3 secondary schools. South Marston Church of England Primary School is the nearest published school at 1.0 miles.

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

Recorded crime

21 published events cover 12 months, averaging 1.75 events per published month. The largest recorded category is Vehicle crime with 5 events.

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